초록 ▼

A method of simultaneously measuring orthometric and geometric heights is provided. Simultaneous Global Positioning System (GPS) and level surveying is proposed to more efficiently obtain certain geodetic measurements. GPS receiver antennas are attached to the top of leveling rods and GPS measuremen

A method of simultaneously measuring orthometric and geometric heights is provided. Simultaneous Global Positioning System (GPS) and level surveying is proposed to more efficiently obtain certain geodetic measurements. GPS receiver antennas are attached to the top of leveling rods and GPS measurements are taken while a level survey is performed. This procedure enables precise estimates in differences between the change in orthometric height and change in geometric height to be determined along baselines.

대표청구항 ▼

A method of simultaneously determining relative orthometric and geometric heights comprising the steps of: continuously transmitting encoded radio frequency (RF) signals from a plurality of Global Positioning System (GPS) earth-orbiting satellites, such that the transmitted RF signals of each GPS ea

A method of simultaneously determining relative orthometric and geometric heights comprising the steps of: continuously transmitting encoded radio frequency (RF) signals from a plurality of Global Positioning System (GPS) earth-orbiting satellites, such that the transmitted RF signals of each GPS earth-orbiting satellite are a pair of encoded RF signals at predetermined frequencies that are directed in a radial direction towards the earth\s surface, all GPS satellites of the plurality of satellites progressively and continuously advancing about the earth in relation to the field of view of a GPS receiver; measuring, based upon the encoded RF signals, a first height differential between the earth\s surface and a reference surface, said first height differential being measured over the length of a baseline of said reference surface; and simultaneously surveying the earth\s surface along said reference baseline to determine a second height differential between the earth\s surface and a geoid line representative of mean sea level.