Herschel Status Report - April 2012
Spacecraft
The spacecraft continues to be in good health and is operating nominally.
Payload
Operations for all three instruments, PACS, SPIRE and HIFI, have been nominal during the reporting period. Occasional HIFI single event upsets (SEUs) were routinely handled via standard procedures and had no impact on the observations. The efficiency of scheduling Herschel's observations remains high and the average time of executing observations (19.5 hours per day) remains well above the mission baseline of 18.0 hours per day.
Ground Segment
Ground segment operations have been nominal and 100% of the data continues to be recovered. As of 27 April 2012, the approximate completion of the different programme parts was:
| KPGT | Key Programme Guaranteed Time | : | 99% |
| KPOT | Key Programme Open Time | : | 99% |
| GT1 | First in-flight Guaranteed Time | : | 98% |
| OT1 | First in-flight Open Time, high priority | : | 79% |
| First in-flight Open Time, lower priority | : | 3.4% | |
| GT2 | Second in-flight Guaranteed Time | : | 48% |
| OT2 | Second in-flight Open Time, priority 1 | : | 11% |
| Second in-flight Open Time, priority 2 | : | 0% |
For more details of the different programme parts, see the "overview of Herschel observing" linked from the right-hand menu.
Mission Operations
Throughout the reporting period, mission operations have been conducted with the support of ESA's New Norcia ground station. Observational data stored on-board Herschel was received on ground during daily communication passes, each lasting approximately three hours.
A routine station-keeping manoeuvre, or orbit correction manoeuvre, was performed on 27 April. These routine manoeuvres ensure the spacecraft maintains its correct operational orbit about L2.
Archiving
The ground segment is operating nominally. Data products are generated routinely and ingested into the Herschel Science Archive (HSA). On 27 April the fourth bulk reprocessing of all archived Herschel data was started with the latest version of the data processing software.
Future Milestones
- 14 May 2012: Third launch anniversary of Herschel
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Legal disclaimer
This report is based on the Herschel Mission Manager's report dated 1 May 2012. Please see the copyright section of the legal disclaimer (linked from the home page http://sci.esa.int) for terms of use.