SE868-V3 Product User Guide
1VV0301205 r4 – 2016-01-20
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 72 of 76
Mod. 0805 2015-02 Rev.4
GDOP:
Geometric Dilution of Precision
A factor used to describe the effect of satellite geometry on the accuracy of the time and position
solution of a
GNSS
receiver. A lower value of GDOP indicates a smaller error in the solution.
Related factors include PDOP, HDOP, VDOP and TDOP.
GLONASS:
ГЛОбальная
НАвигационная
Спутниковая
Система
GLObal'naya NAvigatsionnaya Sputnikovaya Sistema
(Global Navigation Satellite System)
The Russian
GNSS,
which is operated by the Russian Aerospace Defense Forces
GNSS:
Global Navigation Satellite System
Generic term for a satellite-based navigation system with global coverage. The current or
planned systems are:
GPS, GLONASS, BDS,
and
Galileo.
GPS:
Global Positioning System
The U.S.
GNSS, a
satellite-based positioning system that provides accurate position, velocity,
and time data. GPS is operated by the US Department of Defense.
Hot Start:
A hot start occurs when a receiver begins operation with known time, position, and ephemeris
data, typically after being sent a restart command. See
Restart
.
LCC:
Leadless Chip Carrier
A module design without pins. In place of the pins are pads of bare gold-plated copper that are
soldered to the printed circuit board.
LNA:
Low Noise Amplifier
An electronic amplifier used for very weak signals which is especially designed to add very
little noise to the amplified signal.
Local Ephemeris prediction data:
Extended Ephemeris (i.e. predicted) data, calculated by the receiver from broadcast data
received from satellites, which is stored in memory. It is usually useful for up to three days. See
AGPS.
MSAS:
MTSAT
Satellite Augmentation System
The Japanese
SBAS
system.
MSD:
Moisture sensitive device.
MTSAT:
Multifunctional Transport Satellites
The Japanese system of geosynchronous satellites used for weather and aviation control.
Navigation Sensitivity:
The lowest signal level at which a GNSS receiver is able to reliably
maintain navigation after the satellite signals have been acquired.