Tropospheric and ionospheric effects in spaceborne single-pass SAR interferometry and radargrammetry

Gerhard Krieger, Francesco De Zan, Markus Bachmann, Paco Lopez Dekker, Marc Rodriguez Cassola, Jun Su Kim

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

8 Citations (Scopus)

Abstract

It has often been claimed that spaceborne single-pass cross-track SAR interferometry is - up to an overall range shift - not affected by atmospheric effects. A closer analysis reveals, however, that both the troposphere and the ionosphere may cause notable phase, range and height offsets even in a single-pass interferometer. One such offset is due to slightly different incident angles which cause different path lengths through both the troposphere and the ionosphere. Another subtle effect arises from the wavenumber shift in combination with a dispersive medium like the ionosphere, which may induce differential range offsets in coherent radargrammetry. The analyses in this paper are not only of importance for future low-frequency bistatic SAR missions like Tandem-L, but they may also shed some new light on how the ionosphere can influence repeat-pass interferometry and radargrammetry in case of non-vanishing cross-track baselines.

Original languageEnglish
Title of host publicationProceedings of 10th European Conference on Synthetic Aperture Radar, EUSAR 2014
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1097-1100
Number of pages4
Volume2014-June
ISBN (Electronic)978-380073607-2
Publication statusPublished - 2014
Externally publishedYes
Event10th European Conference on Synthetic Aperture Radar - Berlin, Germany
Duration: 3 Jun 20145 Jun 2014
Conference number: 10

Conference

Conference10th European Conference on Synthetic Aperture Radar
Abbreviated titleEUSAR 2014
Country/TerritoryGermany
CityBerlin
Period3/06/145/06/14

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