| 摘要 |
A knocked-down portable geodetic surveying station in kit form is disclosed which utilizes a GPS antenna attached to the top portion of a surveyor's stake, or other type monopole. By positioning the bottom portion of the monopole directly upon a desired ground location, and adjusting the angular position of the monopole so that it is precisely vertical, the GPS antenna may be quickly and accurately positioned level and directly above the desired ground location. The GPS antenna and monopole are designed to be used in conjunction with a newly designed geodetic surveying tripod which can be quickly and conveniently set up to support the monopole in its vertical position directly above the desired ground location. The tripod of the present invention includes a tripod head which comprises a base platform, a first housing slidably mounted on the platform to permit the first housing to move along a first directional path, and a second housing slidably mounted within the first housing to permit the second housing to move along a second directional path, generally orthogonal to the first directional path. Mounted pivotally within the second housing is a gimbal which includes a central cavity for receiving the shaft of the monopole. The gimbal allows the angular position of the monopole and GPS antenna to be adjusted independently of the angular position tripod platform.
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