Sensors 2009, 9(1), 175-195; doi:10.3390/s90100175
Article

Effects of Orbit and Pointing Geometry of a Spaceborne Formation for Monostatic-Bistatic Radargrammetry on Terrain Elevation Measurement Accuracy

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Received: 11 November 2008; in revised form: 29 December 2008 / Accepted: 30 December 2008 / Published: 8 January 2009
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Italy)
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Abstract: During the last decade a methodology for the reconstruction of surface relief by Synthetic Aperture Radar (SAR) measurements – SAR interferometry – has become a standard. Different techniques developed before, such as stereo-radargrammetry, have been experienced from space only in very limiting geometries and time series, and, hence, branded as less accurate. However, novel formation flying configurations achievable by modern spacecraft allow fulfillment of SAR missions able to produce pairs of monostatic-bistatic images gathered simultaneously, with programmed looking angles. Hence it is possible to achieve large antenna separations, adequate for exploiting to the utmost the stereoscopic effect, and to make negligible time decorrelation, a strong liming factor for repeat-pass stereo-radargrammetric techniques. This paper reports on design of a monostatic-bistatic mission, in terms of orbit and pointing geometry, and taking into account present generation SAR and technology for accurate relative navigation. Performances of different methods for monostatic-bistatic stereo-radargrammetry are then evaluated, showing the possibility to determine the local surface relief with a metric accuracy over a wide range of Earth latitudes.
Keywords: Spaceborne Monostatic-Bistatic Synthetic Aperture Radar; Single-Pass Stereo-Radargrammetry; Space Mission Design; Terrain Elevation Measurement Accuracy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Renga, A.; Moccia, A. Effects of Orbit and Pointing Geometry of a Spaceborne Formation for Monostatic-Bistatic Radargrammetry on Terrain Elevation Measurement Accuracy. Sensors 2009, 9, 175-195.

AMA Style

Renga A, Moccia A. Effects of Orbit and Pointing Geometry of a Spaceborne Formation for Monostatic-Bistatic Radargrammetry on Terrain Elevation Measurement Accuracy. Sensors. 2009; 9(1):175-195.

Chicago/Turabian Style

Renga, Alfredo; Moccia, Antonio. 2009. "Effects of Orbit and Pointing Geometry of a Spaceborne Formation for Monostatic-Bistatic Radargrammetry on Terrain Elevation Measurement Accuracy." Sensors 9, no. 1: 175-195.


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