Transmitting Data at 77 Mbps above the horizon LLCD
Transcription
Transmitting Data at 77 Mbps above the horizon LLCD
LLCD Accomplishments – No Issues with Atmospheric Effects like Fading and Turbulence Transmitting Data at 77 Mbps < 5° above the horizon LLCD Accomplishments – Streaming HD Video and Delivering Useful Scientific Data from LADEE to Earth Real LADEE Science Data and Telemetry Transmitted via LLCD Link resumes / “lost bundles” received Link Outage Good Link and bundle delivery Disruption-Tolerant Networking (DTN) Demo on LLCD Delivers File “Bundles” after Brief Cloud Outage 3 UNCLASSIFIED SCaN’s Laser Communications Program: Next Steps DEEP SPACE OPTICAL COMMUNICATIONS Deep-Space Optical Communications (DSOC) from Mars Overview, Capabilities and Footprint Spacecraft Flight Laser Transceiver (FLT) 4W, 22 cm dia. 1550 nm Beacon & Uplink 1030 nm 292 kb/s @ 0.4 AU CBE MASS (kg) 28 Mass margin (%) 30 CBE POWER (W) 76 Power Margin (%) 31 Optical Head: 45 x 45 x 49 cm Performance using 4W average laser power w/22 cm flight transceiver to 5m ground telescope (95E3 cc) Elect. Box: 29 x 23 x 23 cm (15E3 cc) Ground Laser Transmitter (GLT) Table Mtn., CA 5kW, 1m-dia. Telescope Ground Laser Receiver (GLR) Palomar Mtn., CA 5m-dia. Hale Telescope Deep Space Network (DSN ) Optical Comm Ops Ctr. JPL, Pasadena, CA TBD MOC This document has been reviewed and determined not to contain export controlled technical data. 5 Optical Comm for the Mars 2020 Rover • • • • • • Optical Terminal will support dual links: “Proximity” link, to optical terminal on orbiter (20 Mb/s max) Direct-To-Earth link (200 kb/s max, from 0.5 AU) Optical Aperture Diameter: 5 cm Average Laser Power: 1 W DC Power Consumption: 50 W Mass: 5.7 kg Volume: 4.6 liters 173 mm Rover Optical Terminal 159 mm 6 SCaN’s Laser Communications Program: Next Steps NEAR-EARTH OPTICAL COMMUNICATIONS Laser Communication Relay Demonstration (LCRD) Mission for 2018 • • • • 8 Commercial Spacecraft Host Flight Payload – Two LLCD-based Optical M odules and Contr oller Electr onics M odules – Two Differential Phase Shift Keying (DPSK) M odems with BW > 1 .2 5 Gbps (user rate) – High Speed Electronics to interconnect the two terminals, per for m data pr ocessing, and to inter face with the host spacecr aft Two Optical Communications Ground Stations – Upgr aded JPL Optical Communications Telescope Labor ator y (Table M ountain, CA) – Upgr aded LLCD Lunar Laser Gr ound Ter minal (W hite Sands, NM ) LCRD M ission Operations Center – 2 to 5 year s of oper ational networ k exper iments 8 SCaN’s Laser Communications Program: Next Steps TECHNOLOGY DEVELOPMENT EFFORTS G. Moore’s “Crossing the Chasm” Model for High-Tech Markets “Pragmatists” Each group has different expectations for a new, disruptive product: Innovators see a competitive advantage to allow them to leapfrog their competition… …While Pragmatists want a COMPLETE SOLUTION to a business problem (the Whole Product Model) 10 The Whole Product Model for Infusing Optical Comm into NASA Missions Compliance with Policy (FAA, LCH); Interoperability With other Agencies Standards (ESA, ect.) and Procedures Disruption-Tolerant Networking (DTN), Integrated Operations And Provisioning SW Additional Software “Non-Ph.D” Training and Support Operators, Integrators; Documentation CFLOS Analysis; Countering Weather with Multiple Ground Stations; Providing Fiber Connectivity While Minimizing Service Costs; Ground Network Additional Hardware Generic Product System Integration Commercialization Leveraging Telecom Industry “COTS”Components While Building a Vendor Base for Custom HW; DRIVING COSTS DOWN “Buffer and Burst” Edge Electronics; Dealing with Multiple Spacecraft C&DH Interfaces (SpW, MIL-STD-1553, ect) Calibration and Certification Test Facilities at NASA Lunar Relay Titan Lunar Relay Payload (potential) Neptune Saturn Uranus Pluto Charon LADEE Jupiter Laser Comm Relay Demo Mars SCaN CSME NISN NISN MCC MOCs Venus Antenna Array Sun Deep Space Optical Relay Pathfinder Mercury Microwave Links Optical Links 2018 Add: SCaN Services Provide: Add: 2023 Add: •2025 Uniform commitment process via Customer 2014-2015 Add: Integrated service-based architecture Space Optical Initial Capability •••Space Based Relay Initial Service Management Element •Deep Standard Services andCapability Interfaces Space internetworking (DTN Space Internetworking throughout ••••Enhanced Optical Initial Capability Space Internetworking • Delay Tolerant Networkingand IP)Solar System • International interoperability • Significant Increases in Bandwidth •• Deep Space Optical Relay Pathfinder Lunar Comm Relay Demo and ISS Terminal • Deep Space Antenna Array • Significant increases in bandwidth Retirement of Aging RF Systems ••• Lunar Relay Initial Capability to Support Near Earth Optical Initial Capability • Lunar Optical Pathfinder (LADEE) • Mars Orbiting Data Relay Satellite Capability Exploration • TDRS M K, L • TDRS • Possible streaming video from Mars • Lunar Relay Payload (potential) • Increased microwave link data rates 12 NISN