Small Satellites - The Aerospace Corporation
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Small Satellites: Past, Present, and Future Henry Helvajian and Siegfried W. Janson Editors 7KH$HURVSDFH3UHVV(O6HJXQGR&DOLIRUQLD $PHULFDQ,QVWLWXWHRI$HURQDXWLFVDQG$VWURQDXWLFV,QF5HVWRQ9LUJLQLD Contents Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvii Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxv Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxi 1 The First Small Satellites: Sputnik, Explorer, and Vanguard . . . . . . . . . . . . . . . . . . . . . 1 ,QWURGXFWLRQ 7KH+LVWRULFDO%DFNJURXQG 6SXWQLN, ([SORUHU, 20 9DQJXDUG 25 $GGLWLRQDO6SXWQLN/DXQFKHV $GGLWLRQDO([SORUHU/DXQFKHV 33 $GGLWLRQDO9DQJXDUG/DXQFKHV &RQFOXVLRQV 5HIOHFWLRQV $FNQRZOHGJPHQWV %LEOLRJUDSK\ 2 The History of Small Satellites. . . . . . . . . . . . . . . . . . . . . . . 47 ,QWURGXFWLRQ 0LFUR1DQR3LFRVDWHOOLWHV 1DQR3LFRVDWHOOLWH'HYHORSPHQWDW7KH$HURVSDFH&RUSRUDWLRQ 1DQRVDWHOOLWH7HFKQRORJLHV 6XPPDU\ $FNQRZOHGJPHQWV 5HIHUHQFHV 3 Clementine: The Rebirth of Smaller, High-Value Missions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 ,QWURGXFWLRQ 7KH0LVVLRQ 0LVVLRQ2XWFRPH 1HZ3D\ORDG7HFKQRORJLHV 1HZ%XV7HFKQRORJLHV vii Contents 0LVVLRQ0DQDJHPHQW 6FLHQWLILF5HVXOWV &RQFOXVLRQV $FNQRZOHGJPHQWV 5HIHUHQFHV 4 The Role of AMSAT in the Evolution of Small Satellites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 ,QWURGXFWLRQ (DUO\$PDWHXU6DWHOOLWHV 7KH3KDVH6DWHOOLWHV 7KH3KDVH6DWHOOLWHV 7KH3KDVH6DWHOOLWHV 7KH3KDVH6DWHOOLWHV $PDWHXU6DWHOOLWH/DXQFKHVDQG/DXQFK6LWHV 2SHUDWLRQV $06$7(GXFDWLRQDO3URMHFWV &RQFOXVLRQ 5HIHUHQFHV 5 Origin of CubeSat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 ,QWURGXFWLRQDQG&RQFHSW+LVWRU\ $1HZ'LUHFWLRQ +LVWRU\RI&XEH6DW/DXQFKHV <RXU2ZQ3HUVRQDO&XEH6DW 'HYHORSLQJ1HZ7HFKQRORJLHV8VLQJ&XEH6DWV &XEH6DWDVD7HDFKLQJ7RRO $FFHSWDQFHRIWKH&XEH6DW6WDQGDUG )XWXUH3ODQVIRU/DUJHURU6PDOOHU&XEH6DWV $FNQRZOHGJPHQWV %LEOLRJUDSK\ 6 Coalition Operationally Responsive Space: A “100 Satellite” Solution . . . . . . . . . . . . . . . . . . . . . . . . . 175 ,QWURGXFWLRQ 7DF6DW+LVWRU\ &RDOLWLRQ2567KH/RJLFIRU&RRSHUDWLRQ 1$72$+\SRWKHWLFDO&DVH6WXG\IRU&RDOLWLRQ256 6XPPDU\ 5HIHUHQFHV viii Contents 7 The United States Air Force Academy FalconSAT Small Satellite Program . . . . . . . . . . . . . . . . . 187 ,QWURGXFWLRQ 3URJUDP0HWKRGRORJ\ +LVWRU\RIWKH)DOFRQ6$73URJUDP %DOORRQV )DOFRQ*2/' )DOFRQ6$7 )DOFRQ6$7 )DOFRQ6$7 )DOFRQ6$7 )DOFRQ6$7 )DOFRQ6$7 222 /HVVRQV/HDUQHG 222 &RQFOXVLRQV 225 5HIHUHQFHs 8 The United States Naval Academy Small Low-Cost APRS Satellites . . . . . . . . . . . . . . . . . . . . 227 ,QWURGXFWLRQ 7KH$3560LVVLRQ 3&6$7 3&6$7 $1'( 5$)7 &RQFOXVLRQ 5HIHUHQFHV 9 The Naval Postgraduate School Small Satellites Program . . . . . . . . . . . . . . . . . . . . . . . . . . 269 ,QWURGXFWLRQ 6SDFH6\VWHPV&XUULFXOD 8QLYHUVLW\DQG'HIHQVH(IIRUWVLQ6PDOO6DWHOOLWHV 2ULRQ 3$16$7 136$7 &XEH6DWV &RQFOXVLRQ 5HIHUHQFHV ix Contents 10 The UK’s First Nanosatellite—SNAP-1 . . . . . . . . . . . . . 297 ,QWURGXFWLRQ 61$3'HVLJQ3KLORVRSK\ 300 'HVLJQDQG&RQVWUXFWLRQRI61$3 303 $YLRQLFV 3URSXOVLRQ6\VWHP 3D\ORDGV )OLJKW5HVXOWV 61$3·V/HJDF\ 322 &RQFOXVLRQV $FNQRZOHGJPHQWV 5HIHUHQFHV 11 Microvariability and Oscillations of STars (MOST) Mission: Canada’s First Microsatellite and Space Telescope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 ,QWURGXFWLRQ 7KH6FLHQFH 7KH6DWHOOLWH 332 7KH$SSURDFK 7KH2XWFRPH /RZ&RVW6DWHOOLWH7HFKQRORJLHVDQG$SSURDFKHV 7KH6SDFH)OLJKW/DERUDWRU\ $FNQRZOHGJPHQWV 5HIHUHQFHV 12 TUBSAT: The Technical University of Berlin Satellite Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349 ,QWURGXFWLRQ 78%6$7$ 352 78%6$7% 78%6$711 '/578%6$7 0$52&78%6$7 /$3$178%6$7 )XWXUH'HYHORSPHQWVDW78%HUOLQ 5HIHUHQFHV x Contents 13 Proba: ESA’s Series of Small Satellite Testbeds . . . . . . . 385 %DFNJURXQG *URXQG6WDWLRQDQG2SHUDWLRQV'HYHORSPHQWV 6SDFH6HJPHQW4XDOLW\DQG5HOLDELOLW\&RQVLGHUDWLRQV 3URED 3URED 3URED 7KH)XWXUH )XUWKHU5HDGLQJ 14 A Revolutionary Approach to Spacecraft Design, Production, and Operations: Orbital’s MicroStar Satellite . . . . . . . . . . . . . . . . . . . . . . 407 ,QWURGXFWLRQ7KH0LFUR6WDU6SDFHFUDIW :KDWLV25%&200" 'HYHORSPHQWRIWKH0LFUR6WDU6SDFHFUDIWIRU25%&200 7KH&RQVWHOODWLRQ³$)XOO3URGXFWLRQ3URJUDP $GDSWLQJ0LFUR6WDUWR2WKHU0LVVLRQV 7KH)XWXUHRI0LFUR6WDU &RQFOXVLRQ $FNQRZOHGJPHQWV %LEOLRJUDSK\ 15 Japan’s Small Scientific Satellite, “INDEX” (Reimei) . 449 ,QWURGXFWLRQ 0LVVLRQDQG6\VWHP'HVFULSWLRQ /DXQFKDQG7UDFNLQJ2SHUDWLRQV 6DWHOOLWH3HUIRUPDQFHDQG2Q2UELW5HVXOWV /HVVRQV/HDUQHG &RQFOXVLRQ 5HIHUHQFHV 16 Mini AERCam: The Miniature Autonomous Extravehicular Robotic Camera . . . . . . . . 487 ,QWURGXFWLRQ $(5&DP3URMHFW+LVWRU\ 0LQL$(5&DP7HFKQRORJ\'HPRQVWUDWRU 0LQL$(5&DP7HVWLQJDQG$QDO\VLV xi Contents 0LQL$(5&DP$SSOLFDWLRQV &RQFOXVLRQV 5HIHUHQFHV 522 17 Developing and Maturing Microsatellite Formation Flight Technology . . . . . . . . . 525 ,QWURGXFWLRQ 525 0RWLYDWLRQIRU6DWHOOLWH)RUPDWLRQ)OLJKW 525 (OHFWURPDJQHWLF)RUPDWLRQ)OLJKW 0DWXULQJ)RUPDWLRQ)OLJKW*1& 7HFKQRORJ\0DWXUDWLRQLQ$FWLRQ8VLQJ6PDOO6DWHOOLWHV 6XPPDU\ $FNQRZOHGJPHQWV 555 5HIHUHQFHV 555 18 A Mass-Producible Glass/Ceramic Micropropulsion Unit for a Co-Orbiting Satellite Assistant (COSA) Mission . 559 2YHUYLHZ 7KH&26$0LVVLRQ &26$30'HVLJQ +DUGZDUH7HVWLQJ (OHFWURQLFVDQG6RIWZDUH'HYHORSPHQW &26$30´)OLJKWµ7HVW /HVVRQV/HDUQHGDQG)XWXUH'LUHFWLRQ &RQFOXVLRQV $FNQRZOHGJPHQWV 5HIHUHQFHV 19 Toward Space-Based Wireless Sensor Networks . . . . . . 595 ,QWURGXFWLRQ 6SDFH%DVHG6HQVRU1HWZRUNV&RQVLGHUDWLRQV 6XENLORJUDP6DWHOOLWH7HFKQRORJ\2SWLRQV 6\VWHPRQ&KLS$SSURDFKWR6DWHOOLWH6XEV\VWHP0LQLDWXUL]DWLRQ (QDEOLQJ7HFKQRORJLHVIRU'LVWULEXWHG 3LFRVDWHOOLWH0LVVLRQVLQ/(2 &RQFOXVLRQV $FNQRZOHGJPHQWV 5HIHUHQFHV xii Contents 20 Picosatellites at The Aerospace Corporation . . . . . . . . . 