| タイトル | A new gravitational model for the earth from satellite tracking data - GEM-T1 |
| 著者（英） | Putney, B. H.; Lerch, F. J.; Marsh, J. G.; Smith, D. E.; Christodoulidis, D. C. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1988-06-10 |
| 言語 | eng |
| 内容記述 | A computation of a terrestrial gravitational field model called the Goddard Earth Model GEM-T1 is discussed and compared to previous models, including the GEM-L2. The software tools were redesigned for the model, allowing for the optimization of the technique of relative data weighting and model estimation used in GEM solutions. The GEM-T1 model provides a simultaneous solution for a gravity model in spherical harmonics complete to degree and order 36, a subset of 66 ocean tidal coefficients for the long-wavelength components of 12 major tides, and 5-day averaged earth rotation and polar motion parameters for the 1980 period on. GEM-T1 was derived from satellite tracking data acquired on 17 different satellites whose inclinations ranged from 15 degrees to polar. A simulation of the TOPEX/POSEIDON orbit using the covariances of the GEM-T1 model was made. Estimated radial error for the simulation was reduced to less than 30 cm rms. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 88A41826 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/370288 |
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