Study Of Distributed Satellite Systems In Insar Imaging Accuracy And Speed Accuracy

The distributed satellite Synthetic Aperture Radar is an innovative SAR system brought forward recently. A group of multitudinous satellites cooperate together to fulfill the function of a single satellite in this system. The multitudinous combination can extend the SAR system's purpose, and enhance the agility and dependability. Because the distributed-satellite SAR system can offer more baseline results, we can raise potential function further and with change or increase the new unit in the multitudinous group, we can support the special adaptation, existence ability and function promotion. Besides we will produce full-scale and descend launch expense, thus we can descend by a street the satellite running life and cost.The text emphatically analyze the influence of all sort of interference to the imaging precision in the InSAR imaging process, particularly the influence of the earth-motion and the satellite-circle to the baseline. We have given the modification formulas of the height measurement in CT-InSAR and the velocity measurement in AWnSAR.The dominant contents of the textual can be induced to the following aspects:1 Expound the fundamental work principal of the distributed-satellite system, expound in detail the work modelæ¡ŸT-InSAR and AT-InSAR and the imaging principal.2.We analysize detailly the influence of the systematical parameter to the height precision in the CT-InSAR. We through the simulation of computer establish the mathematical model of the different deviation source with the height precision and the relation curvature, morever we have given the relation of the height precision with the ground distance in the measurement strap under the given deviation precision.3.We analysize detailly the influence of the earth-rotation and satellite-movement to the baseline parameter in the distributed-satellite, and conduct the homologous baseline modification fomula. Through the comouter simulation, we give the experiment result of the earth-rotation and the satellite-movement to the height measurement in all kind of latitudes.4.We analysize detailly in the distributed-satellite system the influence of the satellite-rotation to the baseline and the interference phase, and conduct the revision fomula of the baseline and the phase. We through the computer simulation verify the correction of the fomula, and through the contrast of the height figure before and after the revision, prove that we must revise availably the baseline and the phase at the same time when the satellite is rotating.5.We analysize detailly in the distributed-satellite system AT-InSAR work model, the relationship between the velocity of the slowly-move target and the baseline selection, give the demand of the velocity precision to the baseline precision, and the influence of the earth-rotation and satellite-movement to the baseline parameter and the homologous simulation result. At last we give the velocity fomula of the slowly-move target after revision.6.We discuss a few methods of baseline precise measurement in the distributed-satellite system.