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- W2065931738 abstract "Two techniques are proposed for using laser links to measure the relative radial velocity of two spacecraft. The first technique determines the relative radial velocity from a measurement of the two-way doppler shift on a transponded radio-frequency subcarrier. The subcarrier intensity-modulates reciprocating laser beams. The second technique determines the relative radial velocity from a measurement of the two-way doppler shift on an optical frequency carrier which is transponded between spacecraft using optical Costas loops. The first technique might be used in conjunction with noncoherent optical communications, while the second technique is compatible with coherent optical communications. The first technique simultaneously exploits the diffraction advantage of laser beams and the maturity of radio-frequency phase-locked loop technology. The second technique exploits both the diffraction advantage of laser beams and the large doppler effect at optical frequencies. The second technique has the potential for greater accuracy; unfortunately, it is more difficult to implement since it involves optical Costas loops." @default.
- W2065931738 created "2016-06-24" @default.
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- W2065931738 date "1986-05-15" @default.
- W2065931738 modified "2023-10-03" @default.
- W2065931738 title "Laser Doppler Measurement Techniques For Spacecraft" @default.
- W2065931738 doi "https://doi.org/10.1117/12.961051" @default.
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