635 ,QWURGXFWLRQ 23$/DQG0LJKW\6DW,, 0(36, 6SDFH6KXWWOH3LFRVDWHOOLWH/DXQFKHUV $HUR&XEHV &RQFOXVLRQ $FNQRZOHGJPHQWV 5HIHUHQFHV 21 Small Satellite Mission Design and Operations . . . . . . . 675 ,QWURGXFWLRQWR6PDOO6DWHOOLWH0LVVLRQ'HVLJQDQG2SHUDWLRQV 3UHIOLJKW3ODQQLQJ 2UELW6HOHFWLRQDQG3UHGLFWHG2UELW/LIHWLPH *URXQG6WDWLRQ6HOHFWLRQ3ODFHPHQWDQG$QWLFLSDWHG/LQN0DUJLQ 5DGDU/DVHUDQG2SWLFDO7UDFNLQJ 6DWHOOLWH'HVLJQWR0D[LPL]H2SHUDWLRQV6XFFHVV 2SHUDWLRQV7HVWLQJDQG7UDLQLQJ 2EWDLQLQJ6WDWH9HFWRUVDQG*HQHUDWLQJ7ZR/LQH(OHPHQWV 'HSOR\PHQW6HTXHQFLQJDQG5HFRQWDFW$YRLGDQFH *URXQG7HOHPHWU\$QWHQQD2SHUDWLRQVDQG3RLQWLQJ 3RVWODXQFK'UDJDQG0DQHXYHU3HUIRUPDQFH$VVHVVPHQW &KDSWHU6XPPDU\ 5HIHUHQFHV 22 Small Satellites: Space Debris and Reentry Hazards . . . . . . . . . . . . . . . . 729 %DFNJURXQG 'HEULV0LQLPL]DWLRQ*XLGHOLQHVDQG5HTXLUHPHQWV 5HHQWU\%UHDNXS2YHUYLHZ 2UELW/LIHWLPH(VWLPDWLRQDQG5HGXFWLRQ ,VVXHVIRU6PDOO6DWHOOLWHV 'HRUELW'DWD 6XPPDU\ $FNQRZOHGJPHQWV 5HIHUHQFHV xiii Contents 23 The Future of Small Satellites . . . . . . . . . . . . . . . . . . . . . 771 ,QWURGXFWLRQ 6DWHOOLWH6FDOLQJ,VVXHV 2UELWDO0HFKDQLFVRI0XOWLVDWHOOLWH6\VWHPV 6SDFHFUDIW6WDELOL]DWLRQ 6PDOO6DWHOOLWH0LVVLRQV &RQFOXVLRQV $FNQRZOHGJPHQWV 5HIHUHQFHV 24 The Generation After Next: Satellites as an Assembly of Mass-Producible Functionalized Modules. . . . . . . . . . . . . . . . . . . . . . . . . . 815 ,QWURGXFWLRQ 0DVV0DQXIDFWXUH0DVV&XVWRPL]DWLRQDQG%XLOGWR2UGHU 7KH0)0DQG0LFURHOHFWURQLFV)DEULFDWLRQ *ODVV&HUDPLFV'3DWWHUQLQJ 7KRXJKWVRQ'HYHORSPHQWRID0DVV&XVWRPL]HG0)0)RXQGU\ DQG1DQRVDWHOOLWHVLQ36*& 6WHSV)RUZDUG &RQFOXVLRQV $FNQRZOHGJPHQWV 5HIHUHQFHV Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .859 xiv Contributors William AilorLV3ULQFLSDO'LUHFWRURIWKH&HQWHUIRU2UELWDODQG5HHQWU\'HEULV 6WXGLHV&25'6DW7KH$HURVSDFH&RUSRUDWLRQLQ(O6HJXQGR&DOLIRUQLD &KDSWHU6PDOO6DWHOOLWHV6SDFH'HEULVDQG5HHQWU\+D]DUGV David J. Barnhart 0DM 86$) LV $VVLVWDQW 3URIHVVRU DW WKH 6SDFH 6\VWHPV 5HVHDUFK &HQWHU LQ WKH 'HSDUWPHQW RI $VWURQDXWLFV 8QLWHG 6WDWHV $LU )RUFH $FDGHP\LQ&RORUDGR &KDSWHU7KH86$LU)RUFH$FDGHP\)DOFRQ6$76PDOO6DWHOOLWH3URJUDP &KDSWHU7RZDUG6SDFHEDVHG:LUHOHVV6HQVRU1HWZRUNV Dirk BernaertsLVWKH3URED3URMHFW0DQDJHUDWWKH(XURSHDQ6SDFH7HFKQRO RJ\&HQWUH1RRUGZLMN7KH1HWKHUODQGV &KDSWHU3URED(6$·V6HULHVRI6PDOO6DWHOOLWH7HVWEHGV Bob Bruninga&GU861>UHW@WHDFKHVDWWKH6DWHOOLWH/DEDWWKH8QLWHG6WDWHV 1DYDO$FDGHP\LQ$QQDSROLV0DU\ODQG:%$35 &KDSWHU7KH861DYDO$FDGHP\6PDOO/RZ&RVW$3566DWHOOLWHV Matthias Buhl LV D 6FLHQFH$VVRFLDWH DW WKH ,QVWLWXW IU /XIW XQG 5DXPIDKUW WHFKQLNDWWKH7HFKQLVFKH8QLYHUVLWlW%HUOLQ*HUPDQ\ &KDSWHU78%6$77KH7HFKQLFDO8QLYHUVLW\RI%HUOLQ6DWHOOLWH3URJUDP Vladimir ChobotovLVDPHPEHURIWKH&HQWHUIRU2UELWDODQG5HHQWU\'HEULV 6WXGLHV&25'6DW7KH$HURVSDFH&RUSRUDWLRQLQ(O6HJXQGR&DOLIRUQLD &KDSWHU6PDOO6DWHOOLWHV6SDFH'HEULVDQG5HHQWU\+D]DUGV Srimal W. ChoiLV6HQLRU3ULQFLSDO6\VWHPV(QJLQHHUDW2UELWDO6FLHQFHV&RUSR UDWLRQLQ'XOOHV9LUJLQLD &KDSWHU$5HYROXWLRQDU\$SSURDFK2UELWDO·V0LFUR6WDU6DWHOOLWH Thomas Doyne&RO86$)LV'HSXW\RI6SDFH3URJUDPVDQG3ROLF\'LUHFWRU DWH8QLWHG6WDWHV$LU)RUFH$UOLQJWRQ9LUJLQLD &KDSWHU&RDOLWLRQ2SHUDWLRQDOO\5HVSRQVLYH6SDFH Steven Fredrickson LV &KLHI RI WKH ,QWHOOLJHQW 6\VWHPV %UDQFK $XWRPDWLRQ 5RERWLFVDQG6LPXODWLRQ'LYLVLRQDW1$6$-RKQVRQ6SDFH&HQWHULQ+RXVWRQ 7H[DV &KDSWHU0LQL$(5&DP William W. HansenLV6HQLRU5HVHDUFK$VVRFLDWHLQWKH3K\VLFDO6FLHQFHV/DER UDWRULHVDW7KH$HURVSDFH&RUSRUDWLRQLQ(O6HJXQGR&DOLIRUQLD &KDSWHU0DVV3URGXFLEOH*ODVV&HUDPLF0LFURSURSXOVLRQ8QLWIRU&26$ David Hardy LV 3URED 6\VWHPV (QJLQHHU DW WKH (XURSHDQ 6SDFH 7HFKQRORJ\ &HQWUH1RRUGZLMN7KH1HWKHUODQGV &KDSWHU3URED(6$·V6HULHVRI6PDOO6DWHOOLWH7HVWEHGV xvii Contributors Steven L. HastLV6HQLRU3URMHFW/HDGHULQWKH$VWURG\QDPLFV'HSDUWPHQWDW7KH $HURVSDFH&RUSRUDWLRQLQ(O6HJXQGR&DOLIRUQLD &KDSWHU6PDOO6DWHOOLWH0LVVLRQ'HVLJQDQG2SHUDWLRQV Dean HawesLVWKH0LFUR6WDU3URGXFW/LQH/HDGDW2UELWDO6FLHQFHV&RUSRUDWLRQ LQ'XOOHV9LUJLQLD &KDSWHU$5HYROXWLRQDU\$SSURDFK2UELWDO·V0LFUR6WDU6DWHOOLWH Henry HelvajianLVD6HQLRU6FLHQWLVWLQWKH3K\VLFDO6FLHQFHV/DERUDWRULHVDQG UXQVWKH/DERUDWRU\IRU/DVHU0LFURHQJLQHHULQJ6FLHQFHDW7KH$HURVSDFH&RUSR UDWLRQLQ(O6HJXQGR&DOLIRUQLD+HLVWKHHGLWRURIMicroengineering Aerospace Systems$,$$7KH$HURVSDFH3UHVV &KDSWHU0DVV3URGXFLEOH*ODVV&HUDPLF0LFURSURSXOVLRQ8QLWIRU&26$ &KDSWHU6DWHOOLWHVDV0DVV3URGXFLEOH)XQFWLRQDOL]HG0RGXOHV David Hinkley LV 3URMHFW /HDGHU LQ WKH 3K\VLFDO 6FLHQFHV /DERUDWRULHV DW7KH $HURVSDFH&RUSRUDWLRQLQ(O6HJXQGR&DOLIRUQLD &KDSWHU3LFRVDWHOOLWHVDW7KH$HURVSDFH&RUSRUDWLRQ Masafumi HiraharaLV3URIHVVRURI6SDFHDQG3ODQHWDU\6FLHQFH'HSDUWPHQW RI(DUWKDQG3ODQHWDU\6FLHQFH*UDGXDWH6FKRRORI6FLHQFH7KH8QLYHUVLW\RI 7RN\R+HVHUYHGDV3ULQFLSDO,QYHVWLJDWRURI6FLHQFH,QVWUXPHQWVIRUWKH5HLPHL PLVVLRQ &KDSWHU-DSDQ·V6PDOO6FLHQWLILF6DWHOOLWH´,1'(;µ5HLPHL Jim HorningLVD5HVHDUFK$VVRFLDWHZLWKWKH6SDFH6\VWHPV$FDGHPLF*URXS *UDGXDWH 6FKRRO RI (QJLQHHULQJ DQG $SSOLHG 6FLHQFHV 1DYDO 3RVWJUDGXDWH 6FKRRO0RQWHUH\&DOLIRUQLD &KDSWHU7KH1DYDO3RVWJUDGXDWH6FKRRO6PDOO6DWHOOLWHV3URJUDP Adam HuangLVDQ$VVLVWDQW3URIHVVRULQWKH'HSDUWPHQWRI0HFKDQLFDO(QJL QHHULQJDWWKH8QLYHUVLW\RI$UNDQVDVLQ)D\HWWHYLOOH$UNDQVDV &KDSWHU0DVV3URGXFLEOH*ODVV&HUDPLF0LFURSURSXOVLRQ8QLWIRU&26$ Siegfried W. JansonLVD6HQLRU6FLHQWLVWLQWKH3K\VLFDO6FLHQFHV/DERUDWRULHVDW 7KH$HURVSDFH&RUSRUDWLRQLQ(O6HJXQGR&DOLIRUQLD &KDSWHU7KH+LVWRU\RI6PDOO6DWHOOLWHV &KDSWHU0DVV3URGXFLEOH*ODVV&HUDPLF0LFURSURSXOVLRQ8QLWIRU&26$ &KDSWHU7KH)XWXUHRI6PDOO6DWHOOLWHV Frederick T. Kiley LV 3URIHVVRU DW WKH 6SDFH 6\VWHPV 5HVHDUFK &HQWHU LQ WKH 'HSDUWPHQWRI$VWURQDXWLFVDWWKH8QLWHG6WDWHV$LU)RUFH$FDGHP\LQ&RORUDGR &KDSWHU7KH86$LU)RUFH$FDGHP\)DOFRQ6$76PDOO6DWHOOLWH3URJUDP Timothy J. Lawrence/W&RO86$)LV'LUHFWRURIWKH6SDFH6\VWHPV5HVHDUFK &HQWHUDQG$VVLVWDQW3URIHVVRUIRUWKH'HSDUWPHQWRI$VWURQDXWLFVDWWKH8QLWHG 6WDWHV$LU)RUFH$FDGHP\LQ&RORUDGR &KDSWHU7KH86$LU)RUFH$FDGHP\)DOFRQ6$76PDOO6DWHOOLWH3URJUDP xviii Contributors Jaymie M. MatthewsLV02670LVVLRQ6FLHQWLVWDQG3URIHVVRURI3K\VLFVDQG $VWURQRP\DWWKH8QLYHUVLW\RI%ULWLVK&ROXPELDLQ9DQFRXYHU&DQDGD &KDSWHU0LFURYDULDELOLW\DQG2VFLOODWLRQVRI67DUV02670LVVLRQ David W. 