Chen J. | Guo Z. | Wang S. | Du W. | Kutoğlu, Hakan Şenol

Article | 2017 | Boletin Tecnico/Technical Bulletin55 ( 17 ) , pp.561 - 568

In order to solve the problem of positioning accuracy of the miniature synthetic aperture radar (Mini SAR) remote sensing system, an error estimation method based on Position and Orientation System (POS) data and error theory is proposed. This method analyzed the characteristics of small POS data and error theory, which named Error Estimation Method Based on Double Observations (EEMDO). EEMDO has realized the problem of small Inertial Measurement Unit and Global Position System (IMU/GPS) measurement error assessment. With Range-Doppler model, the range localization accuracy problem of Mini SAR has been solved. First of all, accordin . . .g to the plane measurement no difference between precise point positioning (PPP) and differential GPS (DGPS), the double observations approximate equal observation, and the weighted by the number of measurements is the same to the precise, used to estimate the measurement error of POS. Finally, combine with the Range-Doppler model, the result of range position accuracy of Mini SAR image is calculated. In order to validate the EEMDO, the simultaneous high-precision DGPS data of POSAV 610and control point data were used for verification respectively. The evaluation results show that the EEMDO can estimate the orbit parameter errors which can accurately calculate the plane position error and improve the range direction absolute positioning error. The EEMDO does not require IMU precision calibration equipment or large calibration experiments and can estimate the error of Mini SAR orbital parameters quickly and efficiently, facilitating and encouraging the use of Mini SAR remote sensing systems Daha fazlası Daha az