Prediction Techniques for the Effect of the Ionosphere on Pseudo-Ranging from Synchronous Altitude Satellites
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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The study is directed toward defining and evaluating prediction techniques for the influence of the ionosphere on pseudo-range observations from a satellite navigation system. The synchronous satellite navigation system for which the study was intended is discussed and the limitations imposed on the correction technique by its characteristics and the proposed navigation equipment are described. The salient features of an operational correction system are defined. Alternatives for the content format and method conveyance of the information from which the corrections are to be made are discussed. Three distinct algorithms that can be used to predict the ionospheric induced time or range error are defined and evaluated. One algorithm is capable of long-term predictions while the other two are dedicated to near real-time predictions. Data accumulated over several years at several locations form the basis of the evaluation of the three algorithms.
- Atmospheric Physics
- Radiofrequency Wave Propagation