C-Nav 2050M User Manual - page 157
C-Nav2050 User Guide
the
ot of the average squared
dev
lues from the mean.
Tim
appended to an
actu
en epochs (time) is the difference
o
rd
S) is a set of
lites, which are valid for the
orate satellite orbit and
hich are valid for a
m 1984 (WGS84) is the current
mean. It is the square ro
iations of each of the va
e Tag is when a time value is
al measurement.
Triple Difference between receivers, between
satellites, and betwe
between a double difference at one epoch and the
same double difference at the following epoch.
Troposphere is the inner layer of the atmosphere,
located between 6 and 12 miles above the earth’s
surface.
Twice Distance Root Mean Square (2dRMS) is a
measurement that varies in its probability from 95.4% t
98.2%, meaning that if 100 observations are taken,
between 95 and 98 of those observations will be within
the 2dRMS where approximation = 2ơ
Universal Time Coordinated (UTC) a time standa
maintained by the US Naval Observatory, based on
local solar mean time at the Greenwich meridian. GPS
time is based on UTC.
User Segment is the portion of the GPS system with
major components that can be interfaced by the user
(e.g., GPS receivers).
Wide Area Augmentation System (WAA
corrections for the GPS satel
Americas region. They incorp
clock corrections.
Wide Area Differential GPS (WADGPS) is a set of
corrections for the GPS satellites, w
wide geographic area.
World Geodetic Syste
standard datum for global positioning and surveying.
The WGS-84 is based on the GRS-80 ellipsoid.
G-25