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- W2433124708 abstract "The HartRAO Lunar Laser Ranger (LLR) system requires a state-of-the-art software tool that enables optimal efficiency and signal path parameter estimation. The existing link budget equation estimates the number of returned photons for given conditions and LLR system parameters. This equation is one of the essential mathematical tools that can be considered when developing an integrated system and model for the LLR. The mathematical tool, still under development at HartRAO, can be used to estimate and visualize the relationship between the returned number of photons (observed and computed) and the varying link budget equation parameters. In this work, the tool is used to indicate “worse and optimal” parameter values which influence the return signal, presented as an estimate of expected number of returned photons for the HartRAO station. This is all done to achieve optimal efficiency in the LLR signal path in order to yield an improvement in the return-energy of the laser so that ranges to the lunar corner cube retroreflectors can be measured accurately. The geographic position of the HartRAO station, new state-of-the-art HartRAO LLR system under development and the expected number of returned photons will enable HartRAO to play a key role in improving the ranging accuracy to a sub-centimetre level. This will enhance the current effort to determine highly accurate Earth-Moon distances for various scientific purposes such as Lunar Ephemeris, determination of Universal Time and rate of change of the gravitational constant, G ." @default.
- W2433124708 created "2016-06-24" @default.
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- W2433124708 date "2016-03-01" @default.
- W2433124708 modified "2023-09-27" @default.
- W2433124708 title "Variable link equation parameters and expected photon returns for the HartRAO Lunar Laser Ranger - Improving our understanding of the Earth-Moon system" @default.
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- W2433124708 doi "https://doi.org/10.2113/gssajg.119.1.77" @default.
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