Analysis of COSMIC-2 Atmospheric Boundary Layer Detection Ability

摘要

Using Global Navigation Satellite System (GNSS) radio occultation technology to detect atmospheric boundary layer height (ABLH) accurately has always been a difficult point in the field of satellite navigation research. Moreover, atmospheric boundary layer is a key parameter when studying climatology. With the Constellation Observing System for Meteorology. Ionosphere, and Climate (COMSIC)-2 occultation launching in June 2019, it enhances the ability to observe radio occultation events in the lower atmosphere and provides new and vast profile data for ABLH estimating. In this study, the ABLH detection capability of COSMIC-2 is analyzed from two aspects: effective detection quantity and inversion accuracy. Based on the dry and wet refractivity data of COSMIC-2. the ABLH values are calculated adopting the refractivity gradient method (RGM). And zbalmax and global radiosonde data, as well as COSMIC, are employed for evaluating the ABLH estimation accuracy of COSMIC-2. In the comparison, we can know that the good performance of radio occultation load in COSMIC-2 constellation provides richer and high-quality raw data for atmospheric boundary layer detection. More effective detection quantity can be obtained by using COSMIC-2 data, and the accuracy is also comparable to COSMIC.