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Zee LV 'LUHFWRU RI WKH 6SDFH )OLJKW /DERUDWRU\ DW WKH 8QLYHUVLW\ RI 7RURQWR,QVWLWXWHIRU$HURVSDFH6WXGLHVLQ7RURQWR&DQDGD &KDSWHU0LFURYDULDELOLW\DQG2VFLOODWLRQVRI67DUV02670LVVLRQ xx Chapter 1 The First Small Satellites: Sputnik, Explorer, and Vanguard 5*LOEHUW0RRUH 1.1 Introduction 7KUHH VPDOO VDWHOOLWHV ZHUH WKH ILUVW WR EH ODXQFKHG LQWR ORZ (DUWK RUELW GXU LQJWKH,QWHUQDWLRQDO*HRSK\VLFDO<HDU,*<RI²WREHJLQWKH6SDFH $JH6SXWQLN,([SORUHU,DQG9DQJXDUG)LJVDQG$WWKHWLPHWKH 8QLWHG6WDWHVDQGWKH6RYLHW8QLRQZHUHHQJDJHGLQD´&ROG:DUµ%RWKFRXQWULHV ZHUHGHYHORSLQJWKHUPRQXFOHDUZDUKHDGVDQGLQWHUFRQWLQHQWDOEDOOLVWLFPLVVLOHV ,&%0VFDSDEOHRIGHOLYHULQJWKHLUKRUULILFZHDSRQVRIPDVVGHVWUXFWLRQRQWR WKHRWKHU·VWHUULWRU\ 7KHIHDUDQGVXVSLFLRQWKDWSHUYDGHGWKHUHODWLRQVEHWZHHQWKHVHFRXQWULHV GXULQJWKH&ROG:DUZDVVRLQWHQVHWKDWWKHHDUO\6RYLHWVDWHOOLWHSURJUDPZDV FRQGXFWHGLQFRPSOHWHVHFUHF\,QIDFWWKHLGHQWLW\RI6HUJHL3DYORYLFK.RUROHY WKH OHDGHU RI WKH 6RYLHW VSDFH SURJUDP ZDV KLGGHQ XQGHU WKH WLWOH ´&KLHI 'H VLJQHUµ DSSDUHQWO\ LQ IHDU WKDW KH ZRXOG EH NLGQDSSHG RU DVVDVVLQDWHG ,Q WKH 8QLWHG6WDWHVWKH([SORUHUSURJUDPZDVDOVRFRQGXFWHGSDUWLDOO\LQVHFUHF\2QO\ WKH861DY\·V9DQJXDUGSURJUDPZDVFRQGXFWHGFRPSOHWHO\LQWKHRSHQ$VD UHVXOWPXFKRIWKHHDUO\KLVWRU\RIWKHZRUOG·VILUVWWKUHHVPDOOVDWHOOLWHVEHFDPH EDGO\PLVUHSRUWHGLQWKHSXEOLFSUHVVDWWKHWLPHDQGPDQ\PLVFRQFHSWLRQVDERXW WKHPVWLOOOLQJHUWRGD\,WLVWKHSXUSRVHRIWKHRSHQLQJFKDSWHURIWKLVERRNWR GHVFULEHWKLVKLVWRU\LQDQREMHFWLYHPDQQHUVRWKHUHDGHUFDQMXGJHWKHSURJUDPV· WUXHDFFRPSOLVKPHQWVIURPWKHSHUVSHFWLYHRI\HDUVRILQWHUYHQLQJKLVWRU\ 1.2 The Historical Background 1.2.1 Sounding Rockets 7KHVL]HRIWKHODXQFKYHKLFOHVDQGVDWHOOLWHVWKDWZHUHIORZQGXULQJ,*<ZHUH KHDYLO\LQIOXHQFHGE\WKHSUHGHFHVVRUVRXQGLQJURFNHWDQGPLVVLOHSURJUDPVWKDW KDGEHHQFRQGXFWHGE\WKH8QLWHG6WDWHVDQGWKH6RYLHW8QLRQEHIRUHGXULQJDQG DIWHU:RUOG:DU,,7KHZRUOG·VILUVWVRXQGLQJURFNHWVZHUHEXLOWDQGODXQFKHGE\ 5REHUW+*RGGDUGRI:RUFHVWHU0DVVDFKXVHWWV+LVVKRUWWHUPREMHFWLYHZDVWR GHYHORSDIDPLO\RIOLTXLGSURSHOOHGURFNHWVWKDWFRXOGH[WHQGPHDVXUHPHQWVRI WKH DWPRVSKHUH·V FKDUDFWHULVWLFV WR DOWLWXGHV DERYH WKRVH UHDFKDEOH E\ UHVHDUFK EDOORRQVaNP,QWKHORQJWHUPKHKRSHGWRODXQFKDURFNHWWRWKHPRRQDQG 'HSWRI3K\VLFV8WDK6WDWH8QLYHUVLW\ /RJDQ8WDK 1 Sputnik, Explorer, and Vanguard Courtesy of M. Votaw Courtesy of NASA Courtesy of NASA 2 Fig. 1.1. Two views of Sputnik I (top). Explorer I (middle). Robert Bauman with Vanguard 1 (bottom). 3 Courtesy of B. Fraze The Historical Background Fig. 1.2. Comparative sizes of the Sputnik I, Explorer I, and Vanguard 1 satellites (left, top to bottom) and their respective launch vehicles, R-7, Juno I, and Vanguard (right, left to right). VHWRIIDPDJQHVLXPSRZGHUIODVKWKDWZRXOGEHYLVLEOHWRWHOHVFRSHVRQ(DUWK +H SXEOLVKHG KLV ILUVW IRUPDO SDSHU RQ URFNHWU\ DQG VSDFH IOLJKW LQ D UHSRUW WR WKH6PLWKVRQLDQ,QVWLWXWLRQLQ+HODXQFKHGKLVILUVWOLTXLGSURSHOOHGURFNHW RQ0DUFK)LJIURPDIDUPQHDU$XEXUQ0DVVDFKXVHWWVDQGIRO ORZHGXSZLWKDVHULHVRIDGGLWLRQDOIOLJKWVIURPWKDWVLWHWKHVHIOLJKWVZHUHPDGH SRVVLEOHE\DVPDOOJUDQWIURPWKH6PLWKVRQLDQ,QVWLWXWLRQLQ:DVKLQJWRQ'& +RZHYHUXQGHUSUHVVXUHIURPWKHORFDOILUHPDUVKDODQGULGLFXOHIURPORFDOQHZV SDSHUVLQFOXGLQJWKHNew York Times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³LQVKRUWPRVWRIWKHHOHPHQWVUHTXLUHGWRFRQGXFWURFNHWLQYHVWLJDWLRQ RI(DUWK·VXSSHUDWPRVSKHUH 7KURXJKRXWWKLVSKDVHRIKLVZRUN*RGGDUGZDVVSRQVRUHGE\LQWHUPLWWHQW VPDOOJUDQWVIURPWKH*XJJHQKHLP)RXQGDWLRQWRZKRPKHDOVRPDGHSHULRGLF SURJUHVVUHSRUWVWKDWHYHQWXDOO\PDGHWKHLUZD\LQWRWKHSXEOLFOLWHUDWXUH,Q WKH 86 1DY\ %XUHDX RI$HURQDXWLFV DQG WKH 86$UP\$LU &RUSV SUHYDLOHG Sputnik, Explorer, and Vanguard Courtesy of NASA 4 Fig. 1.3. Robert H. Goddard with his first successful liquid-fueled rocket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·V ZRUN WKURXJK KLV SURJUHVV UHSRUWV WR WKH 6PLWKVRQLDQ DQG *XJJHQKHLP RUJDQL]DWLRQV PHPEHUV RI WKH The Historical Background 5 Courtesy of White Sands Missile Range Museum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´$0HWKRGRI5HDFKLQJ([WUHPH$O WLWXGHVµLQDW2EHUWK·VUHTXHVWZKHQ2EHUWKZDVDVWXGHQWDWWKH8QLYHUVLW\ RI+HLGHOEHUJDQGWKHZULWLQJVDQGGHPRQVWUDWLRQVRI$XVWULDQURFNHWHQWKXVLDVW 0D[9DOLHU,QWKHZRUNRIWKHVHJURXSVDQGLQSDUWLFXODUWKHGRFWRUDOWKH VLVRIRQHRI2EHUWK·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ig. 1.4. Tactical V-2 rocket in Germany with mobile ground support vehicles (left). V-2 launch at White Sands Proving Ground on 22 August 1951 (right). 