Sensitivity analysis of KBR and ACC load noise for SST-LL gravity satellite
The time-varying gravity field calculated from low and low satellite tracking observation data is an important means to detect and analyze global mass change and migration.In this paper,the influence of inter satellite distance variability error and accelerometer error on the precision of gravity field model is analyzed by using one month low tracking mode satellite simulation observation data.The results show that:based on the accelerometer observation error of 3x10-10 m/s2 and the distance variation observation error of 5×10-7 m/s,when the accelerometer error increases by an order of magnitude,the cumulative order error of gravity anomaly truncated to 120 orders is 3.39 mGal;when the inter satellite distance variability error increases by an order of magnitude,the cumulative order error of gravity anomaly truncated to 120 orders is 12.39 mGal,which is far greater than the reference design index of 2 mGal.The analysis show that the inter satellite distance variation error is more sensitive to the precision of gravity field model than the accelerometer error.This has important reference significance for the design of SST-LL gravity satellite and the data preprocessing.
the gravity satellitelow low satellite tracking modeintersatellite distance variabilityaccelerometersensitivity analysis
万方数据
维普
