A laser ranging instrument is being developed to measure the spatial variations in the Earth's gravity field. It will range in space to a cube corner on a passive co-orbiting sub-satellite with a velocity accuracy of 20 to 50 microns/sec by using AlGaAs lasers intensity modulated at 2 GHz.


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    Semiconductor laser-based ranging instrument for earth gravity measurements

    Abshire, James B. / Millar, Pamela S. / Sun, Xiaoli | NTRS | 1995


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    European Patent Office | 2015

    Free access