
AirPrime XS1110 AT Command Reference
Rev 3.1 Jul.20
52
41113737
NMEA
The National Marine
Electronics Association
This is a standard data format supported by all
GPS manufacturers. The output definition
consists of latitude, longitude, time, etc.
PPS
pulse-per-second
This is an electrical signal that has a width of
less than one second, with edges that sharply
increases or abruptly decreases and repeats
accurately and precisely once per second. In
this application, PPS signals are output by GPS
receivers.
PVT
Position, Velocity, Time
A GPS receiver is an L-Band radio processor
capable of addressing navigation equations that
decide the user’s position, velocity, and precise
time by dealing with the signal broadcasted by
GPS satellites.
QZSS
Quasi-Zenith Satellite System
This is a four-satellite regional time transfer
system and a satellite-based augmentation
system development operated by Japan.
RTC
Real-Time Clock
This is present in almost any electronic device
that needs to have an accurate time.
SBAS
Satellite-based Augmentation
Systems
The accuracy and reliability of GNSS
information are improved by SBAS via
correcting signal measurement errors and via
providing information about the accuracy,
integrity, continuity and availability of its signals.
These systems also support wide-area or
regional augmentation by applying the additional
satellite-broadcast messages. Correction
messages are created and sent to one or more
satellites for broadcast from the ground stations
used measurements to end users as differential
signal.
SGE
Self Generated Ephemeris
Predicts satellite orbit information (ephemeris)
with high accuracy by accumulating satellite
information internally for more than one day.
TCXO
Temperature Compensate X’tal
(crystal) Oscillator
A TCXO adjusts the frequency of the oscillator
to compensate for the changes that will occur
because of temperature changes.
VDOP
Vertical Dilution of Precision
This measures the geometric quality of a GPS
satellite configuration in the sky. VDOP is a
factor that determines the relative accuracy of a
vertical position.
Table B
-
1: Acronyms and Definitions (Continued)
Abbreviation
Meaning
Definition