After 10 years’ construction, the regional BeiDou Navigation Satellite System final network satellite was launched on October 25, 2012, formally providing free positioning, navigation, timing and short message servic...After 10 years’ construction, the regional BeiDou Navigation Satellite System final network satellite was launched on October 25, 2012, formally providing free positioning, navigation, timing and short message services to users in the Asia-Pacific region since December, 2012. As a national major infrastructure, the BeiDou system is a long-term strategic development project of China and attracted strong support by the Chinese top leaders. SYSTEM CONSTRUCTION Development Goal The BeiDou Navigation Satellite System aims at supplying stable, reliable and quality satellite navigation services for customers worldwide, serving the globe and benefiting mankind. The construction of the system is being implemented展开更多
Wheel-off-loadings and orbital maneuvers of the GEO satellite result in additional accelerations to the satellite itself. Complex and difficult to model, these time varying accelerations are an important error source ...Wheel-off-loadings and orbital maneuvers of the GEO satellite result in additional accelerations to the satellite itself. Complex and difficult to model, these time varying accelerations are an important error source of precise orbit determination (POD). In most POD practices, only non-maneuver orbital arcs are treated. However, for some applications such as satellite navigation RDSS services, uninterrupted orbital ephemeris is demanded, requiring the development of POD strategies to be processed both during and after an orbital maneuver. We in this paper study the POD for a maneuvered GEO satellite, using high precision and high sampling rate ranging data obtained with Chinese Area Positioning System (CAPS). The strategy of long arc POD including maneuver arcs is studied by using telemetry data to model the maneuver thrust process. Combining the thrust and other orbital perturbations, a long arc of 6 days’ CAPS ranging data is analyzed. If the telemetry data are not available or contain significant errors, attempts are made to estimate thrusting parameters using CAPS ranging data in the POD as an alternative to properly account for the maneuver. Two strategies achieve reasonably good data fitting level in the tested arc with the maximal position difference being about 20 m.展开更多
文摘After 10 years’ construction, the regional BeiDou Navigation Satellite System final network satellite was launched on October 25, 2012, formally providing free positioning, navigation, timing and short message services to users in the Asia-Pacific region since December, 2012. As a national major infrastructure, the BeiDou system is a long-term strategic development project of China and attracted strong support by the Chinese top leaders. SYSTEM CONSTRUCTION Development Goal The BeiDou Navigation Satellite System aims at supplying stable, reliable and quality satellite navigation services for customers worldwide, serving the globe and benefiting mankind. The construction of the system is being implemented
基金Supported by the National Natural Science Foundation of China (Grant No. 10703011)the Science & Technology Commission of Shanghai Municipality of China (Grant No. 06DZ22101)
文摘Wheel-off-loadings and orbital maneuvers of the GEO satellite result in additional accelerations to the satellite itself. Complex and difficult to model, these time varying accelerations are an important error source of precise orbit determination (POD). In most POD practices, only non-maneuver orbital arcs are treated. However, for some applications such as satellite navigation RDSS services, uninterrupted orbital ephemeris is demanded, requiring the development of POD strategies to be processed both during and after an orbital maneuver. We in this paper study the POD for a maneuvered GEO satellite, using high precision and high sampling rate ranging data obtained with Chinese Area Positioning System (CAPS). The strategy of long arc POD including maneuver arcs is studied by using telemetry data to model the maneuver thrust process. Combining the thrust and other orbital perturbations, a long arc of 6 days’ CAPS ranging data is analyzed. If the telemetry data are not available or contain significant errors, attempts are made to estimate thrusting parameters using CAPS ranging data in the POD as an alternative to properly account for the maneuver. Two strategies achieve reasonably good data fitting level in the tested arc with the maximal position difference being about 20 m.
