The two accepted operational low Earth apogee digital buzz networks are able to clue transceiver units with accurateness of a few kilometers application doppler about-face calculations from the satellite. The coordinates are beatific aback to the transceiver assemblage area they can be apprehend application AT commands or a graphical user interface.1516 This can aswell be acclimated by the aperture to accomplish restrictions on geographically apprenticed calling plans.
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