6 Sputnik, Explorer, and Vanguard Courtesy of U.S. Army PDQGZHLJKHGNJDWODXQFK,WVIXHOVZHUHOLTXLGR[\JHQDQGDOFRKRO SXPSHG E\ D K\GURJHQ SHUR[LGH VWHDP WXUELQH LQWR DQ LQMHFWRU ZLWK EXUQHU FXSV DW WKH KHDG HQG RI D VWHHO FRPEXVWLRQ FKDPEHU WKDW SURGXFHG D VHDOHYHO WKUXVWRIN1,WZDVHTXLSSHGZLWKDQDPDWROH[SORVLYHZDUKHDGZHLJKLQJ NJPRUHWKDQZHUHODXQFKHGDWPLOLWDU\DQGFLYLOLDQWDUJHWVLQ(QJ ODQG%HOJLXP)UDQFHDQG+ROODQGLQDQG 1HDU WKH FRQFOXVLRQ RI WKH ZDU LQ FUDWHV RI SDUWV IRU DSSUR[LPDWHO\ 9URFNHWVDQGFRPSOHWHVHWVRIGUDZLQJVZHUHVPXJJOHGRXWRIWKH5XVVLDQ =RQHRIGHIHDWHG*HUPDQ\E\WKH86$UP\DQGWUDQVSRUWHGWRWKH:KLWH6DQGV 3URYLQJ*URXQGLQ1HZ0H[LFR$FRQWLQJHQWRI*HUPDQURFNHWHQJLQHHUV DQGVFLHQWLVWVOHGE\YRQ%UDXQZHUHDOVRWDNHQWR)W%OLVV7H[DVWRWUDQVIHU WKHLU 9 NQRZOHGJH DQG LGHDV IRU IXWXUH URFNHW ZHDSRQ V\VWHPV WR$PHULFDQ HQJLQHHUV$GGLWLRQDOPLVVLOHSDUWVDQGHQJLQHHUVZHUHDOVRWUDQVIHUUHGIURP*HU PDQ\WRWKH6RYLHW8QLRQIRUVLPLODUSXUSRVHV :KLOHWKH9SDUWVDQGHQJLQHHUVZHUHEHLQJDVVHPEOHGLQWKH8QLWHG6WDWHV WKH &DOLIRUQLD ,QVWLWXWH RI 7HFKQRORJ\·V -HW 3URSXOVLRQ /DERUDWRU\ -3/ DQG 'RXJODV$LUFUDIW&RPSDQ\ODXQFKHG3ULYDWH$DQG7LQ\7LPERRVWHUVDQG:DF &RUSRUDOVRXQGLQJURFNHWVIURP:KLWH6DQGV)LJ 7KH861DYDO5HVHDUFK/DERUDWRU\15/EXLOWQHZLQVWUXPHQWVHFWLRQVWR UHSODFHWKHZDUKHDGVRIWKHFDSWXUHG9URFNHWVDQGHTXLSSHGWKHPZLWKUDGLR WHOHPHWU\VXEV\VWHPVWRVXSSRUWVFLHQWLILFVWXGLHVRI(DUWK·VXSSHUDWPRVSKHUH Fig. 1.5. Frank Malina of JPL with Wac Corporal sounding rocket. The Historical Background 7 Courtesy of APL 7KH\LQYLWHGUHVHDUFKVFLHQWLVWVIURPDFURVVWKHFRXQWU\WRDPHHWLQJLQ:DVK LQJWRQ'&RQ-DQXDU\WRGLVFXVVSDUWLFLSDWLRQLQWKHVHHQGHDYRUV7KH 95RFNHW3DQHOZDVIRUPHGDWWKLVPHHWLQJXQGHUWKHFKDLUPDQVKLSRI(UQVW .UDXVHRI15/WRVHWWKHDJHQGDIRUXSSHUDWPRVSKHULFDQGVSDFHUHVHDUFKLQ WKH8QLWHG6WDWHV7KLVSDQHOXQGHUZHQWDVHULHVRIQDPHFKDQJHVDQGPHPEHU LQVWLWXWLRQVGXULQJWKHIROORZLQJWZRGHFDGHVZKLOHLWVQHZFKDLUPDQ-DPHV9DQ $OOHQRIWKH-RKQV+RSNLQV8QLYHUVLW\·V$SSOLHG3K\VLFV/DERUDWRU\FRQWLQXHG .UDXVH·V HIIRUWV WR DVVLJQ URFNHWV WR LWV SDUWLFLSDWLQJ VFLHQWLVWV %HWZHHQ DQG9URFNHWVZHUHODXQFKHGIURP:KLWH6DQGVE\WKH86$UP\DQG *HQHUDO(OHFWULF&RPSDQ\*(WRDOWLWXGHVDVKLJKDVNPFDUU\LQJNJ RILQVWUXPHQWVDQGHOHFWURQLFVXSSRUWV\VWHPV)LJRQHZDVDOVRODXQFKHGDW VHD,QWKHKLJKHUIOLJKWVLQYHVWLJDWRUVZHUHDEOHWRPDNHEULHIPHDVXUHPHQWVRI WKHVSHFWUXPRIUDGLDWLRQIURPWKHVXQDQGRWKHUVWDUVLQZDYHOHQJWKVWKDWDUHQRU PDOO\DEVRUEHGE\(DUWK·VDWPRVSKHUH7KH\ZHUHDOVRDEOHWRPHDVXUHWKHZD\LQ ZKLFK(DUWK·VDWPRVSKHULFSURSHUWLHVFKDQJHGLQUHVSRQVHWRG\QDPLFSURFHVVHV RQWKHVXQWKURXJKRXWDQ\HDUVXQVSRWF\FOH 6WLOOWKHUHZDVRQHPDMRUGUDZEDFNWRWKH9DVDUHVHDUFKYHKLFOHLWGH SHQGHGRQFDUERQYDQHVLQLWVQR]]OHSOXVOLQNHGWDEVDWWKHWLSVRIDVHWRIIRXU IL[HGDHURG\QDPLFILQVIRUDWWLWXGHFRQWURO:KHQLWVHQJLQHVKXWGRZQDQGLW URVHDERYHWKHVWDELOL]LQJLQIOXHQFHRIWKHDWPRVSKHUHWKHURFNHWWHQGHGWRUROO XQFRQWUROODEO\ DERXW LWV ORQJLWXGLQDO D[LV DQG WKHQ WXPEOH HQG RYHU HQG 7KLV Fig. 1.6. Applied Physics Laboratory cosmic ray telescope in V-2 instrument section. 8 Sputnik, Explorer, and Vanguard Courtesy of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·VNJ7KH VHDOHYHO WKUXVW RI LWV WXUELQHIHG DOFRKROOLTXLG R[\JHQ HQJLQH IURP 5HDFWLRQ 0RWRUV,QFZDVN1DQGLWVEXUQLQJWLPHZDVVHF,WFDUULHGNJRI LQVWUXPHQWVWRDPD[LPXPDOWLWXGHRINP 7KHVHFRQGYHUVLRQRIWKH9LNLQJZDVPLQGLDPHWHUDQGPWDOODQG LWZHLJKHGNJ7KHVHDOHYHOWKUXVWRILWVWXUELQHIHGDOFRKROOLTXLGR[\JHQ HQJLQHIURP*(ZDVDOVRN1EXWLWVEXUQLQJWLPHZDVH[WHQGHGWRVHF Fig. 1.7. Richard Tousey with NRL V-2 sun-follower payload. The Historical Background 9 Courtesy of U.S. Army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ig. 1.8. Viking 2 (left) and Viking 9 (right) launches at White Sands Proving Ground. 10 Sputnik, Explorer, and Vanguard a) c) b) d) Fig. 1.9. Dual Aerobee launches at White Sands Missile Range (a), Richard Custer with Nike-Cajun rocket and HUGO payload at Wallops Island (b), Van Allen's Rockoon being launched from the icebreaker USS Eastwind (c), and Commander Gus Ebel, Carl McIwain, and Frank McDonald with a Loki rocket at sea (d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he Historical Background 11 Fig. 1.10. 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Vanguard TV-0 (Viking 13). The Historical Background 15 Courtesy of G. H. Ludwig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·VJUDGXDWHVWXGHQWZKRKDGEXLOWWKHRULJLQDO9DQJXDUGFRVPLF UD\H[SHULPHQWDVDPDVWHU·VWKHVLVSURMHFWDQGPRYHKLPWR-3/LQ3DVDGHQDWR PRGLI\KLV9DQJXDUGH[SHULPHQWDVQHFHVVDU\WRILWLQWRWKHQHZVDWHOOLWHZKLFK ZDV FDOOHG ´'HDO ,µ XS XQWLO WKH WLPH RI LWV ODXQFK DQG ´([SORUHU ,µ WKHUHDIWHU )LJ 3LFNHULQJ DOVR JRW SHUPLVVLRQ IURP 1HZHOO DW 15/ WR WUDQVIHU D 0LQLWUDFN VSDFHFUDIW WUDQVPLWWHU DQG UHFHLYHU WR WKH ([SORUHU SURJUDP³RWKHU ZLVHWKHUHZRXOGKDYHEHHQQRZD\WRPHDVXUHWKH([SORUHU,VDWHOOLWH·VRUELW Fig. 1.12. George H. Ludwig with the Deal I (Explorer I) instrument section at the University of Iowa. 16 Sputnik, Explorer, and Vanguard SUHFLVHO\VLQFHWKH-3/0LFURORFNWHOHPHWU\V\VWHPZDVQRWGHVLJQHGIRURUELW GHWHUPLQDWLRQ /XGZLJPRYHGWR3DVDGHQDDQGZRUNHGDVDMXQLRUHQJLQHHUDW-3/WRFRP SOHWH IDEULFDWLRQ LQWHJUDWLRQ DQG WHVWLQJ RI KLV FRVPLFUD\ H[SHULPHQW³MXVW LQWLPHWRVKLSWKHSDFNDJHWR&DSH&DQDYHUDOIRUODXQFK+HVWD\HGEHKLQGLQ 3DVDGHQDXQWLOWKHODVWSRVVLEOHPLQXWHWRFRPSOHWHVRPHFULWLFDOFDOLEUDWLRQVDQG DUULYHGDWWKH&DSHRQWKHGD\RIWKHODXQFK7RKLVVXUSULVHKHZDVQRWSHUPLWWHG WRHQWHUWKH$UP\EORFNKRXVHRUDQ\RIWKH-3/WHOHPHWU\UHFHLYLQJDUHDVWRPRQL WRU KLV LQVWUXPHQW·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·VIORRGOLJKWV :LWKWKLVKLVWRULFDOFRQWH[WLQPLQGZHWXUQQRZWRWKHVDWHOOLWHVWKHPVHOYHV 1.3 Sputnik I 6SXWQLN,ZDVODXQFKHGIURPWKH%DLNRQXUODXQFKFRPSOH[RQ2FWREHU,W ZDVSURSHOOHGE\DPRGLILHG5,&%0LQWRDQHOOLSWLFDORUELWLQFOLQHGGHJ WR(DUWK·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·VLQWHUQDOWHPSHUDWXUH7KHIDQZDV FRPPDQGHGRQE\DWKHUPRVWDWZKHQWKHWHPSHUDWXUHURVHDERYH&DQGWXUQHG RII ZKHQ LW GURSSHG EHORZ & 7KH PRGXODWLRQ VFKHPH IRU WKH VSDFHFUDIW·V WHOHPHWU\WUDQVPLWWHUFRQVLVWHGRIVHQGLQJRXWDQDOWHUQDWLQJVHULHVRISXOVHVRI VHFGXUDWLRQRQLWVWZRUDGLRIUHTXHQFLHVVRORQJDVWKHVSDFHFUDIW·VLQWHUQDO WHPSHUDWXUH ZDV EHWZHHQ & DQG & :KHQ WKH WHPSHUDWXUH H[FHHGHG WKDW UDQJHWKHSXOVHGXUDWLRQFKDQJHGRQERWKIUHTXHQFLHV7KHGXUDWLRQZDVDOVRGH VLJQHGWRFKDQJHLIWKHSUHVVXUHLQVLGHWKHVSDFHFUDIWGURSSHGEHORZRQHWKLUGRI Courtesy of NASA Sputnik I Fig. 1.13. Internal view of Sputnik I components. 