Longitude
Longitude is the angle between the meridian ellipse which passes through Greenwich and the meridian ellipse containing the point in question.
Mask Angle
The minimum elevation angle below which no more GPS satellites are tracked by the receiver.
Max Accuracy (ClearTrack)
The tracking mode incorporating carrier phase smoothing with the highest discriminating tracking algorithms.
Max Track
Leica’s Trademark tracking technology created for dense foliage and other inhospitable environments.
Maximum Age of Correction
The amount of time a
Meridian
An imaginary line joining north to south pole and passing through the equater at 90o.
Multipath Error
A positioning error resulting from interference between split radio waves which have travelled to the receiver from differing paths.
NMEA
National Marine Electronics Association. A standered originally defined to enable marine electronics instruments, communication, and navigation equipment to communicate.
Orthometric Height
The distance of a point above the geoid (or mean sea level). Ortho = Elipsoid - Geoid.
PDOP
Positional dilution of precision. See DOP
The process of computing positions in
A measure of the apparent signal propagation time from the satellite to the receiver antenna, scaled into distance by the speed of light. Pseudorange differs from the actual range by the inlfuence of satellite and user clock.
Quality
A measure of precision calculated by residuals calculated using a 2D sigma (67% confidence)
A DGPS position calculated by correcting autonomous GPS with a differential correction.
Leica GS20 Field
97
Glossary
