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How is the antenna height of an EPN station measured ?

April 26, 2017antenna EPN height measured station

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How is the antenna height of an EPN station measured ?

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The antenna height of a station is the vertical height difference between the antenna marker on the ground and the Antenna Reference Point (ARP). The file antenna.gra describes for each antenna used within the IGS and EPN the conventional Antenna Reference Point that should be used to determine the antenna height. The antenna.gra file is maintained by the IGS Central Bureau.