APOD mission status and preliminary results |
| |
Authors: | Tang Geshi Li Xie Cao Jianfeng Liu Shushi Chen Guangming Man Haijun Zhang Xiaomin Shi Sihan Sun Ji Li Yongping Calabia Andres |
| |
Affiliation: | 1.Nanjing University of Information Science & Technology (NUIST), Nanjing, 210044, China ;2.Aerospace Flight Dynamics Laboratory (AFDL), Beijing Aerospace Control Center (BACC), Beijing, 100094, China ;3.China Spacesat Co. Ltd., Beijing, 100094, China ;4.National Space Science Center (NSSC), Chinese Academy of Sciences, Beijing, 100190, China ; |
| |
Abstract: | On September 20 th, 2015, twenty satellites were successfully deployed into a near-polar circular orbit at 520 km altitude by the Chinese CZ-6 test rocket, which was launched from the Tai Yuan Satellite Launch Center. Among these satellites, a set of 4 Cube Sats conform the atmospheric density detection and precise orbit determination(APOD) mission, which is projected for atmospheric density estimation from in-situ detection and precise orbit products. The APOD satellites are manufactured by China Spacesat Co. Ltd. and the payload instruments include an atmospheric density detector(ADD), a dual-frequency dualmode global navigation satellite system(GNSS) receiver(GPS and Beidou), a satellite laser ranging(SLR) reflector, and an S/Xband very long baseline interferometry(VLBI) beacon. In this paper, we compare the GNSS precise orbit products with colocated SLR observations, and the 3 D orbit accuracy shows better than 10 cm RMS. These results reveal the great potential of the onboard micro-electro-mechanical system(MEMS) GNSS receiver. After calibrating ADD density estimates with precise orbit products, the accuracy of our density products can reach about 10% with respect to the background density. Density estimates from APOD are of a great importance for scientific studies on upper atmosphere variations and useful for model data assimilation. |
| |
Keywords: | Atmospheric density Low Earth orbit(LEO) Precise orbit determination(POD) |
本文献已被 CNKI 维普 SpringerLink 等数据库收录! |
|