Bipod for Prism Pole Total Station Surveying (B-4)
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Survey Bipod for Prism Pole (B-4)
1 This Dual Hinge Bipod with Twist Lever Lock is the perfect solution for setups on difficult terrain.
2 The new dual leg hinges move in two directions.
3 This bipod sets up fast on rocky, steep slopes, construction sites, or industrial sites where surrounding material may be in the way of proper leg placement.
4 The push button thumb release legs on the Dual Hinge Bipod are the same as the field proven original open clamp tripod.
5 The legs collapse to 110cm and extend to 180cm
6 Fits 1 to 1.25 inch diameter poles through the open clamp or 1.5 inch poles through the top
The basis of GPS is “triangulation” from satellites.
We’re using the word “triangulation” very loosely here because it’s a word most people can understand, but purists would not call what GPS does “triangulation” because no angles are involved. It’s really “trilateration.”
Trilateration is a method of determining the relative positions of objects using the geometry of triangles.
To “triangulate,” a GPS receiver measures distance using the travel time of radio signals.
To measure travel time, GPS needs very accurate timing which it achieves with some tricks.
Along with distance, you need to know exactly where the satellites are in space. High orbits and careful monitoring are the secret.
Finally you must correct for any delays the signal experiences as it travels through the atmosphere.