Error Modeling and Analysis for InSAR Spatial Baseline Determination of Satellite Formation Flying
نویسندگان
چکیده
Spatial baseline determination is a key technology for interferometric synthetic aperture radar InSAR missions. Based on the intersatellite baseline measurement using dual-frequency GPS, errors induced by InSAR spatial baseline measurement are studied in detail. The classifications and characters of errors are analyzed, and models for errors are set up. The simulations of single factor and total error sources are selected to evaluate the impacts of errors on spatial baseline measurement. Single factor simulations are used to analyze the impact of the error of a single type, while total error sources simulations are used to analyze the impacts of error sources induced by GPS measurement, baseline transformation, and the entire spatial baseline measurement, respectively. Simulation results show that errors related to GPS measurement are the main error sources for the spatial baseline determination, and carrier phase noise of GPS observation and fixing error of GPS receiver antenna are main factors of errors related to GPS measurement. In addition, according to the error values listed in this paper, 1mm level InSAR spatial baseline determination should be realized.
منابع مشابه
Possible Orbit Scenarios for an InSAR Formation Flying Microsatellite Mission
Multistatic interferometric synthetic aperture radar (InSAR) is a promising future payload for a small satellite constellation, providing a low-cost means of augmenting proven “large” SAR mission technology. The Space Flight Laboratory at the University of Toronto Institute for Aerospace Studies is currently designing CanX-4 and CanX-5, a pair of formation-flying nanosatellites slated for launc...
متن کاملAttitude Synchronization Control in Satellite Formation Flying in the Presence of States Measurement Errors
This paper presents a novel attitude synchronization framework for tracking control of multiple identical/heterogeneous satellites in formation flying with connected communication graph. The main contribution of the paper is considering sensors' measurement error to derive control gains. Moreover, the proposed strategy need no angular velocity communication. Nevertheless, the tracking synchroni...
متن کاملError Analysis of Velocity Estimation via Bistatic Along Track InSAR
Bistatic SAR uses separated transmitted and receiver flying on different platforms. Such a spatial separation has several operational advantages in military applications the vulnerability of the system is reduced, because the transmitter can be positioned far away, while the passive receiver is difficult to locate. The bistatic along track interferometric SAR (AT−InSAR) model is one kind of bis...
متن کاملSystem Requirements and Mission Analysis for Spaceborne Sar Interferometry Based on Formation Flying Satellites
With the purpose of further development of SAR satellite technique and for Earth’s topography, SAR interferometry, with which one can get, not only images with target’s azimuth and range information, elevation information, has come into application. Among these studies, formation flying satellites proposal is one of the most effective methods. This paper presents a brief introduction of the for...
متن کاملSimulation Platform for Relative Navigation Using GPS Carrier Phase Measurements for Satellite Formation Flying Missions
The use of Global Positioning System (GPS) technology for satellite formation flying missions has received more attention recently. The Carrier Phase Differential Global Positioning System (CDGPS) technique is generally employed to obtain relative position of a high accuracy. To validate the formation flying CDGPS algorithm, a simulation platform is necessary to simulate the GPS signals receive...
متن کامل