17 18 Sputnik, Explorer, and Vanguard Courtesy of NASA DQDWPRVSKHUHWRLQGLFDWHWKDWLWVVKHOOKDGEHHQSXQFWXUHGE\DPHWHRULWH$YLHZ RIWKHVDWHOOLWH·VLQWHULRULVJLYHQLQ)LJ7KHRFWDJRQDOREMHFWVDUHWKHEDWWHU\ SDFNVWKHUDGLRWUDQVPLWWHUZDVPRXQWHGLQDFDYLW\LQWKHLUFHQWHU 6SXWQLN ,·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ig. 1.14. R-7 launch vehicle for Sputnik satellite. Sputnik I 19 ZHUHSXEOLFO\DQQRXQFHGDQGDPDWHXUUDGLRRSHUDWRUVDOORYHUWKHZRUOGVWDUWHG WXQLQJ LQWR WKH VLJQDOV DQG PHDVXULQJ WKHLU 'RSSOHU VKLIWV WR KHOS HVWLPDWH WKH VDWHOOLWH·VRUELW2SHUDWRUVRIDQHZO\LQVWDOOHG15/´IHQFHµRI0LQLWUDFNJURXQG VWDWLRQV ZKLFK KDG EHHQ LQVWDOOHG WR WUDFN XSFRPLQJ 9DQJXDUG VDWHOOLWHV RQ 0+]DOVRUHFRQILJXUHGWKHLUHTXLSPHQWWRUHFHLYH6SXWQLN·VIUHTXHQFLHVVR WKH\FRXOGPHDVXUHWKHVDWHOOLWH·VRUELWZLWKPXFKJUHDWHUSUHFLVLRQ 6SXWQLN,DOWKRXJKTXLWHVLPSOHZDVDFRPSOHWHWHFKQLFDOVXFFHVVSURYLQJ WKDWDQRUELWLQJVSDFHFUDIWFRXOGVXUYLYHLQWKHKRVWLOHHQYLURQPHQWRIVSDFHZLWK RXWEHLQJSXQFWXUHGE\PHWHRULWHVRUKDYLQJLWVYDFXXPWXEHHOHFWURQLFVGDPDJHG E\VRODURUFRVPLFUDGLDWLRQDERYHWKHVKLHOGLQJHIIHFWVRI(DUWK·VDWPRVSKHUH,W DOVRSURYHGWKDWWKHLQWHUQDOWHPSHUDWXUHRIDQRUELWLQJREMHFWFRXOGEHFRQWUROOHG ZLWKLQOLPLWVDFFHSWDEOHIRUVWDQGDUGHOHFWURQLFHTXLSPHQW,WUDGLRHGXVHIXOLQ WHUQDODQGVNLQWHPSHUDWXUHGDWDWRWKHJURXQGIRUWKUHHZHHNVEHIRUHLWVEDWWHULHV EHFDPHGHSOHWHGZKLOHLQWHUQDWLRQDOWHDPVRISK\VLFLVWVPHDVXUHGDOWHUDWLRQVLQ WKH SDWKV RI LWV UDGLR WUDQVPLVVLRQV WR GHWHUPLQH WKH GHQVLW\ RI LRQV LQ (DUWK·V XSSHUDWPRVSKHUH ,WZDVDOVRREVHUYHGRSWLFDOO\DWWZLOLJKWE\´0RRQZDWFKµYROXQWHHUVZKR KDGEHHQRUJDQL]HGLQWRWHDPVDOORYHUWKHZRUOGHDUOLHULQE\)UHG:KLSSOH RIWKH6PLWKVRQLDQ$VWURQRPLFDO2EVHUYDWRU\DW+DUYDUG8QLYHUVLW\7KHVHWHDPV XVHGDUUD\VRIVPDOOKRPHPDGHWHOHVFRSHVEXLOWWR:KLSSOH·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·VODXQFKYHKLFOHZKLFKZDVPORQJE\PLQGLDPHWHU DQGFRYHUHGZLWKVSHFLDOUHIOHFWRUVWRLQFUHDVHLWVYLVLELOLW\DVLWVZHSWDFURVVWKH VN\DWDQDPD]LQJUDWH0RVWRIWKHPHUURQHRXVO\WKRXJKWWKH\ZHUHVHHLQJWKH VDWHOOLWHLWVHOIKRZHYHUDWRQO\FPLQGLDPHWHULWFRXOGQ·WUHIOHFWHQRXJK VXQOLJKWWREHVHHQZLWKRXWDWHOHVFRSH6FLHQWLVWVDURXQGWKHZRUOGKHDSHGSUDLVH RQWKH6RYLHW8QLRQIRUDFKLHYLQJDQHQJLQHHULQJDQGVFLHQWLILFWULXPSK7KHPDQ LQWKHVWUHHWDQGWKHOHDGHUVRIWKH:HVWHUQQDWLRQVKRZHYHUZHUHFKLOOHGE\WKH WKRXJKWWKDWLIWKH6RYLHWVFRXOGRUELWDVSDFHFUDIWDURXQG(DUWKWKH\PXVWVXUHO\ EHDEOHWRODXQFKWKHUPRQXFOHDUZHDSRQVDQ\ZKHUHLQWKHZRUOG (YHQDIWHU6SXWQLN·VEDWWHULHVGLHG0RRQZDWFKWHDPVFRQWLQXHGWUDFNLQJWKH VDWHOOLWHDQGLWVURFNHWERG\7KH+DUYDUG0,7WHDPXVHGWKHDPDWHXUV·VLJKWLQJV WRFDOFXODWHWKHJUDGXDOVKULQNDJHRIWKHRUELWVFDXVHGE\DHURG\QDPLFGUDJ,Q WKLVPDQQHUWKH\ZHUHDEOHWRHVWLPDWHWKHGHQVLW\RIWKHXSSHUDWPRVSKHUHDWWKH YDULRXVDOWLWXGHVWKURXJKZKLFKWKHREMHFWVSDVVHG6SXWQLN,RUELWHG(DUWK WLPHVXQWLO-DQXDU\DWRWDORIGD\VDIWHULWVODXQFKEHIRUHGHVFHQGLQJ 20 Sputnik, Explorer, and Vanguard GHHS HQRXJK LQWR WKH XSSHU DWPRVSKHUH WR EHFRPH YDSRUL]HG E\ DHURG\QDPLF KHDWLQJ$IWHU6SXWQLNQRDGGLWLRQDOVPDOOVDWHOOLWHVZHUHIORZQE\WKH6RYLHWV ZKRLQVWHDGLQFUHDVHGWKHVL]HRIWKHLUODWHUVSDFHFUDIWHQRUPRXVO\ 1.4 Explorer I Courtesy of NASA ([SORUHU , )LJ ZDV ODXQFKHG IURP &DSH &DQDYHUDO RQ -DQXDU\ RQDIRXUVWDJH-XQR,ODXQFKYHKLFOHLQWRDQHOOLSWLFDORUELWLQFOLQHGGHJWR (DUWK·VHTXDWRUZLWKDSHULJHHRINPDQDSRJHHRINPDQGDQRUELWDO SHULRGRIPLQ 7KHODXQFKPDVVRIWKHVSDFHFUDIWZDVNJZKLFKLQFOXGHGNJRISD\ ORDGWKDWUHPDLQHGDWWDFKHGWRWKHNJF\OLQGULFDOVWHHOFDVLQJRILWVH[SHQGHG IRXUWKVWDJH6FDOH6HUJHDQWURFNHWPRWRU7KUHHVFLHQWLILFLQVWUXPHQWVZHUHLQFRU SRUDWHGLQWRWKHSD\ORDG7KHILUVWDVPHQWLRQHGSUHYLRXVO\ZDVWKH$QWRQ RPQLGLUHFWLRQDO*HLJHU0XHOOHUFRXQWHUEXLOWE\/XGZLJLWVSXUSRVHZDVWRPHD VXUHWKHLQWHQVLW\RIFRVPLFUDGLDWLRQDERYHWKHDWPRVSKHUHDQGGHILQHWKHH[WHQW RI(DUWK·VPDJQHWLFILHOG/XGZLJPDGHH[WHQVLYHXVHRIWUDQVLVWRUVLQKLVFLUFXLWV 7KHRWKHUWZRVFLHQWLILFLQVWUXPHQWVZHUHGHWHFWRUVEXLOWE\0DXULFH'XELQDQG (GZDUG0DQULQJRIWKH$LU)RUFH&DPEULGJH5HVHDUFK&HQWHUWRPHDVXUHWKHIUH TXHQF\DQGHQHUJ\GLVWULEXWLRQRIPHWHRULWHVDERYH(DUWK·VDWPRVSKHUH7KHILUVW Fig. 1.15. Explorer I instrument section being installed on Scale Sergeant fourth-stage motor. Explorer I 21 Courtesy of NASA GHWHFWRU HPSOR\HG D FU\VWDO WUDQVGXFHU DQG VROLGVWDWH DPSOLILHU WR DFRXVWLFDOO\ UHFRUGWKHHQHUJ\RIPHWHRULPSDFWV7KHVHFRQGZDVDZLUHJULGGHWHFWRUWKDW UHFRUGHGPLFURPHWHRULWHLPSDFWVE\WKHIUDFWXUHRIZLUHVLQLWVJULG The ([SORUHU,LQVWUXPHQWVHFWLRQFRQWDLQHGWZRWHOHPHWU\WUDQVPLWWHUV7KH ILUVWZDVDP:-3/0LFURORFNRSHUDWLQJRQ0+]DQGIHHGLQJDWXUQVWLOH DQWHQQDWKDWFRQVLVWHGRIIRXUIOH[LEOHVWHHOZLUHVHDFKFPORQJ7KHVHFRQG ZDVWKHP:0LQLWUDFNRULJLQDOO\EXLOWE\15/IRU9DQJXDUGRSHUDWLQJRQ 0+]DQGFRQQHFWHGWRWZRILEHUJODVVVORWDQWHQQDVLQWKHERG\RIWKH VDWHOOLWH$SDFNDJHRIPHUFXU\EDWWHULHVDQGSDFNDJHVRIFRQWUROHOHFWURQLFVZHUH DOVRFRQWDLQHGLQWKHSD\ORDG7KHVDWHOOLWH·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·VRUELWZLWKKLJKSUHFLVLRQ$IWHULWVEDW WHULHVZHUHGHSOHWHG([SORUHU,UHPDLQHGLQRUELWIRU\HDUVDQG0RRQZDWFK YROXQWHHUVFRQWLQXHGWRWUDFNLWWKURXJKVPDOOWHOHVFRSHV,QDGGLWLRQVSHFLDOO\ GHVLJQHG SURIHVVLRQDO %DNHU1XQQ WUDFNLQJ FDPHUDV ZHUH LQVWDOOHG DURXQG WKH ZRUOG QRW ORQJ DIWHU ([SORUHU , ZDV ODXQFKHG 7KHLU REVHUYDWLRQV DOORZHG WKH Fig. 1.16. Explorer I components and external shell. The cosmic ray experiment is mounted on the upper portion of the compartment, and the telemetry section, flexible antennas, and micrometeor detectors are mounted at the bottom. The white stripes are designed for thermal control of the spinning satellite. Sputnik, Explorer, and Vanguard Courtesy of U.S. Army/ Redstone Arsenal 22 Fig. 1.17. Night launch of Explorer I aboard the Juno I launch vehicle. +DUYDUG0,7 WHDP WR GHWHUPLQH WKH VDWHOOLWH·V RUELW PXFK PRUH SUHFLVHO\ WKDQ WKH\KDGEHHQDEOHWRGRXVLQJWKHYDOXHVFDOFXODWHGIURPWKHDPDWHXUVLJKWLQJV ([SORUHU ,·V ODXQFK YHKLFOH -XQR , ZDV P WDOO DQG P LQ GLDP HWHUDQGZHLJKHGNJ)LJ,WVILUVWVWDJHZDVDPRGLILHG5HGVWRQH FRQWDLQLQJRQH1RUWK$PHULFDQ5RFNHWG\QH$PRWRUWKDWXVHGOLTXLGR[\JHQ DVLWVR[LGL]HUDQGK\G\QHXQV\PPHWULFDOGLPHWK\OK\GUD]LQHDQGGL HWK\OHQHWU\DPLQHDVLWVIXHOWRJHQHUDWHN1RIWKUXVWIRUVHF,WVWKUHH XSSHUVWDJHVFRQVLVWHGRIFOXVWHUVRI6FDOH6HUJHDQWVROLGSURSHOODQWSRO\VXOILGH