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D Series 4000
D.1 Introduction
The Trimble Series 4000 family of high-precision GPS receivers are
designed primarily for land survey applications, where they can be
used to obtain very high accuracy (in the millimeter range) using
Control Survey and RTK techniques.
The Series 4000 GPS receivers also provide submeter accuracy when
used for GIS data collection. Using a Trimble GIS Surveyor system
(with EVEREST capable Series 4000 receivers as both the base
station and rover) you can achieve accuracies of less than 50
centimeters with just a few measurements.
The Series 4000 receivers have a different internal architecture to the
GPS Pathfinder receivers, as befits their optimization for land survey
applications. The picture below shows the front panel of the Series
4000 receivers:
When used in conjunction with an Asset Surveyor system, there are a
number of minor differences between the behavior of a Series 4000
receiver and that of a GPS Pathfinder receiver.
For Maxwell Technology Series 4000 GPS receivers with the
EVEREST firmware option installed (for example, the 4000SSE,
4000SE System Surveyor II and 4000SSi), the postprocessed
differentially corrected accuracy (CEP) is specified as 50 cm +1 ppm,
subject to the following conditions: at least five satellites, PDOP less
than four, a base station with the EVEREST firmware installed, and a
baseline length of less than 1,000 km.
258 TSC1 Asset Surveyor Operation Manual