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Commissioning update

Commissioning update. B.C.Stewart RAL. Topics. History Functional tests Calibration tests. 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 13:47 - 18 th Dec 16:35 NORMAL (262)

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Commissioning update

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  1. Commissioning update B.C.Stewart RAL Ground Segment (GGSPS) Report

  2. Topics • History • Functional tests • Calibration tests Ground Segment (GGSPS) Report

  3. History • 11th Dec SUNBLOCK • Torque level 4 • 12th Dec 16:01 – 13th Dec 09:48 NORMAL (262) • Earth view centered • 16th Dec 13:47 - 18th Dec 16:35 NORMAL (262) • 15th Jan 16:41 – 16th Jan 13:08 NORMAL (262) • 16th Jan 13:40 – 22nd Jan 10:55 NORMAL (282) • Extended Earth scan, Torque Level 3, SEVERI ON/OFF • 22nd Jan 11:14 – 22nd Jan 12:09 NORMAL (262) • TOT + TOT, asymmetries Ground Segment (GGSPS) Report

  4. History(2) • 22rd Jan 12:17 – 24th 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 23rd Jan 15:39 – 17:17 • 24th Jan 14:23 – 30th Jan 17:15 NORMAL (262), TL 3 • 28th Jan 10:03-12:57 TL’s 1 and 2 • 2 days (25th-26th) when SEVERI OFF • 30th Jan 17:26 – 31st Jan 15:00 PSF ‘whole Earth’ at x5 resolution • 31st Jan 15:12 – 3rd Feb 15:53 NORMAL (262) • 1st – 2nd Feb SEVERI OFF Ground Segment (GGSPS) Report

  5. History(3) • 3rd Feb 16:05 – 6th Feb 09:45 Deep Space (262+260) • Heaters 1, 2 ON/ OFF over ~2 days • Serendipitous lunar observations • Stray light • 6th Feb 09:47 – 10th Feb 13:51 NORMAL (262) • Includes change to Earth sensor • 10th Feb 13:55 -14:08 Alpha value scan • Attempt • 10th Feb 15:10 – 15:42 SW CAL • ‘serendipitous’ Earth limb in ‘dark’ observation • 10th Feb 15:47 – 28th April SAFE mode • Sun avoidance period Ground Segment (GGSPS) Report

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

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