Answers are grounded in this paper and cite their sources.
The accuracy of satellite Doppler data for navigation, geodesy, and ionospheric electron content determination has been suspect because of failure to eliminate the effects of transmission path inequality caused by refraction. Previous examination of ionospheric refraction has revealed a frequency dependence allowing the required correction when three frequencies are received simultaneously. A ray-tracing program on a digital computer is used to simulate satellite passes, and the resultant errors in two-frequency and three-frequency data are presented and compared. The three-frequency Doppler technique is shown to effectively reduce residual ionospheric refraction errors to negligible amounts for the conditions considered.
No takes yet. Share an insight, caveat, or question.
Willman et al. (1968) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: