Full
Outline
This study inverts a Mascon model based on inter-satellite range-rate observations from the ChiGaM satellite mission. The strategies employed during the inversion include: 1) introducing piece-wise constant acceleration (PCA) parameters to mitigate the impact of force model errors in dynamic orbit determination; 2) applying an empirical model that considers the 3-cycle-per-revolution (3-CPR) term to absorb low-frequency noise in the range-rate data; and 3) integrating multi-source data to construct the forward model and the a priori constraint matrix for parameters. Satellite data from March 2022 to December 2023 were processed to develop the Mascon model IEU-CGS-Monthly2023M. Comparative analysis with contemporaneous Mascon products from the GRACE-FO mission shows that the mass change trends derived from our model are in high agreement with the reference models at both global and regional scales. The geoid degree errors of all models closely coincide within the dominant signal degree bands. In nine selected river basins, the average correlation coefficient between our model and the reference models exceeds 0.9. Overall, the performance of the proposed model is comparable to that of the reference models. This study demonstrates high-precision Mascon inversion using ChiGaM range-rate data, validates the satellite's capability to capture time-variable gravity signals, and can serve as a reference for related data processing and applications.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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