3 ms·
DGPS requires a fixed base in order to calculation the differentials I believe. Some states, like Iowa (http://www.iowadot.gov/rtn/ http://www.iowadot.gov/rtn/
by jwilberding 15y ago
DGPS requires a fixed base in order to calculation the differentials I believe.
Some states, like Iowa (http://www.iowadot.gov/rtn/ http://www.iowadot.gov/rtn/), also have real time information you can access to reduce the margin of error.