Radio Data Format

Radio Data Format
Marta Burgay
Towards a standard format
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
• Array of time samples (or time bins in a folded
profile) x frequency channel x polarisation
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
• Array of time samples (or time bins in a folded
profile) x frequency channel x polarisation
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
• Array of time samples (or time bins in a folded
profile) x frequency channel x polarisation
t
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
• Array of time samples (or time bins in a folded
profile) x frequency channel x polarisation
ν1
ν2
ν3
…
Δν
t
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
• Array of time samples (or time bins in a folded
profile) x frequency channel x polarisation
• Header infos
ν1
ν2
ν3
…
Δν
t
Towards a standard format
• One format for every backend (WAPP, SCAMP,
APSR, BPSR, …)
• Array of time samples (or time bins in a folded
profile) x frequency channel x polarisation
• Header infos
ν1
ν2
ν3
…
• Now PSRFITS!
Δν
t
PSRFITS
•
www.atnf.csiro.au/research/pulsar/psrfits
Search mode data
Search mode data
• PKS analogue FB SCAMP
Search mode data
• PKS analogue FB SCAMP
• Total intensity
Search mode data
• PKS analogue FB SCAMP
• Total intensity
• 1 bit sampled
Search mode data
•
•
•
•
PKS analogue FB SCAMP
Total intensity
1 bit sampled
Down to 80 us sampling time
Search mode data
•
•
•
•
•
PKS analogue FB SCAMP
Total intensity
1 bit sampled
Down to 80 us sampling time
96x3 MHz or 512 x 0.5 MHz channels
Search mode data
•
•
•
•
•
•
PKS analogue FB SCAMP
Total intensity
1 bit sampled
Down to 80 us sampling time
96x3 MHz or 512 x 0.5 MHz channels
Direct access data, 49152 bytes per block, 640
bytes header
dspsr
dspsr
• http://dspsr.sourceforge.net
• archives raw data into subintegrations and
subbands according to given pulsar ephemeris
dspsr
• http://dspsr.sourceforge.net
• archives raw data into subintegrations and
subbands according to given pulsar ephemeris
dspsr
• http://dspsr.sourceforge.net
• archives raw data into subintegrations and
subbands according to given pulsar ephemeris
Timing mode data
Timing mode data
• PSRFITS
Timing mode data
• PSRFITS
• General header containing info on telescope,
backend, source ephemeris, data
Timing mode data
• PSRFITS
• General header containing info on telescope,
backend, source ephemeris, data
• Array of folded profiles x frequency channels (x
polarisation) with header containing the
polynomial coefficients of the approximation of
the phase and frequency used to each subint
Timing mode data
• PSRFITS
• General header containing info on telescope,
backend, source ephemeris, data
• Array of folded profiles x frequency channels (x
polarisation) with header containing the
polynomial coefficients of the approximation of
the phase and frequency used to each subint
psrchive: vap
psrchive: vap
• http://psrchive.sourceforge.net
psrchive: vap
• http://psrchive.sourceforge.net
▫ http://psrchive.sourceforge.net/manuals/vap
more on psrchive later today