Modeling Low Latitude Ionospheric Dispersion

摘要

The low latitude ionosphere covers a large region stradding the geomagnetic equator and includes half the earth's surface area and many geographic regions of economic, political, and military importance. The morphology of the low latitude ionosphere is complex and includes spatial and temporal variability on a wide range of scales. The present GPS single frequency ionospheric time delay algorithm does not capture this morphology. As a result of a Phase I SBIR study we have identified the necessary ingredients that an improved GPS ionospheric algorithm must incorporate if accurate ionospheric range corrections are to be available for single frequency users.