Receiver bias estimation and validation of e-POP GAP-O ionospheric radio occultation measurements

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Authors

  • C. Watson
  • R. B. Langley
  • A. W. Yau
  • A. Howarth
  • P. T. Jayachandran

Colleges, School and Institutes

External organisations

  • University Corporation for Atmospheric Research
  • University of Calgary
  • University of New Brunswick

Abstract

This paper presents validation of ionospheric Global Positioning System (GPS) radio occultation (RO) measurements of the GPS Attitude, Positioning, and Profiling Experiment occultation receiver (GAP-O). The primary source of uncertainty impacting GAP-O data products is the receiver differential code bias (rDCB). A minimization of standard deviations (MSD) technique for rDCB estimate has shown the most promise, and resulted in estimates ranging from -39 to -29 TECU, including a steady, long term decrease in rDCB magnitude. MSD estimates agree well with the 'assumption of zero topside TEC' method at satellite apogee in the polar cap. Bias-corrected topside TEC of GAP-O was validated by statistical comparison with topside TEC obtained from ground-based GPS TEC and ionosonde measurements. GAP-O and ground-based topside TEC had similar variability, however GAP-O consistently underestimated the ground-derived topside TEC by up to 8 TECU. Ionospheric electron density profiles obtained from Abel inversion of GAP-O occultation TEC showed consistently good agreement with F-region densities of incoherent scatter radar measurements, however RO-derived E-region densities were not as reliable at high latitudes.

Details

Original languageEnglish
Title of host publication2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Publication statusPublished - 10 Nov 2017
Event32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 - Montreal, Canada
Duration: 19 Aug 201726 Aug 2017

Publication series

Name2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Volume2017-January

Conference

Conference32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
CountryCanada
CityMontreal
Period19/08/1726/08/17