DOXPLQXPDPPRQLXPSHUFKORUDWHURFNHWVPRXQWHGLQD´VSLQEXFNHWµ)LJ WKDWZDVDWWDFKHGE\DEHDULQJWRWKHWRSRIWKH5HGVWRQHERRVWHUDQGURWDWHGDWD UDWHRIUSPE\DQHOHFWULFPRWRUWRSURYLGHJ\URVFRSLFVWDELOLW\WRWKHXSSHU VWDJHVDQGDYHUDJHRXWWKHLUQR]]OHPLVDOLJQPHQWVGXULQJWKUXVWLQJ ,WVVHFRQGVWDJHFRPSULVHGDFOXVWHURIHOHYHQFPGLDPHWHU6FDOH6HU JHDQWV WKDW ZHUH LJQLWHG VLPXOWDQHRXVO\ WR JHQHUDWH D N1 WRWDO WKUXVW IRU VHF ,WV WKLUG VWDJH FRQWDLQHG D FOXVWHU RI WKUHH VLPLODU 6FDOH 6HUJHDQWV WKDW 23 Courtesy of U.S. Army Explorer I Fig. 1.18. Upper-stage spin bucket on top of a modified Redstone first stage. JHQHUDWHGDWRWDORIN1IRUVHF,WVIRXUWKVWDJHZDVDVLQJOH6FDOH6HUJHDQW WKDWJHQHUDWHGN1IRUVHFDQGVWD\HGDWWDFKHGWRWKH([SORUHU,VDWHOOLWHLQ RUELW 6KRUWO\DIWHUDFKLHYLQJRUELW([SORUHU,DQGLWVDWWDFKHGIRXUWKVWDJHVWRSSHG VSLQQLQJDERXWLWVORQJLWXGLQDOD[LVDQGLQVWHDGWXPEOHGHQGRYHUHQGDVDUH VXOW RI D SKHQRPHQRQ ZHOO NQRZQ WR VRXQGLQJ URFNHW HQJLQHHUV RI WKDW HUD DV ´UROOSLWFKFRXSOLQJµ$ORQJVOHQGHUF\OLQGULFDOERG\VXFKDVWKHFRPELQHGVDW HOOLWHDQGURFNHWPRWRULVPRVWVWDEOHZKLOHURWDWLQJDERXWLWVWUDQVYHUVHD[LV,I DQDWWHPSWLVPDGHWRVSLQLWDERXWLWVORQJLWXGLQDOD[LVLQVWHDGDQ\DV\PPHWU\ LQLWVWUDQVYHUVHPDVVGLVWULEXWLRQZLOOFDXVHLWVVSLQHQHUJ\WREHFRPHFRXSOHG LQWRSLWFKHQHUJ\DQGLWZLOOSUHFHVVLQWRODUJHUDQGODUJHUFRQLQJDQJOHVXQWLODOO WKHHQHUJ\LVWUDQVIHUUHGLQWRLWVSLWFKPRGH7KHIOH[LEOHDQWHQQDVRQ([SORUHU ,VHUYHGDVWKHFRXSOLQJPHFKDQLVPLQWKLVFDVH7KHWXPEOLQJEHKDYLRUFDXVHG LQWHUPLWWHQWGURSRXWVLQWKHVDWHOOLWH·VGDWDWUDQVPLVVLRQVWRUHFHLYLQJVWDWLRQVRQ WKHJURXQGDQGFRPSOLFDWHGWKHDQDO\VLVRIPHDVXUHPHQWVPDGHE\LWVLQVWUXPHQWV 24 Sputnik, Explorer, and Vanguard Courtesy of C. McIlwain )XUWKHUFRPSOLFDWLQJWKHDQDO\VLVZDVWKHIDFWWKDWWHOHPHWHUHGGDWDZHUHUH FHLYHGIURPLWVLQVWUXPHQWVIRURQO\WKHIHZPLQXWHVGXULQJHDFKRUELWZKHQWKH VDWHOOLWHZDVSDVVLQJRYHUDQ\RIWKH0LFURORFNRU0LQLWUDFNUHFHLYHUVRQWKHJURXQG ,QVSLWHRIWKHVHOLPLWDWLRQVWKH$LU)RUFH&DPEULGJH5HVHDUFK&HQWHUVFLHQWLVWVGH GXFHGWKDWWKHLUPLFURPHWHRULWHDFRXVWLFGHWHFWRUUHSRUWHGKLWVRIFRVPLFGXVWLQ DGD\SHULRGZKLFKHTXDWHVWRDQLPSDFWUDWHRIðïP2ïVHF 7KHVDWHOOLWH·VHFFHQWULFRUELWFRXSOHGZLWK(DUWK·VURWDWLRQFDXVHGLWVEULHI SHULRGVRIGDWDWUDQVPLVVLRQWRWKH0LFURORFNVWDWLRQVWRRFFXUZKHQWKHVDWHOOLWH ZDV DW YDU\LQJ DOWLWXGHV UDQJLQJ IURP NP WR NP:KHQ WKH VDWHOOLWH ZDVSDVVLQJRYHUDUHFHLYLQJVWDWLRQDWDOWLWXGHVQHDUSHULJHHRUXSWRNP RUVRWKH*HLJHU0XHOOHUFRXQWLQJUDWHVUHPDLQHGLQWKHH[SHFWHGUDQJHLQFUHDV LQJ VWHDGLO\ ZLWK DOWLWXGH³EXW ZKHQ WKH VDWHOOLWH ZDV DW KLJKHU DOWLWXGHV WKH FRXQWLQJUDWHVGURSSHGWR]HUR7KLVXQH[SHFWHGEHKDYLRUFDXVHG9DQ$OOHQDQG /XGZLJWRVXVSHFWWKDWWKHLQVWUXPHQWPLJKWEHIDLOLQJLQWHUPLWWHQWO\+RZHYHU Fig. 1.19. Iowa graduate student Carl E. McIlwain with the cosmic ray experiment that he flew on a Nike-Cajun rocket from Ft. Churchill, Canada, into an auroral substorm at about the same time that Explorer I flew. His analysis of the flux of energetic particles detected on his Nike-Cajun flight allowed him to explain to Van Allen why the Explorer I Geiger counter saturated. Vanguard 1 25 &DUO0F,OZDLQDQRWKHURI9DQ$OOHQ·VJUDGXDWHVWXGHQWVKDGUHFHQWO\UHWXUQHG IURPODXQFKLQJDQLQVWUXPHQWHGFRVPLFUD\SD\ORDG)LJRQD1LNH&DMXQ VRXQGLQJURFNHWLQWRDQDFWLYHDXURUDDW&DQDGD·V)W&KXUFKLOO/DXQFK5DQJHRQ WKHVKRUHRI+XGVRQ·V%D\DQGKHUHSRUWHGWKDWKLVLQVWUXPHQWKDGHQFRXQWHUHG XQXVXDOO\ODUJHIOX[HVRIHQHUJHWLFSDUWLFOHVDERYHWKHDWPRVSKHUHDWKLJKJHR PDJQHWLFODWLWXGHV+LVLQWHUSUHWDWLRQRIWKHFRQIXVLQJUHVXOWVIURPWKH([SORUHU ,LQVWUXPHQWZDVWKDWLWZDVEHLQJRYHUZKHOPHGE\DKXJHIOX[RIHQHUJHWLFSDU WLFOHVDWWKHVDWHOOLWH·VKLJKHUDOWLWXGHVWKDWZDVGULYLQJLWV*HLJHUWXEHLQWRVXFK KDUGVDWXUDWLRQWKDWLWGLGQRWFRXQWDWDOO9DQ$OOHQDQG/XGZLJDJUHHGZLWKWKDW LQWHUSUHWDWLRQDQGFKDQJHGWKHFRXQWLQJUDWHRIWKHLUQH[WLQVWUXPHQW 1.5 Vanguard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ig. 1.20. Vanguard 1 during final installation and checkout on its TV-4 launch vehicle. 26 Sputnik, Explorer, and Vanguard Courtesy of NASA 2Q0DUFKVL[ZHHNVDIWHUWKHVXFFHVVIXOODXQFKRI([SORUHU,WKH 9DQJXDUGVDWHOOLWH)LJZDVVXFFHVVIXOO\ODXQFKHGIURPWKH&DSH&DQDY HUDO$LU)RUFH6WDWLRQRQDWKUHHVWDJH9DQJXDUGODXQFKYHKLFOH)LJLQWR DQHOOLSWLFDORUELWLQFOLQHGGHJWR(DUWK·VHTXDWRUZLWKDQLQLWLDOSHULJHH RINPDQDSRJHHRINPDQGDQRUELWDOSHULRGRIPLQ7KHODXQFK YHKLFOHZDVGHVLJQDWHG79 7KHODXQFKRIWKH9DQJXDUGVDWHOOLWHZDVXVHGWRYHULI\WKHSHUIRUPDQFHRI WKHODXQFKYHKLFOHDQGWRGHILQHWKHHQYLURQPHQWLQZKLFKIXWXUHVLEOLQJVZRXOG EH H[SHFWHG WR RSHUDWH 9DQJXDUG ZDV VSKHULFDO LQ VKDSH FP LQ GLDP HWHUDQGZHLJKHGNJ,WVH[WHULRUVKHOOZDVPDGHIURPWZRVSXQDOXPLQXP KHPLVSKHUHVFRDWHGZLWKDOWHUQDWLQJOD\HUVRIVLOLFRQGLR[LGHDQGDOXPLQXPIRU WKHUPDOFRQWURODQGLWKRXVHGDF\OLQGULFDODOXPLQXPLQVWUXPHQWFRPSDUWPHQW Fig. 1.21. Successful launch of Vanguard 1 on 17 March 1958. Vanguard 1 27 FPLQGLDPHWHUWKDWZDVVXVSHQGHGZLWKLQWKHFUDIWE\7HIORQURGVWKDWVHUYHG DV HOHFWULFDO DQG WKHUPDO LQVXODWRUV )LJ 7KH LQVWUXPHQW FRPSDUWPHQW FRQWDLQHGWZRUDGLRWHOHPHWU\WUDQVPLWWHUVRQHRIZKLFKZDVSRZHUHGE\VHYHQ 0DOORU\9PHUFXU\FHOOVDQGUDGLDWHGDP:VLJQDORQ0+])LJ 7KHRWKHUZDVSRZHUHGE\VL[DUUD\VRIJODVVFRYHUHGVLOLFRQVRODUFHOOV WKDWZHUHPRXQWHGLQVTXDUHDOXPLQXPIUDPHVRQWKHVDWHOOLWH·VH[WHUQDOVKHOODQG UDGLDWHGDP:VLJQDODW0+] 7KH TXDUW] FU\VWDOV WKDW GURYH WKH RVFLOODWRUV LQ WKH WHOHPHWU\ WUDQVPLWWHUV ZHUHWKHUPDOO\VHQVLWLYHDQGWKLVSURSHUW\ZDVHPSOR\HGWRPHDVXUHWKHLQWHUQDO WHPSHUDWXUHVRIWKHVDWHOOLWHDQGLWVWKHUPDOO\LVRODWHGF\OLQGULFDOLQVWUXPHQWSDFN DJH7KH0+]WUDQVPLWWHUIHGIRXULQORQJFLUFXODUO\SRODUL]HGULJLG DOXPLQXPVWXEDQWHQQDVWKDWZHUHHOHFWULFDOO\ORDGHGWRSHUIRUPDVTXDUWHUZDYH Fig. 1.22. Dave Corbin assembling Vanguard 1 satellite. 