Comparison of gravimetric geoids with Geos 3 altimetric geoid

摘要: By means of 1° × gravimetric geoids in the North Atlantic, Northwest Pacific, and Indian oceans, comparisons have been made with Geos 3 radar altimeter estimates geoid height. Most commonly, there are constant offsets long-wavelength discrepancies between two data sets; many probable causes, including radial orbit error, scale errors geoid, or bias altitude determination. Across Aleutian trench do not measure entire depth anomaly. This is due to averaging over squares subsequent aliasing data. Especially above systems can be considerable energy for frequencies higher than resolvable by geoids; such a signal, though, detected altimeter. After adjustment eliminate discrepancies, agreement 1.7 2.7 m rms error. In hypothetical experiment comparison an determining gravimeter measuring gravity. At longer wavelengths will signal noise ratio, but at shorter perform better.