Global Ionospheric Specification from GPS and Airglow Data
Abstract
The long term goal of the project is to produce real-time global ionospheric specification with data and appropriate interpolation models. This will initially be accomplished by ingesting data from ground-based GPS receivers and space-based airglow sensors, although other types of sensors may enter later. The model will provide proper weighting to the location and time, as well as to the sensor. We have developed a technique to specify driving parameters (e.g., effective sunspot number ) of a global climatological ionospheric propagation model (RIBG) from GPS data (Reilly and Singh,1997). Predictions from the GPS data-driven RIBG model have been tested by independent data to show that this technique performs well for mid-latitude ionospheric specification, but not as well for lower latitudes. The first objective of the project was improve performance by including an improved low latitude model in RIBG. Secondly, an initial software implementation of the technique was tested by JPL to update ionospheric conditions on an hourly basis for all global GPS stations, but it was too slow to keep up with data throughput requirements. Our second objective was to make the technique much faster and more robust, to solve this problem. The third objective of the project was to investigate the feasibility of combining the GPS data with space-based ultraviolet airglow measurements for global ionospheric specification.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1997
- Accession Number
- ADA634017
Entities
People
- Malkiat Singh
- Michael H. Reilly