Adjustable box-wing model for solar radiation pressure impacting GPS satellites
Adjustable box-wing model for solar radiation pressure impacting GPS satellites
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DOI：
10.1016/j.asr.2012.01.016
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发表时间：
2012-04-01
影响因子：
2.6
通讯作者：
Steigenberger, P.
中科院分区：
文献类型：
--
作者：
Rodriguez-Solano, C. J.;Hugentobler, U.;Steigenberger, P.
影响全球定位系统（GPS）卫星轨道的主要不确定性来源之一是太阳直接辐射压力。本文提出了一种新的GPS卫星太阳辐射压力模型，该模型基于箱形翼卫星模型，并假设名义姿态。箱形翼模型以太阳辐射与卫星表面之间的物理相互作用为基础，可以进行调整以适应GPS跟踪数据，为了补偿太阳辐射压力的影响，国际导航卫星系统服务（IGS）分析中心采用了各种方法，从基于在轨行为的纯经验模型到基于发射前航天器结构分析的物理模型。然而，由于卫星姿态偏离标称值、光学特性已知不准确或表面老化等原因，物理模型不能很好地预测卫星的真实的轨道行为，本文提出的可调盒翼模型是介于物理/解析模型和经验模型之间的一种中间方法。箱翼模型主要通过调整卫星表面的光学特性来拟合跟踪数据。此外，估计所谓的Y偏置和与太阳能电池板围绕其旋转轴的旋转滞后角（Block II/IA为约1.5度，Block IIR为约0.5度）相关的参数。这最后一个参数，以前没有确定的GPS卫星，是一个关键因素，精确的轨道determination.For这项研究的GPS轨道生成的基础上，一年（2007年）的跟踪数据，与处理方案来自中心的轨道确定在欧洲（CODE）。计算了两种解，一种使用可调箱翼模型，一种使用CODE经验模型。利用今年的数据，估计参数和轨道进行了分析。在考虑轨道重叠和轨道预测误差时，两种模型的性能相当。然而，这些模型显示，1-2厘米高度的轨道和总加速度（高达5 x 10（-9）m/s（2））之间存在重大差异。这主要是由于箱翼模型是基于太阳辐射与卫星之间的物理相互作用，而CODE经验模型不是。(C)2012年空间研委会。由爱思唯尔有限公司出版。保留所有权利。
One of the major uncertainty sources affecting Global Positioning System (GPS) satellite orbits is the direct solar radiation pressure. In this paper a new model for the solar radiation pressure on GPS satellites is presented that is based on a box-wing satellite model, and assumes nominal attitude. The box-wing model is based on the physical interaction between solar radiation and satellite surfaces, and can be adjusted to fit the GPS tracking data.To compensate the effects of solar radiation pressure, the International GNSS Service (IGS) analysis centers employ a variety of approaches, ranging from purely empirical models based on in-orbit behavior, to physical models based on pre-launch spacecraft structural analysis. It has been demonstrated, however, that the physical models fail to predict the real orbit behavior with sufficient accuracy, mainly due to deviations from nominal attitude, inaccurately known optical properties, or aging of the satellite surfaces.The adjustable box-wing model presented in this paper is an intermediate approach between the physical/analytical models and the empirical models. The box-wing model fits the tracking data by adjusting mainly the optical properties of the satellite's surfaces. In addition, the so called Y-bias and a parameter related to a rotation lag angle of the solar panels around their rotation axis (about 1.5 degrees for Block II/IA and 0.5 degrees for Block IIR) are estimated. This last parameter, not previously identified for GPS satellites, is a key factor for precise orbit determination.For this study GPS orbits are generated based on one year (2007) of tracking data, with the processing scheme derived from the Center for Orbit Determination in Europe (CODE). Two solutions are computed, one using the adjustable box-wing model and one using the CODE empirical model. Using this year of data the estimated parameters and orbits are analyzed. The performance of the models is comparable, when looking at orbit overlap and orbit prediction errors. Nevertheless, the models show important differences between orbits at the 1-2 cm level and total accelerations (up to 5 x 10(-9) m/s(2)). The differences are mainly due to the fact that the box-wing model is based on the physical interaction between solar radiation and satellite, while the CODE empirical model is not. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.