Telit Wireless Solutions SL869T3-I, Руководство пользователя

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SL869T3-I Product User Guide
1VV0301546 Rev. 3
Page 64 of 68 2021-03-31
(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 systems are: GPS (US), GLONASS (Russia),
BeiDou (China), and Galileo (Europe). Contrast with RNSS.
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. Contrast with Server-
based prediction data.
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.
NavIC
Navigation with Indian Constellation.
The Indian regional system. Formerly called IRNSS.
Navigation
Sensitivity The lowest signal level at which a GNSS receiver is able to reliably
maintain navigation after the satellite signals have been acquired.
NMEA National Marine Electronics Association
QZSS
Quasi-Zenith Satellite System
The Japanese SBAS system (part of MSAS).
Reacquisition A receiver, while in normal operation, loses RF signal (perhaps due to
the antenna cable being disconnected or a vehicle entering a tunnel),
and re-establishes a valid fix after the signal is restored. Contrast with
Reset and Restart.