| タイトル | Nimbus-7 scanning multichannel microwave radiometer /SMMR/ in-orbit performance appraisal |
| 著者（英） | Gloersen, P.; Cavalieri, D. J.; Gatlin, J. A. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1981-01-01 |
| 言語 | eng |
| 内容記述 | Calibration and processing techniques enacted during first year of operation of the Nimbus-7 scanning multichannel microwave radiometer (SMMR) are described. It was found that in-orbit calibration was necessary, as was fine-tuning of the geophysical parameter retrieval parameters to account for anomalies such as lower-than-expected polarization differences in ocean radiances. Phase shifts in the scan angles were corrected in order to avoid polarization mixing. Calibration constants to eliminate cross-talk and phase shift effects were established for radiation reflected from the earth, then averaged over data from 300 orbits to fit points on a sine curve to better than 0.2 K accuracy. An iterative approach was determined to be necessary due to signal anomalies caused by antenna dish oscillations. Global ocean and atmosphere parameters used to construct a radiation model of ten latitude bands are presented for use in radiation transfer equations. |
| NASA分類 | SPACECRAFT INSTRUMENTATION |
| レポートNO | 83A10007 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/407133 |
