Research on Error Analysis and Correction Technique of Atmospheric Refraction for InSAR Measurement with Distributed Satellites

Guo-jun, HU; Zhang, Li; Li, Gang; Gong, Hui; Qin, Jinchun

doi:10.4236/jcc.2016.415014

Cited by 1 publication

(1 citation statement)

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“…In this study, real-time correction methods for tropospheric and ionospheric range errors are given on the basis of radiometer and GNSS measurement data; these methods are adopted to meet the needs of high-accuracy measurement and control systems for highorbit targets at a height of more than 2000 km. Briefly, Marcor technology and the adaptive grid method are adopted to calculate the refraction error correction for the troposphere and ionosphere [21], respectively. In addition, a comprehensive calibration test of range error due to refraction is conducted using a combination of laser radar and the CAPS system in Kunming.…”

Section: Introductionmentioning

confidence: 99%

Integrated High-Accuracy Correction Technology of Radio-Wave Refraction for Deep-Space (High-Orbit) Targets

et al. 2021

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The radio-wave refraction error caused by the troposphere and ionosphere badly affects accuracy in terms of the navigation, positioning, measurement, and control of a target; it is the main source of errors in high-accuracy measurement and control systems. The high-accuracy technology needed for radio-wave refraction error correction (mainly in the troposphere and ionosphere) has been the focus of research for a long time. At present, the correction methods used for radio-wave refraction errors have a low accuracy. For an S-band radio-wave signal, the accuracy of refraction error correction can generally only reach m-level (elevation angle of 15° and above), and thus has difficulty meeting the requirements of dm-level accuracy refraction error correction for deep-space and high-orbit targets. To improve the accuracy of radio-wave refraction error correction for deep-space and high-orbit targets, a novel correction method for tropospheric and ionospheric range error due to refraction is proposed in this study, on the basis of the measured data from a water vapor radiometer and dual-frequency Global Navigation Satellite System (GNSS). The comprehensive calibration test is conducted in combination with the Chinese Area Positioning System (CAPS) in Kunming. Results show that this method can effectively correct the range error due to refraction that is caused by the troposphere and ionosphere. For an S-band radio-wave signal, the accuracy of refraction error correction can reach dm-level accuracy (elevation angle of 15° and above), which is 50% higher than that achieved with traditional methods. This work provides an effective support system for major projects, such as lunar exploration and Mars exploration.

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Section: Introductionmentioning

confidence: 99%