发明名称 |
Method and apparatus for precise noncoherent doppler tracking of a spacecraft |
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.
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申请公布号 |
US5745072(A) |
申请公布日期 |
1998.04.28 |
申请号 |
US19960717395 |
申请日期 |
1996.09.20 |
申请人 |
THE JOHNS HOPKINS UNIVERSITY |
发明人 |
JENSEN, JAMES ROBERT;BOKULIC, ROBERT STEVEN |
分类号 |
G01S7/00;G01S13/58;G01S13/60;G01S13/76;(IPC1-7):G01S13/58 |
主分类号 |
G01S7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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