18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 1 Commissioning update B.C.Stewart RAL

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 2 Topics History Functional tests Calibration tests

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 3 History 11 th Dec SUNBLOCK –Torque level 4 12 th Dec 16:01 – 13 th Dec 09:48 NORMAL (262) –Earth view centered 16 th Dec 13: th Dec 16:35 NORMAL (262) 15 th Jan 16:41 – 16 th Jan 13:08 NORMAL (262) 16 th Jan 13:40 – 22 nd Jan 10:55 NORMAL (282) –Extended Earth scan, Torque Level 3, SEVERI ON/OFF 22 nd Jan 11:14 – 22 nd Jan 12:09 NORMAL (262) –TOT + TOT, asymmetries

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 4 History(2) 22 rd Jan 12:17 – 24 th Jan 14:15 0.0° step size ‘NORMAL’ mode –Fixed mirror angle –CALMON diode v. detector signal variation over ~48 hours –Attempt at limb observation –Moon observations 23 rd Jan 15:39 – 17:17 24 th Jan 14:23 – 30 th Jan 17:15 NORMAL (262), TL 3 –28 th Jan 10:03-12:57 TL’s 1 and 2 –2 days (25 th -26 th ) when SEVERI OFF 30 th Jan 17:26 – 31 st Jan 15:00 PSF ‘whole Earth’ at x5 resolution 31 st Jan 15:12 – 3 rd Feb 15:53 NORMAL (262) –1 st – 2 nd Feb SEVERI OFF

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 5 History(3) 3 rd Feb 16:05 – 6 th Feb 09:45 Deep Space ( ) –Heaters 1, 2 ON/ OFF over ~2 days –Serendipitous lunar observations –Stray light 6 th Feb 09:47 – 10 th Feb 13:51 NORMAL (262) –Includes change to Earth sensor 10 th Feb 13:55 -14:08 Alpha value scan –Attempt 10 th Feb 15:10 – 15:42 SW CAL –‘serendipitous’ Earth limb in ‘dark’ observation 10 th Feb 15:47 – 28 th April SAFE mode –Sun avoidance period

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 6 Current/ future 28 th April 11:44 – 13:30 SUNBLOCK TCF ‘null’ ON/OFF 15:23 – 16:11 SUNBLOCK TCF ‘step’ ON/OFF 28 th April 16:13 – 9 th May 14:49 NORMAL mode –1 st May 11:16 – 19:28 Sensor swaps –SW CAL 30 th April 14:53 9 th May 14:49 - SAFE mode 13 th May – MSG manoeuvre 19 th May - –Alpha values –Mirror timing Correlated observations with CERES –last 2 weeks in May, early June 6 th June – PSF

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 7 Functional tests MSG System Commissioning [GIFRPT] GERB Instrument Functional Test Report covers (DRAFT 29/01/03) –Mode switching (OFF, ROM, SNOOZE, SAFE, SUNBLOCK, NORMAL) –Descan Mirror operation –Quartz Filter operation –Detector operation –TMTC –Scanning timing –Thermal control –Safety procedures and limit checking –Patch and dump –Torque levels + TCFs

18 th GIST Meeting 14 th –16 th May 2003 Ground Segment (GGSPS) Report 8 CalibrationsTests Verification of the on ground characterisation of the pixel time constant corrections (to be done) Characterisation of the Calibration Monitor (2 SW CAL + 48hr mirror fixed) Assessment of the deep space scan (24 hour obs) Evaluation of the lunar scan for calibration purposes (1 obs) Evaluation of each detector’s PSF (1 day whole Earth + SW CAL ‘dark’) Evaluation of the GERB calibration modes In-flight characterisation of misalignment (N.B. addressed by RMIB analysis early in the mission and after each manoeuvre throughout the mission). New Mirror face offsets (to be done) Stray light (to be done)