| タイトル | Global Precipitation Measurement Mission Launch and Commissioning |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150008352 |
| 著者（英） | Vess, Missie; Deweese, Keith; Davis, Nikesha; O'Donnell, James R., Jr.; Welter, Gary |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2015-01-30 |
| 言語 | eng |
| 内容記述 | During launch and early operation of the Global Precipitation Measurement (GPM) Mission, the Guidance, Navigation and Control (GNC) analysis team encountered four main on orbit anomalies. These include: (1) unexpected shock from Solar Array deployment, (2) momentum buildup from the Magnetic Torquer Bars (MTBs) phasing errors, (3) transition into Safehold due to albedo-induced Course Sun Sensor (CSS) anomaly, and (4) a flight software error that could cause a Safehold transition due to a Star Tracker occultation. This paper will discuss ways GNC engineers identified and tracked down the root causes. Flight data and GNC on board models will be shown to illustrate how each of these anomalies were investigated and mitigated before causing any harm to the spacecraft. On May 29, 2014, GPM was handed over to the Mission Flight Operations Team after a successful commissioning period. Currently, GPM is operating nominally on orbit, collecting meaningful scientific data that will significantly improve our understanding of the Earth's climate and water cycle. |
| NASA分類 | Instrumentation and Photography; Geophysics; Meteorology and Climatology |
| レポートNO | GSFC-E-DAA-TN20547 |
| 権利 | No Copyright |
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