| 摘要 |
A method and apparatus for determining location and indicating selected distances between points on a golf course including a base station (14) having a GPS receiver (56), computer (52), and a radio frequency transmitter or transceiver (60), and a plurality of mobile range finder units (10) each having a GPS receiver (30), a radio frequency transmitter or transceiver (34), annunciators (38, 40, 42, 44), and a key pad (50). The base station (14) uses the GPS satellite information to continuously determine injected positional and system error and to transmit offset signals to the mobile units. The mobile units use the transmitted offset signals and independently received GPS location information to calculate actual position and altitude of the mobile unit and use positional information to calculate actual distance to and between selected points on the golf course. |
