| OPERATION |
DURATION
(DAYS) |
BEGINING |
END |
DONE |
COMMENTS |
 Beginning of the in orbit functional validation |
|
October 24th |
|
|
|
| Phase 1 : Switch on |
1 |
October 24th |
October 24th |
Yes |
Instrument Management Unit switch on
|
| Phase 2 : Heater 1 mode |
0 |
October 24th |
October 24th |
Yes |
Thermal Control Unit switch on: The temperatures reach the nominal values.
|
| Phase 3 : Decontamination |
27 |
October 25th |
Novemb 20th |
Yes |
The instrument decontamination starts on October 25th. During this phase, heaters are activated in the Cryogenic Unit for warming it at about 20 Celcius in order to avoid water vapor condensation inside the instrument.
About 7 SEU/day are detected by the Management Unit memories. The impacts are concentrated over South Atlantic and over the Poles, as foreseen. Due to the EDAC, the SEU do not affect the Management Unit functionality.
The decontamination ends on 20 of November.
|
| Phase 4 : Cooling down |
2 |
Novemb 20th |
Novemb 21th |
Yes |
The decontamination heaters being switch off, the Cryogenic Unit cools down to - 180 Celsius.
|
| Phase 5 : Interferometer mecanisms unlocking |
2 |
Novemb 22th |
Novemb 23th |
Yes |
The heaters of the locking device cartridges have been activated for unlocking the cube corner mecanism and the dynamic compensation mecanism.
|
| Phase 6 : Heater 2 mode |
3 |
Novemb 24th |
Novemb 26th |
Yes |
All parameters are nominal.
|
| Phase 7 : Initial set up |
3 |
Novemb 27th |
Novemb 29th |
Yes |
For the first time, IASI is running in Normal Operational mode. The Digital Processing Subsystem is not yet activated. The first interferograms are down loaded to the Technical Expertise Center for analysing.
|
| Phase 8 : Operational parameters uploaded |
5 |
Novemb 30th |
December 4th |
Yes |
The Digital Processing Subsystem (DPS) parameters are issued by the Technical Expertise Center and uploaded to the instrument. The DPS is activated. The first spectra processed in board the instrument are received at the Technical Expertise Center in Toulouse. All the instrument units are working properly. The first performance analysis are promising.
|
| Phase 9 : External calibration mode |
1 |
Decemb 4th |
Decemb 4th |
Yes |
External calibration mode is switch on. Analysis show that the radiometric performance of IASI is a little bit better than the performance measured during instrument ground testing.
|
| Phase 10 : Routine mode |
8 |
Decemb 4th |
Decemb 12th |
Yes |
Operatioal mode is activated again.
|
| Phase 11 : Heater 1 mode |
0 |
Decemb 12th |
Decemb 12th |
Yes |
Transition mode for going to decontamination
|
| Phase 12 : Decontamination |
6 |
decemb 12th |
decemb 18th |
Yes |
The decontamination mode is activated for the second time for a short duration.
|
| Phase 13 : Unlocking of the three feet |
|
|
|
No |
The necessity of unlocking the feet being not demonstrated at present time, this operation is postponed of about 3 months.
|
| Software patch uploading |
2 |
Decemb 18th |
Decemb 19th |
Yes |
Patchs are uploaded for improving the DPS functionality and algorithms.
|
| Phase 14 : Routine mode |
20 |
Decemb 20th |
January 8th |
Yes |
IASI is running in operational mode until the end of the functional commissioning.
|
| End of the in orbit functional validation |
|
|
January 8th |
Yes |
Very successful functional commissioning
|
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