28 Sputnik, Explorer, and Vanguard Fig. 1.23. Vanguard 1 battery-operated transmitter. DQWHQQDVDWWKHLUWUDQVPLWWHU·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anguard 1 Navy Electronics Laboratory San Diego,California 29 Blossom Point, Maryland Ft. Stewart, Georgia Batista Field, Havana, Cuba Coolidge Field,Antigua Island Mt. Cotopaxi,Quito, Equador Ancon, Lima, Peru Antafagasto, Chile Peldehue Military Reservation, Santiago, Chile Fig. 1.24. Minitrack antenna dipole feed (top). Typical segment of a Minitrack interferometer antenna array (middle). Minitrack locations in the Western hemisphere (bottom). 30 Sputnik, Explorer, and Vanguard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·V EDWWHU\SRZHUHG WUDQVPLWWHU SURYLGHG LQWHUQDO SDFNDJH WHP SHUDWXUH IRU GD\V DQG VHQW WUDFNLQJ VLJQDOV IRU GD\V ,WV VRODUSRZHUHG WUDQVPLWWHU SURYLGHG PHDVXUHPHQWV RI WKH WHPSHUDWXUH RI WKH LQVLGH VXUIDFH RI WKHVDWHOOLWH·VH[WHUQDOVKHOODQGVHQWWUDFNLQJVLJQDOVIRUPRUHWKDQVL[\HDUVDQG RUELWV9DQJXDUGDQGLWVWKLUGVWDJHPRWRUDUHVWLOORUELWLQJ(DUWKDVRI WKLVZULWLQJDQGDUHH[SHFWHGWRGRVRIRUDQRWKHU\HDUVRUVR7KHVDWHOOLWH·V UDGLRWUDQVPLVVLRQVZHUHHPSOR\HGE\JHRSK\VLFLVWVGXULQJVL[\HDUVRIUHSHDWHG PHDVXUHPHQWV WR GHWHUPLQH WKH GHWDLOHG SHDU VKDSH RI (DUWK DQG HVWDEOLVK WKH ORFDWLRQVRIWKHFRQWLQHQWVDQGWKHPDVVFRQFHQWUDWLRQVLQYDULRXVUHJLRQVRIWKH SODQHWDVZHOODVWKHGHQVLW\RIQHXWUDOJDVHVDQGLRQVLQWKHXSSHUDWPRVSKHUH WRJUHDWSUHFLVLRQ7KHVSKHULFDOVKDSHRIWKH9DQJXDUGVDWHOOLWHUHVXOWVLQORZHU VFDWWHULQLWVWUDFNLQJGDWDWKDQGLGWKHWXPEOLQJF\OLQGULFDO([SORUHU,EHFDXVH WKHGUDJFRHIILFLHQWRIDVSKHUHLVLQGHSHQGHQWRIRULHQWDWLRQ&RQWLQXHGRSWLFDO Fig. 1.25. Aerobee Hi in hangar with payload exposed. Additional Sputnik Launches 31 DQGODWHUUDGDUWUDFNLQJRI9DQJXDUGGXULQJWKHQHDUO\ILYHFRPSOHWH\HDU VRODUF\FOHVWKDWKDYHWDNHQSODFHVLQFHLWVODXQFKKDVIXUWKHUUHILQHGRXUNQRZO HGJHRIWKHHIIHFWVRIH[WUHPH89UDGLDWLRQIURPVRODUIODUHVRQWKHGHQVLW\RI WKHXSSHUDWPRVSKHUHDQGWKHZD\WKDWWKLVGHQVLW\YDULDELOLW\LQIOXHQFHVVDWHOOLWH RUELWV 1.6 Additional Sputnik Launches $ IHZ GD\V DIWHU 6SXWQLN ,·V ODXQFK 6RYLHW 3UHPLHU 1LNLWD .UXVKFKHY JUHDWO\ SOHDVHG E\ WKH RYHUZKHOPLQJ LQWHUQDWLRQDO DFFODLP IRU KLV QDWLRQ·V SLRQHHULQJ DFKLHYHPHQW LQ ODXQFKLQJ WKH ZRUOG·V ILUVW DUWLILFLDO VDWHOOLWH GLUHFWHG .RUROHY WRSXWLQWRRUELWDQRWKHUHYHQPRUHLPSUHVVLYHVDWHOOLWHGHVLJQDWHG6SXWQLN,, WRFHOHEUDWHWKHWKDQQLYHUVDU\RIWKH6RYLHWUHYROXWLRQRQ1RYHPEHU,QWKH DVWRQLVKLQJO\VKRUWWLPHVSDQRIDIHZZHHNV.RUROHY·VWHDPWRRNWKHEDFNXSVDW HOOLWHIRUWKH6SXWQLN,ODXQFKDQGLQVWDOOHGLWLQDWKUHHSDUWSD\ORDG)LJ 7KHVHFRQGSDUWZDVDQDOXPLQXPVHOIFRQWDLQHGKHUPHWLFDOO\VHDOHGOLIHVXS SRUWFDSVXOHWKDWFRQWDLQHGDVPDOOGRJQDPHG/DLND´%DUNHUµLQ(QJOLVK7KH WHPSHUDWXUHRIWKHFDSVXOHZDVUHJXODWHGE\DFRPELQDWLRQRIUHIOHFWLYLW\RIWKH VSDFHFUDIW·V H[WHUQDOVXUIDFHV WKHUPDOLQVXODWLQJEODQNHWVDQGDIRUFHGDLUFLU FXODWLQJ V\VWHP 7KH WHDP WDSHG LQVWUXPHQWV WR WKH GRJ WR PHDVXUH KHU SXOVH Fig. 1.26. Sputnik II three-part payload, with science instrument package on top, spherical Sputnik I type shell below that, and Laika the dog's capsule on the bottom. 32 Sputnik, Explorer, and Vanguard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ð NPRUELWZLWKDGHJLQFOLQDWLRQ,WVRUELWDOSHULRGZDVPLQ7KHVSKHUL FDOFDSVXOHWKDWKDGEHHQDEDFNXSVDWHOOLWHIRUWKH6SXWQLN,PLVVLRQVHUYHGDVWKH GDWDWUDQVPLVVLRQV\VWHPIRUWKHFRPELQHG6SXWQLN,,SD\ORDG,WV0+]WUDQV PLWWHUSURYLGHGWKHVDPHVHULHVRIEHHSVWKDWLWVSUHGHFHVVRUKDGEXWLWV0+] WUDQVPLWWHUJHQHUDWHGDFRQWLQXRXVVLJQDOWKDWZDVFRPPXWDWHGWRUHOD\WKHPXFK ODUJHUGDWDVHWRIWKH6SXWQLN,,PLVVLRQWRWKHJURXQGVWDWLRQV )ROORZLQJDVXFFHVVIXOODXQFKWKHODXQFKYHKLFOH·VQRVHFRQHZKLFKSUR WHFWHGWKHWULSOHVWDFNRIFDSVXOHVGXULQJDVFHQWVHSDUDWHGRQVFKHGXOHEXWDOD\HU RIWKHUPDOLQVXODWLRQZDVWRUQORRVHLQWKHSURFHVV3RVWIOLJKWWHOHPHWU\DQDO\VLV UHYHDOHG WKDW /DLND VXUYLYHG WKH HIIHFWV RI ODXQFK EXW GLHG D IHZ KRXUV DIWHU ZDUG IURP WKH ORVV RI WHPSHUDWXUH FRQWURO LQ KHU FDSVXOH³D IDFW WKDW ZDV QRW DQQRXQFHGWRWKHSXEOLFXQWLOGHFDGHVODWHU6SXWQLN,,·VVFLHQWLILFLQVWUXPHQWVDQG WHOHPHWU\V\VWHPFRQWLQXHGWRRSHUDWHIRUVHYHQGD\VXQWLOWKHLUEDWWHULHVZHUH H[KDXVWHG7KH0RRQZDWFKQHWZRUNDQG%DNHU1XQQFDPHUDVSURYLGHGRSWLFDO PHDVXUHPHQWV RI 6SXWQLN ,,·V RUELW XQWLO LW EXUQHG XS LQ WKH DWPRVSKHUH RQ $SULODOLWWOHPRUHWKDQILYHPRQWKVDIWHUODXQFK 7KH 6RYLHWV KDG EHHQ SUHSDULQJ DQ HQRUPRXV SD\ORDG ZKLFK .RUROHY UH IHUUHGWRDVWKH´2EMHFW'µVSDFHFUDIWIRUPDQ\PRQWKVEXWKDGQRWEHHQDEOH WRFRPSOHWHLWXQWLODIWHU6SXWQLN,DQG,,KDGEHHQIORZQ,WZDVILQDOO\ODXQFKHG IURP%DLNRQXURQ$SULO+RZHYHULWIDLOHGWRUHDFKRUELWGXHWRDEUHDN XSRILWV5ODXQFKYHKLFOHVHFDIWHULJQLWLRQ8QGHWHUUHGE\WKLVIDLOXUHWKH 6RYLHWWHDPLQVWDOOHGDEDFNXS2EMHFW'VSDFHFUDIWRQDQRWKHU5DQGVXFFHVV IXOO\VHQWLWLQWRDð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dditional Explorer Launches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dditional Explorer Launches Courtesy of George H. Ludwig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ig. 1.27. Henry Richter of JPL (left) and Iowa graduate student George H. Ludwig with prototype equipment for the Explorer II cosmic ray experiment, which added a tape recorder to the basic Explorer I package. The satellite failed to reach orbit, but an identical payload was flown successfully on the Explorer III mission on 26 March 1958. 