Global Sporadic-E Climatological Analysis using GPS Radio Occultation and Ionosonde Data
Abstract
A climatology of sporadic E (Es) derived from a combined data set of GPS radio occultation (GPS-RO) and ground-based ionosonde soundings is presented for the period from September 2006 to February 2019. The ionosonde soundings were measured using the Lowell Digisonde International (LDI) Global Ionosphere Observing Observatory (GIRO) network consisting of 65 sites and 13,141,060 total soundings. The GPS-RO observations were taken aboard the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) satellites and processed using two binary Es detection algorithms, totaling 9,072,922 occultations. The first algorithm is an S4 amplitude threshold calibrated to the occurrence of any blanketing Es (fbEs) with no lower limit on frequency, and the second is a threefold phase perturbation criteria calibrated to the occurrence of fbEs = 3 MHz. It was found that Es primarily occurs in mid-latitude regions (10o-60o geomagnetic latitude) in the late afternoon and early evening (1500-2000SL)...
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2022
- Accession Number
- AD1167033
Entities
People
- Travis J. Hodos
Organizations
- Air Force Institute of Technology