Sand transport is an important effect in global climate studies, particularly in relation to desertification and dust generation, and is linked with topographic changes of aeolian surfaces. Radar interferometry has the capability to map topography and topographic changes of any terrain. As part of the project, ERS tandem data acquired over the Algodones Dunefield in California (USA) have been analysed. Four data pairs, each consisting of two images acquired on consecutive days, were available every 35 days in the period from January to June 1996. The topography of the test site was derived for each tandem pair with local height accuracies of the order 5-10 m. Significant large scale distortions due to atmospheric propagation anomalies were recognised. Differences between individual topographic maps showed no statistically significant topographic changes throughout the monitoring period. The radar brightness, topographic slopes, and interferometric decorrelation are useful measures of surface properties related to aeolian classes and aerodynamic roughness. (Related projects - see: www.dcrs.dtu.dk).
|Effective start/end date||01/01/1997 → 31/12/1997|
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