MEGHA-TROPIQUES satellite was successfully launched on October 12, 2011.
The CNES, prime contractor for the development of SAPHIR and SCARAB instruments, responsible with ISRO of MADRAS instrument development, has conducted, together with ISRO, the first operations after switch on , on the instruments.
Since launch, CNES is receiving at the CNES expertise center, the instruments raw data and is performing the monitoring of the technological parameters for its contribution.
The CNES has realized the in-flight commissioning for the 3 instruments SAPHIR, SCARAB and MADRAS. These in-flight commissioning tasks were organised in two phases:
Phase 1: Functional tests after turning on the instruments
MADRAS, SAPHIR and GPS-ROSA instruments have been powered on immediately after launch, on October 13th, 2011.
In order to prevent from eventual out-gazing problems, SCARAB instrument was put in stand by mode from October 13th to November 3rd, then switched to nominal functioning mode on November 4th.
All SAPHIR instrument modes have been tested and several calibrations were realized during the first days in orbit.
All SCARAB instrument modes have been tested and several calibrations were realised during the first days of nominal operation. Now, monthly calibrations are performed on this instrument in order to verify the gain stability.
All the parameters tunings defined for MADRAS instrument have been performed between October 13th and November 4th, 2011.
Finally, All functional verifications of all the instruments took place during this phase which ended in January 2012.
Phase 2: Commissioning of the instruments performances and calibration
During this second phase, the following activities should take place:
- Characterization of the in-flight performances of the instruments.
- Characterization of the geometrical performances and adaptation of the processing parameters.
- Characterization of the radiometric performances and adaptation of the processing parameters.
- For SAPHIR and MADRAS, comparison with other sensors.
- For SAPHIR and MADRAS, comparison with simulated data.
The results of these studies performed by CNES are made available:
|MAD_RAD_03||MARFEQ thermal performances|