pacs sovt-2 and caps development mpia pacs icc meeting #31 12 th – 13 th january 2009, vienna (a)...
TRANSCRIPT
PACS SOVT-2and
CAPs developmentMPIA
PACS ICC Meeting #3112th – 13th January 2009, Vienna (A)
Markus Nielbock (MPIA)
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
Initial Remarks
ICC#31, 13th Jan 2009
• worked on SOVT-2 data from OD 63
• late arrival due to database problems at HSC and propagation to MPE
• tried working on ESAC/MPE data pool products and TM files (thx to EW)
• first useful data available on Friday, more on Sunday
• used dp-pacs on pacs-ds2 (MPE) remotely – plotting a nightmare
• my first experience with SPG product analysis (tutorials needed)
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS Chopper Angular Calibration (CAPs)
ICC#31, 13th Jan 2009
• ground calibration needs to be redone in orbit (zero gravity)
• measure mechanical zero point offset
• open-loop measurement (SFT) used for static/dynamical properties
• new CAPs available, based on previous versions (JIDE & IDL)
‐ had to be split into two CAPs (Jython error: too many code lines)
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS Chopper Characterisation (CAPs)
ICC#31, 13th Jan 2009
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS Chopper Characterisation (CAPs)
ICC#31, 13th Jan 2009
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS Chopper automatic PID characterisation
ICC#31, 13th Jan 2009
• iteration on small modifications around five PID parameters
• BBIDs “abused” for parameter set indexing
• originally designed for Commissioning Phase
15 following observations lost (SPEC) – “NACK” in event log detected PV phase clone will be changed accordingly
• SOVT-2 data did not contain diagnostic HK (necessary for performance analysis)‐ neither in pool products nor in TM file
‐ no telecommand history available
• SPEC HK indicates observation was fully executed
• CAPs (Jeroen Bouwman) based on manual PID tuning analysis – fully tested
chopper was switched off during SOVT-2 at end of measurement
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS Chopper automatic PID characterisation
ICC#31, 13th Jan 2009
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS PHOT Linearity in Flux
ICC#31, 13th Jan 2009
• standard PHOT dithered point source photometry AOT used
• during PV phase: sequence of objects covering large flux range (low + high gain)
• during SOVT-2: one AOR – tracking on SSO Ceres
• full analysis still pending (late delivery of SPG products – Level 0 only)• Level 2 processing with SPG script successful (error message: no SIAM available) pointing offset due to missing FPG
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS PHOT Linearity in Flux
ICC#31, 13th Jan 2009
• footprint of blue PHOT array
• pointing information available
• detector PA corresponds to roll angle• relative positions correct?
cal sources
blue PHOT array
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS PHOT Linearity in Flux
ICC#31, 13th Jan 2009
• footprint of blue PHOT array pixels
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS PHOT Linearity
ICC#31, 13th Jan 2009
• offset due to missing SIAM
• and source coordinates (earth vs. L2)• PA corresponds to roll angle
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
PACS PHOT Linearity
ICC#31, 13th Jan 2009
• consistency check (aligned to coordinate mean values)
• relative propagation of coordinates in time (RA and Dec separately)• added pointing of individual raw frames
Ceres
raw frames
final frames
• trend of telescope tracking seems correct
Marku
s Nie
lbock – P
AC
S S
OV
T-2
Wash
Up / C
APs
Conclusions
ICC#31, 13th Jan 2009
• OD 63 data very late for ICC meeting analysis due to database problems• pointing checks impossible SIAM not applied
• diagnostic HK data missing?
• PHOT dithered Point Source AOT + tracking SSO executed (successful?)• CAPs for chopper characterisation ready and tested
• strong plead for tutorials on data product handling (How to …), help function no help• exercise useful for data handling practice