PRF ambiguity resolving for SAR

Hartmut Runge, Richard Bamler

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations


For high-precision SAR (synthetic aperture radar) processing, the determination of the absolute Doppler centroid is indispensable. The Doppler frequency estimated from azimuth spectra, however, suffers from the fact that the data are sampled with the PRF (pulse repetition frequency), resulting in ambiguity about the correct PRF band. Five methods for ambiguity resolution are discussed together with the known technique of look correlation. None of these methods has a requirement on the mission schedule. It is shown that the following effects can be used to measure the absolute Doppler frequency: the Doppler shift of range spectra, range migration, image geometric misregistration, and the use of multifrequency-radar data.

Original languageEnglish
Number of pages4
StatePublished - 1989
Externally publishedYes
EventIGARSS'89 - Twelfth Canadian Symposium on Remote Sensing Part 1 (of 5) - Vancouver, BC, Can
Duration: 10 Jul 198914 Jul 1989


ConferenceIGARSS'89 - Twelfth Canadian Symposium on Remote Sensing Part 1 (of 5)
CityVancouver, BC, Can


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