Citation
Abstract
A system analysis has been performed on the error sources in the technique used for ionospheric calibration of deep space probe radio metric data. This analysis is based on the Chapman ionospheric model. Although it has been proven that this model is inadequate in ranging for low elevation angles (< 15 deg) of the spacecraft and large solar zenith angles ( 2|60| deg), this analysis should still be valid for most of the daytime because of the very conservative values adopted for the variations of these Chapman ionospheric parameters. It is found that if a close-by source of total electron content (TEC) data is used, the uncertainty is ~ 10% at low elevation angles and less than ~3% for elevation angles higher than ~ 20 deg. The corresponding values for the distant mapping of TEC data are ~10% and ~8%, respectively.
Details
- Volume
- XVII
- Published
- October 15, 1973
- Pages
- 48–67
- File Size
- 1.6 MB