Error budget analysis for geolocation accuracy of high resolution SAR satellite imagery

Seung Hwan Hong, Hong Gyoo Sohn, Sang Pil Kim, Hyo Seon Jang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The geolocation accuracy of SAR satellite imagery is affected by orbit and sensor information and external variables such as DEM accuracy and atmospheric delay. To predict geolocation accuracy of KOMPSAT-5 and KOMPSAT-6, this paper uses TerraSAR-X imagery which has similar spec. Simulation data for sensitivity analysis are generated using range equation and doppler equation with several key error sources. As a result of simulation analysis, the effect of sensor information error is larger than orbit information error. Especially, onboard electronic delay needs to be monitored periodically because this error affects geolocation accuracy of slant range direction by 30m. Additionally, DEM accuracy causes geolocation error by 20∼30m in mountainous area and atmospheric delay can occur by 5m in response to atmospheric condition and incidence angle.

Original languageEnglish
Pages (from-to)447-454
Number of pages8
JournalJournal of the Korean Society of Surveying Geodesy Photogrammetry and Cartography
Volume31
Issue number6 PART 1
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

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