Trimble SCS900 User Manual

Glossary
latitude, longitude, and height.
IBSS
Internet Base Station Service. This Trimble service makes the setup of an Internet-
capable receiver as simple as possible. The base station can be connected to the
Internet (cable or wirelessly). To access the distribution server, the user enter a
password into the receiver. To use the server, the user must have a Trimble Connected
Community site license.
Location GPS
Location GPS covers decimeter to submeter GPS positioning techniques including
Satellite Based Augmentation Systems (SBAS) such as WAAS, EGNOS, and MSAS), DGPS
(reference station and rover operations), OmniSTAR VBS/HP/XP services, and Location
RTK (decimeter-level RTK positioning).
Location RTK
Some applications such as vehicular-mounted site supervisor systems do not require
Precision RTK accuracy. Location RTK is a mode in which, once initialized, the receiver
will operate either in 10 cm horizontal and 10 cm vertical accuracy, or in 10 cm
horizontal and 2 cm vertical accuracy.
Precision GPS
GPS positioning provided by techniques that typically deliver centimeter-level accuracy.
These include RTK (Real-Time Kinematic) techniques and signals obtained from a VRS
(Virtual Reference Station) system.
postprocessing
Postprocessing is the processing of satellite data after it is collected, in order to
eliminate error. This involves using computer software to compare data from the rover
with data collected at the base station.
real-time differential
GPS
Also known as real-time differential correction or DGPS. Real-time differential GPS is the
process of correcting GPS data as you collect it. Corrections are calculated at a base
station and then sent to the receiver through a radio link. As the rover receives the
position it applies the corrections to give you a very accurate position in the field.
Most real-time differential correction methods apply corrections to code phase
positions.
While DGPS is a generic term, its common interpretation is that it entails the use of
single-frequency code phase data sent from a GNSS base station to a rover GNSS
receiver to provide sub-meter position accuracy. The rover receiver can be at a long
range (greater than 100 kms (62 miles)) from the base station.
Road job
A road job is the term that defines a complete road model within the Terramodel and
SCS700 software. It is a collection of roadway information that is expected to function
together to define a roadway or a portion of a roadway between specific stationing
limits. A road job contains the main alignment and all sub alignments, the road
templates, and all the information used to define widening and super elevation for the
road. A single project can contain multiple road jobs for different roads also contained
within that single construction project.
road model
The road model used by the SCS700 software is a Trimble Terramodel PRO file. This file
can be used for both staking and grade checking operations. The Road model is a
template based model that provides full accuracy anywhere within the roadway
surface.
rover receiver
A rover is any mobile GNSS receiver that is used to collect or update data in the field,
typically at an unknown location.
Roving mode
Roving mode applies to the use of a rover receiver to collect data, stakeout, or control
earthmoving machinery in real time using RTK techniques.
Trimble SCS900 Site Controller Software User Guide 121

Trimble SCS900 Specifications

General

Brand	Trimble
Model	SCS900
Category	Controller
Language	English