This paper addresses relativistic effects in bistatic and multistatic SAR systems and missions. It is shown that the use of different reference frames for bistatic SAR processing and bistatic radar synchronization is prone to nota-ble phase and time errors. These errors are a direct consequence of the relativity of simultaneity and can be ex-plained in good approximation within the framework of Einstein’s special theory of relativity. Using the invari-ance of the spacetime interval, an analytic expression is derived which shows that the time and phase errors in-crease with increasing along-track distance between the satellites. The predicted errors are in excellent agreement with measurements from TanDEM-X and provide a satisfactory explanation for previously observed DEM height offsets that exceeded +-10 m. Consideration of the unexpected relativistic effects is essential for accurate DEM generation in TanDEM-X and has in the meantime been implemented in the operational processing chain.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Relativistic Effects in Bistatic SAR Processing and System Synchronization


    Beteiligte:

    Kongress:

    2012 ; Nuremberg, Germany



    Erscheinungsdatum :

    2012-04-23


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Relativistic Effects in Bistatic Synthetic Aperture Radar

    Krieger, Gerhard / De Zan, Francesco | Deutsches Zentrum für Luft- und Raumfahrt (DLR) | 2014

    Freier Zugriff

    Performance Prediction and Verification for Bistatic SAR Synchronization Link

    Younis, Marwan / Metzig, Robert / Krieger, Gerhard et al. | Deutsches Zentrum für Luft- und Raumfahrt (DLR) | 2006

    Freier Zugriff

    Performance Prediction of a Phase Synchronization Link for Bistatic SAR

    Younis, Marwan / Metzig, Robert / Krieger, Gerhard | Deutsches Zentrum für Luft- und Raumfahrt (DLR) | 2006

    Freier Zugriff

    An Electronic Implementation of Lorenz Chaotic Oscillator Synchronization for Bistatic Radar Applications

    Pappu, Chandra S. / Flores, Benjamin C. / Debroux, Patrick S. et al. | IEEE | 2017


    Bistatic Radar Tracking With Significantly Improved Bistatic Range Accuracy

    Marom, Hagay / Bar-Shalom, Yaakov / Milgrom, Benny | IEEE | 2023