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

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