Virtual Dictionary
WRS
WRS or Wide area ground Reference Station is the name of a ground station in the WAAS GPS sensor grid. These function in the exact same way as GPS satellites, providing a lower-altitude signal to use in conjunction with the satellites to work out the Z factor or height positional information.
WRS station signals suffer from terrain LOS issues such as mountains or dense urban areas blocking the signal. Therefore as many WRS stations as possible are utilised to provide data which is then sent to a WMS station prior to transmission back to the recipient.
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