GNSS receiver for Q-Sat and its analysis of precise orbit determination
GNSS receiver for Q-Sat and its analysis of precise orbit determination
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Q-Sat GNSS接收机及其精密定轨分析
DOI：
10.1016/j.actaastro.2022.08.031
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发表时间：
2022-08
影响因子：
3.5
通讯作者：
Zhaokui Wang
中科院分区：
文献类型：
--
作者：
Yingkai Cai;Zhaokui Wang
地球重力场和高层大气是非常重要的科学信息，通过卫星精密轨道反演可以得到它们的力学模型。理想的做法是发展一个由分布在不同轨道上的卫星组成的星座，以测量大气阻力和重力。基于这一想法，清华大学研制了一颗用于测量重力场和高层大气密度的微卫星Q-Sat。低成本、高精度的测量可以大大提高科学飞行任务的成本效益。提出了一种基于商用现成GNSS接收机的空间修正方法。接收机的基本模块是一个地面通用设备，这种改装方法允许工业级设备的空间批量改装。改进后的接收机成功地应用于Q-Sat卫星，获得了大量连续的在轨数据。数据分析结果表明，该接收机能够在高动态空间环境下同时接收GPS-L1\L2和BD 1\BD 2多频导航卫星信号。为减小精密定轨误差，采用天线中心模型对GNSS观测值进行了修正，使长期定轨精度稳定在厘米级。基于商用现成GNSS接收机的修正方法和精密定轨策略可为低成本、高精度微小卫星提供参考。
The Earth's gravity field and upper atmosphere are very important scientific information and their mechanical models can be obtained by inversion of the satellite precision orbit. It would be ideal to develop a constellation of satellites distributed with different orbits to measure atmospheric drag and gravity. Based on this idea, Tsinghua University developed a microsatellite Q-Sat for measuring the gravity field and the density of the upper atmosphere. Low-cost, high-precision measurements can greatly improve the cost effectiveness of scientific missions. In this paper, a spatial modification method for GNSS receivers based on commercial off-the-shelf was proposed. The base module of the receiver is a ground-based general-purpose device, and this modification method allows for the space-batch modification of industrial-grade devices. The modified receiver was successfully applied to the Q-Sat and a large amount of continuous on-orbit data were obtained. Data analysis results show that the receiver can simultaneously receive GPS-L1\L2 and BD1\BD2 multifrequency navigation satellite signals in the highly dynamic spatial environment. To reduce the precision orbit determination error, the GNSS observations were corrected by antenna center modelling, and the long-term orbit determination accuracy is stabilized at the centimeter level. The commercial off-the-shelf based GNSS receiver modification method and precision orbit determination strategy can provide a reference for low-cost and high-precision microsatellites.
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影响因子：
16.6
作者：
Montagner, Jean-Paul;Juhel, Kevin;Barsuglia, Matteo;Ampuero, Jean Paul;Chassande-Mottin, Eric;Harms, Jan;Whiting, Bernard;Bernard, Pascal;Clevede, Eric;Lognonne, Philippe
通讯作者：
Lognonne, Philippe
DOI：
--
发表时间：
2011
期刊：
--
影响因子：
--
作者：
R. Savcenko;W. Bosch
通讯作者：
R. Savcenko;W. Bosch
DOI：
10.1007/s42341-020-00255-3
发表时间：
2020-11
影响因子：
1.9
作者：
S. Bala;Raj Kumar;Arvind Kumar
通讯作者：
S. Bala;Raj Kumar;Arvind Kumar
DOI：
10.2514/6.2006-6167
发表时间：
2006-08
期刊：
--
影响因子：
--
作者：
F. Marcos;B. Bowman;R. Sheehan
通讯作者：
F. Marcos;B. Bowman;R. Sheehan
影响因子：
1.6
作者：
J. Hoffman;W. B. Hanson;C. Lippincott;E. Ferguson
通讯作者：
J. Hoffman;W. B. Hanson;C. Lippincott;E. Ferguson