34 Sputnik, Explorer, and Vanguard VXFFHVVIXO ODXQFKHV 7KH\ DOVR XVHG 5RPDQ QXPHUDOV LQ WKHLU WLWOHV ZKLOH WKH 9DQJXDUGSURJUDPXVHG$UDELF $GXSOLFDWHSD\ORDGZDVSUHSDUHGDQGODXQFKHGVXFFHVVIXOO\DV([SORUHU,,, RQ0DUFKRQHZHHNDIWHUWKHVWDUWRIWKHILUVWVXFFHVVIXO9DQJXDUGPLV VLRQ ([SORUHU ,,,·V LQLWLDO SHULJHH ZDV NP LWV DSRJHH ZDV NP DQG LWV RUELWDO LQFOLQDWLRQ ZDV GHJ /XGZLJ·V WDSH UHFRUGHU DQG WKH 0LQLWUDFN WUDFNLQJV\VWHPZRUNHGIODZOHVVO\DQG9DQ$OOHQZDVDEOHWRSHUFHLYHDSDWWHUQ LQWKHSX]]OLQJ´]HURFRXQWµEHKDYLRURIKLVFRVPLFUD\LQVWUXPHQW+LVJUDGX DWH VWXGHQW 0F,OZDLQ H[SRVHG D *HLJHU FRXQWHU LGHQWLFDO WR WKH RQH IO\LQJ LQ ([SORUHU,,,WRDN9[UD\PDFKLQHLQKLVODERUDWRU\DQGSURGXFHGDGDWDVHW WKDWPDWFKHGWKHVORSHRIFRXQWLQJUDWHVIURPWKH*HLJHUWXEHLQRUELW+HSURYHG WKDWIOX[HVWKDWZRXOGLGHDOO\SURGXFHPRUHWKDQFRXQWVSHUVHFRQGLQVWHDG GURYHWKHFRXQWUDWHWR]HUR7KH9DQ$OOHQWHDPWKHUHIRUHFRQFOXGHGWKDWWHOHPH WHUHGGDWDIURPWKH([SORUHU,,,PLVVLRQLQGLFDWHGDQHQRUPRXVEDQGRIWUDSSHG HQHUJHWLFSDUWLFOHVFLUFOHG(DUWKDWDOWLWXGHVKLJKHUWKDQNPDQGWKDWWKHVKDSH Fig. 1.28. A Juno II rocket. Additional Explorer Launches 35 RIWKHEDQGZDVDIXQFWLRQRI(DUWK·VPDJQHWLFILHOG9DQ$OOHQDQQRXQFHGWKLV GLVFRYHU\WRWKHZRUOGDWDMRLQWVHVVLRQRIWKH$PHULFDQ3K\VLFDO6RFLHW\DQGWKH 1DWLRQDO$FDGHP\RI6FLHQFHVLQ:DVKLQJWRQ'&RQ0D\7KLVUHJLRQ VXEVHTXHQWO\EHFDPHNQRZQDVWKHLQQHURIWZR´9DQ$OOHQUDGLDWLRQEHOWVµ 7KHQH[WVDWHOOLWHLQWKHVHULHV([SORUHU,9ZDVSURSHOOHGLQWRDPXFKPRUH KLJKO\LQFOLQHGRUELWWKDQXVXDOE\D-XQR,ODXQFKYHKLFOHRQ-XO\,WV REMHFWLYHVZHUHWRH[WHQGLWVPHDVXUHPHQWVRYHUDPXFKEURDGHUODWLWXGHUDQJH RIWKHWUDSSHGSDUWLFOHUDGLDWLRQEHOWWKDWKDGEHHQGLVFRYHUHGRQWKHSUHYLRXV([ SORUHUIOLJKWVDQGWRPHDVXUHWKHHIIHFWVRQWKDWQDWXUDOUDGLDWLRQEHOWRIWKHWKUHH NW:´$UJXVµQXFOHDUGHYLFHVWKDWZHUHGHWRQDWHGDERYHWKHDWPRVSKHUH LQ DQ H[SHULPHQW FRQGXFWHG E\ WKH 86 $GYDQFHG 5HVHDUFK 3URMHFWV $JHQF\ $53$([SORUHU,9·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ig. 1.29. The Explorer VI satellite. 36 Sputnik, Explorer, and Vanguard WKDWDQDJUHHPHQWZDVPDGHWRH[WHQGWKHFRRUGLQDWHGZRUOGZLGHUHVHDUFKIRUDQ DGGLWLRQDO\HDU $WWKLVSRLQWDQHZ-XQR,,ODXQFKYHKLFOH)LJZDVGHYHORSHGFRQVLVW LQJRIWKHVXEVWLWXWLRQRIDPXFKODUJHU-XSLWHU,5%0IRUWKHPRGLILHG5HGVWRQH or -XSLWHU&ILUVWVWDJHWKDWZDVXVHGLQWKH-XQR,$GRXEOHWUXQFDWHGFRQLFDO ([SORUHUVSDFHFUDIWZLWKDPDVVRINJZDVODXQFKHGRQWKHILUVW-XQR,,RQ -XO\EXWDIDLOXUHRIWKHJXLGDQFHLQYHUWHUFDXVHGWKHYHKLFOHWR\DZVKDUSO\ DQGEUHDNXSVRPHVHFDIWHUOLIWRII ([SORUHU9, )LJ ZDV D VPDOO VSKHURLGDO VDWHOOLWH GHVLJQHG WR VWXG\ WUDSSHGUDGLDWLRQRIYDULRXVHQHUJLHVJDODFWLFFRVPLFUD\VJHRPDJQHWLVPUDGLR SURSDJDWLRQLQWKHXSSHUDWPRVSKHUHDQGWKHIOX[RIPLFURPHWHRULWHV,WDOVRWHVW HGDVFDQQLQJGHYLFHIRUSKRWRJUDSKLQJ(DUWK·VFORXGFRYHUDQGLWWUDQVPLWWHGWKH ILUVWWHOHYLVHGLPDJHVRI(DUWKIURPRUELW7KHVDWHOOLWHZDVODXQFKHGRQ$XJXVW DERDUGD7KRU'0$EOH,,,ODXQFKHUWKDWFRQVLVWHGRIDPLOLWDU\7KRU ,5%0DVDILUVWVWDJHDQGWKHWRSWZRVWDJHVRIWKH9DQJXDUGODXQFKYHKLFOHDV Fig. 1.30. The Thor Able III launch vehicle. Additional Explorer Launches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ig. 1.31. The Explorer VII satellite. 38 Sputnik, Explorer, and Vanguard WKDWUHTXLUHGWRPDLQWDLQWKHVDWHOOLWHHTXLSPHQW7KHVDWHOOLWH·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dditional Vanguard Launches ,QDGGLWLRQWRWKH9DQJXDUGHQJLQHHULQJWHVWVDWHOOLWHVHYHUDOIXOOVFDOHIXOO\ LQVWUXPHQWHGFPGLDPHWHUVFLHQWLILFVSDFHFUDIWZHUHSUHSDUHGE\15/)LJ ,QDGGLWLRQWRWKHQRUPDO0LQLWUDFNWHOHPHWU\DQGWUDFNLQJWUDQVPLWWHUDQG UHFHLYHU WKH ILUVW RQH RI WKHP FRQWDLQHG SKRWRQ FRXQWHUV GHVLJQHG E\ +HUEHUW )ULHGPDQDQGKLVWHDPLQWKH15/(OHFWURQ2SWLFV%UDQFKWRPHDVXUHWKH[UD\ VSHFWUXPRIWKHVXQLQWKHcEDQGZKLOHDVHFRQGDQGWKLUGVDWHOOLWHFRQWDLQHG VLPLODUSKRWRQFRXQWHUVWRPHDVXUHWKHVRODUVSHFWUXPLQWKH²cEDQG $OOWKUHHSD\ORDGVDOVRFRQWDLQHGGHYLFHVWRPRQLWRUWKHVSDFHHQYLURQPHQW(DFK VSDFHFUDIWZHLJKHGNJ 7KH ILUVW RI WKHVH VSDFHFUDIW ZDV ODXQFKHG RQ9DQJXDUG79 RQ $SULO 7KHIOLJKWZDVQRUPDOWKURXJKVHFRQGVWDJHEXUQLQJEXWWKHVHFRQGVWDJH VKXWGRZQ VHTXHQFH ZDV QRW FRPSOHWHG HOHFWULFDOO\ VR WKH WKLUG VWDJH ZDV QRW SURSHUO\VHSDUDWHGDQGILUHG7KHVSDFHFUDIWGLGQRWDFKLHYHRUELW 7KHVHFRQGRIWKHVFLHQWLILFVSDFHFUDIWZDVODXQFKHGRQ0D\RQWKH ILUVWSURGXFWLRQ9DQJXDUGODXQFKYHKLFOHGHVLJQDWHG6DWHOOLWH/DXQFK9HKLFOH or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·VHQHUJ\EXGJHW (DFKRIWKHVHVDWHOOLWHVZHLJKHGNJ7KHILUVWZDVODXQFKHGRQ6/9RQ -XQHEXWIDLOHGWRDFKLHYHRUELWEHFDXVHRIDVOLJKWXQGHUSHUIRUPDQFHRIWKH ODXQFKYHKLFOH·VVHFRQGVWDJHHQJLQHZKLFKUHVXOWHGLQWKHVDWHOOLWHEHLQJ PVHFVKRUWRILWVUHTXLUHGRUELWDOYHORFLW\RIPVHF7KHVHFRQG)LJ 39 Courtesy of NASA Additional Vanguard Launches Fig. 1.32. Transparent view of 51 cm Vanguard satellite interior. DFKLHYHGRUELWRQ6/9RQ)HEUXDU\DQGZDVGHVLJQDWHG9DQJXDUG,WV LQLWLDORUELWKDGDSHULJHHRINPDQGDQDSRJHHRINP,WZDVWKHSDWK ILQGHUIRUWKHKLJKO\VXFFHVVIXO7,526ZHDWKHUVDWHOOLWHVWKDWIROORZHGLQWKHQH[W GHFDGH9DQJXDUGDQGLWVNJWKLUGVWDJHPRWRUFDVHDUHVWLOOLQRUELWWRGD\ 7KH1DWLRQDO$HURQDXWLFVDQG6SDFH$GPLQLVWUDWLRQ1$6$KDGEHHQFUHDWHGRQ -XO\VRDOWKRXJKWKHVDWHOOLWHZDVEXLOWE\15/WKHPLVVLRQLVUHFRUGHG as a 1$6$VXFFHVV 7KHQH[WLQWKHVHULHVRI9DQJXDUGVFLHQFHVSDFHFUDIWFRQWDLQHGDSURWRQSUH FHVVLRQDOPDJQHWRPHWHUH[SHULPHQWEXLOWE\-DPHV+HSSQHURULJLQDOO\RI15/ DQGODWHURIWKH1$6$*RGGDUG6SDFH)OLJKW&HQWHU,WZDVGHVLJQHGWRVXUYH\ (DUWK·VPDJQHWLFILHOGDQGWRGHWHUPLQHZKHWKHUWKHSUHGLFWHG6WRUPHU&KDSPDQ ULQJFXUUHQWH[LVWHG,WVH[WHUQDOFRQILJXUDWLRQFRQVLVWHGRIDPDJQHVLXPKHPL VSKHUHFPLQGLDPHWHUDQGDPDWFKLQJILEHUJODVVKHPLVSKHUHZLWKDILEHUJODVV FRQH WKDW FRQWDLQHG WKH PDJQHWRPHWHU SURWUXGLQJ RXW LWV WRS $Q LQIODWDEOH Sputnik, Explorer, and Vanguard Courtesy of NASA 40 Fig. 1.33. 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Goddard and the Birth of the Space Age+\SHULRQ 1HZ<RUN 0%LOOHDQG(/LVKRFNThe First Space Race, Launching the World’s First Satellites 7H[DV$08QLYHUVLW\3UHVV&ROOHJH6WDWLRQ7; *+/XGZLJThe First Explorer SatellitesSUHSDUHGIRU-DPHV9DQ$OOHQ·VWKELUWK GD\FHOHEUDWLRQDWWKH8QLYHUVLW\RI,RZD2FW 5(DVWRQDQG09RWDZVanguard I, Proposal, Installation, Launch and Selected ResultsSULYDWHO\SXEOLVKHG 5LFKDUG(DVWRQ´7,0$7,21DQGWKH*36²µQuest, the History of Spaceflight Quarterly14 SS² $)RHUVWQHUJames Van Allen, the First Eight Billion Miles8QLYHUVLW\RI,RZD3UHVV ,RZD&LW\ 0-1HXIHOGVon Braun, Dreamer of Space, Engineer of War6PLWKVRQLDQ,QVWLWXWLRQ $OIUHG$ .QRSI 1HZ <RUN LQ DVVRFLDWLRQ ZLWK WKH 1DWLRQDO$LU DQG 6SDFH 0XVHXP 6PLWKVRQLDQ,QVWLWXWLRQ :30F&UD\Keep Watching the Skies! The Story of Operation Moonwatch and the Dawn of the Space Age3ULQFHWRQ8QLYHUVLW\3UHVV
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