When using a GPS network that runs Topnet, the elevations I get for a point differ in Magnet Field and Magnet Tools. See attached. The elevations are consistently off by 0.37' regardless of which station I use. I have the same Geoid model loaded in both MF and MT and the same horizontal reference frame is used. The northing and easting seems to come out okay. I tried it with a Hiper SR and an Hiper II as the rover.
Station MKWA is about 3 miles away
Station WLKU is about 12 miles away
Station LHNA is about 25 miles away
Station WHWA is about 191 miles away ( I was surprised that I got a fix)
Anybody else using Topnet notice this vertical error?
antcrook, post: 456078, member: 6417 wrote: When using a GPS network that runs Topnet, the elevations I get for a point differ in Magnet Field and Magnet Tools. See attached. The elevations are consistently off by 0.37' regardless of which station I use. I have the same Geoid model loaded in both MF and MT and the same horizontal reference frame is used. The northing and easting seems to come out okay. I tried it with a Hiper SR and an Hiper II as the rover.
Station MKWA is about 3 miles away
Station WLKU is about 12 miles away
Station LHNA is about 25 miles away
Station WHWA is about 191 miles away ( I was surprised that I got a fix)Anybody else using Topnet notice this vertical error?
Look at raw data and check antenna types and heights on the base.
Also check version of software.
leegreen, post: 456082, member: 2332 wrote: Look at raw data and check antenna types and heights on the base.
Also check version of software.
Looking at the Raw Data from Magnet Field it looks like it is using the Phase Center Coords for each of the Base Stations, however it is not showing the antenna type for the Base Station even though the antenna type is being transmitted and the correct antenna type at the base is shown in Magnet Tools. The difference between Phase Center Coords and ARP coords is the 0.37'. Topnet requires the base station coords to be referenced to the ARP.