Trimble SPS985 User Manual

points, lines/break lines, or boundaries/areas.
firmware
The program inside the receiver that controls receiver operations and
hardware.
Galileo
Galileo is a GNSS system built by the European Union and the European Space
Agency. It is complimentary to GPS and GLONASS.
geoid
The geoid is the equipotential surface that would coincide with the mean ocean
surface of the Earth. For a small site this can be approximated as an inclined
plane above the Ellipsoid.
GHT
Height above geoid.
GLONASS
Global Orbiting Navigation Satellite System. GLONASS is a Soviet space-based
navigation system comparable to the American GPS system. The operational
system consists of 21 operational and 3 non-operational satellites in 3 orbit
planes.
GNSS
Global Navigation Satellite System.
GSOF
General Serial Output Format. A Trimble proprietary message format.
HDOP
Horizontal Dilution of Precision. HDOP is a DOPvalue that indicates the precision
of horizontal measurements. Other DOP values include VDOP (vertical DOP) and
PDOP (Position DOP).
Using a maximum HDOP is ideal for situations where vertical precision is not
particularly important, and your position yield would be decreased by the
vertical component of the PDOP (for example, if you are collecting data under
canopy).
height
The vertical distance above the Ellipsoid. The classic Ellipsoid used in GPS is
WGS-84.
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 enters a password into the receiver. To use the server, the user
must have a Trimble Connected Community site license.
L1
The primary L-band carrier used by GPS and GLONASS satellites to transmit
satellite data.
L2
The secondary L-band carrier used by GPS and GLONASS satellites to transmit
satellite data.
L2C
A modernized code that allows significantly better ability to track the L2
frequency.
L5
The third L-band carrier used by GPS satellites to transmit satellite data. L5 will
provide a higher power level than the other carriers. As a result, acquiring and
SPS985 GNSS Smart Antenna Getting Started Guide 32

Trimble SPS985 Specifications

General

Brand	Trimble
Model	SPS985
Category	Antenna
Language	English