| タイトル | Soil Moisture Active/Passive (SMAP) Radiometer Subband Calibration and Calibration Drift |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160014902 |
| 著者（英） | Piepmeier, Jeffrey R.; De Amici, Giovanni; Peng, Jinzheng; Mohammed, Priscilla |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2016-07-10 |
| 言語 | eng |
| 内容記述 | The SMAP is one of four first-tier missions recommended by the US National Research Council's Committee on Earth Science and Applications from Space (Earth Science and Applications from Space: National Imperatives for the Next Decade and Beyond, Space Studies Board, National Academies Press, 2007)]. The observatory was launched on Jan 31, 2015. The goal of the SMAP is to measure the global soil moisture and freeze/thaw from space. The L-band radiometer is the passive portion of the spaceborne instrument. It measures all four Stokes antenna temperatures and outputs counts. The Level 1B Brightness Temperature (L1B_TB) science algorithm converts radiometer counts to the Earths surface brightness temperature. The results are reported in the radiometer level 1B data product together with the calibrated antenna temperature (TA) and all of the corrections to the unwanted sources contribution. The calibrated L1B data product are required to satisfy the overall radiometer error budget of 1.3 K needed to meet the soil moisture requirement of 0.04 volumetric fraction uncertainty and the calibration drift requirement of no larger than 0.4 K per month. |
| NASA分類 | Earth Resources and Remote Sensing |
| レポートNO | GSFC-E-DAA-TN33537-2 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
