THE ASCENSION ISLAND EXPERIMENT: MEASUREMENT OF IONOSPHERIC SCINTILLATION EFFECTS ON PALSAR-2

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

Authors

Colleges, School and Institutes

External organisations

  • Swedish Defence Reserach Agency (FOI), Linkoping

Abstract

The effect of the ionosphere on SAR imaging has been studied previously from both an analytic and a numerical simulation perspective. Recently, effects visible in SAR imagery have been ascribed to turbulence in the ionosphere. This paper describes an experiment that seeks to use ground-based GPS measurements of the ionospheric scintillation, collected simultaneously with PALSAR-2 imagery, to unambiguously confirm the predictions of the analytic theory. PALSAR-2 (on board the ALOS-2 satellite) was used in spotlight mode to image a 5m corner reflector to obtain an accurate measurement of the point spread function (PSF). Initial results, obtained during the 2014/15 scintillation season, confirm that the analytic theory describing the shape of the SAR PSF is correct. This is then used to obtain two measures of the scintillation, p and CkL, directly from the PALSAR-2 PSF. The collected data set can also be used for further research into ionospheric autofocus techniques.

Details

Original languageEnglish
Title of host publicationGeoscience and Remote Sensing Symposium (IGARSS), 2015 IEEE International
Publication statusPublished - 12 Nov 2015
EventInternational Geoscience and Remote Sensing Symposium 2015 (IGARSS 2015) - Milan, Italy
Duration: 26 Jul 201531 Jul 2015

Conference

ConferenceInternational Geoscience and Remote Sensing Symposium 2015 (IGARSS 2015)
CountryItaly
CityMilan
Period26/07/1531/07/15