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1.发明授权Method and apparatus for precise noncoherent doppler tracking of a spacecraft 失效用于航天器的精确非相干多普勒跟踪的方法和装置
公开(公告)号：US5745072A
公开(公告)日：1998-04-28
申请号：US717395
申请日：1996-09-20
CPC分类号： G01S13/765 , G01S13/58 , G01S13/60 , G01S7/003
摘要： A method and apparatus are disclosed for making precise velocity measurements of a spacecraft using a two-way noncoherent Doppler tracking system. By comparing the received uplink and transmitted downlink frequencies on-board the spacecraft, information is generated that is included in the downlink signal and used to cancel spacecraft oscillator drift rate effects in the two-way Doppler measurement made by the ground station. This data can also be used to characterize the drift rate of the spacecraft oscillator, thus permitting periods of accurate one-way Doppler tracking by the ground station.
摘要翻译： 公开了一种使用双向非相干多普勒跟踪系统对航天器进行精确速度测量的方法和装置。 通过比较航天器上接收到的上行链路和发射的下行链路频率，生成包含在下行链路信号中的信息，并用于取消由地面站进行的双向多普勒测量中的航天器振荡器漂移率效应。 该数据也可用于表征航天器振荡器的漂移速率，从而允许由地面站进行精确的单向多普勒跟踪的周期。
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2.发明授权Method and apparatus for precise noncoherent doppler tracking of a spacecraft 失效用于航天器的精确非相干多普勒跟踪的方法和装置
公开(公告)号：US5995039A
公开(公告)日：1999-11-30
申请号：US66516
申请日：1998-04-24
CPC分类号： G01S13/58 , G01S13/765 , G01S13/60 , G01S7/003
摘要： A method and apparatus are disclosed for making precise velocity measurements of a spacecraft using a two-way noncoherent Doppler tracking system. The received uplink and transmitted downlink frequencies on-board the spacecraft are compared with the resulting information being included in the downlink signal and used to cancel spacecraft oscillator drift rate effects in the two-way Doppler measurement made by the ground station. The information can also be used to characterize the drift rate of the spacecraft oscillator, thus permitting periods of accurate one-way Doppler tracking by the ground station. To improve accuracy, the times at which the measurements comprising the information would have been observed on the ground are inferred from the measurement of a signal generated by the spacecraft, e.g., the telemetry frame start times, made by the ground station.
摘要翻译： 公开了一种使用双向非相干多普勒跟踪系统对航天器进行精确速度测量的方法和装置。 将在航天器上接收的上行链路和发送的下行链路频率与包括在下行链路信号中的所得信息进行比较，并用于取消由地面站进行的双向多普勒测量中的航天器振荡器漂移速率效应。 该信息还可用于表征航天器振荡器的漂移速率，从而允许地面站进行精确的单向多普勒跟踪的周期。 为了提高准确性，从地面站产生的由航天器产生的信号的测量（例如，遥测帧开始时间）的测量中推断出包含信息的测量结果将在地面上观测到的时间。
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公开(公告)号：US07139567B2
公开(公告)日：2006-11-21
申请号：US10847942
申请日：2004-05-18
IPC分类号： H04B7/185
CPC分类号： H04B7/18506
摘要： This disclosure presents a communication receiver system for spacecraft that includes an open loop receiver adapted to receive a communication signal. An ultrastable oscillator (USO) and a tone detector are connected to the open loop receiver. The open loop receiver translates the communication signal to an intermediate frequency signal using a highly stable reference frequency from the USO. The tone detector extracts commands from the communication signal by evaluating the difference between tones of the communication signal.
摘要翻译： 本公开提供了一种用于航天器的通信接收机系统，其包括适于接收通信信号的开环接收器。 一个超稳定振荡器（USO）和一个音调检测器连接到开环接收器。 开环接收器使用来自USO的高度稳定的参考频率将通信信号转换为中频信号。 音调检测器通过评估通信信号的音调之间的差异来从通信信号中提取命令。
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