Natural Resources Canada
www.nrcan.gc.ca
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Acronyms
1D
one dimensional
2D
two dimensional
2drms
two times distance root mean square
3D
three-dimensional
ACP
Active Control Point
ACS
Active Control System
AS
anti-spoofing
Az
azimuth
c
speed of light in a vacuum
CACS
Canadian Active Control System
CCM
Canada Centre for Mapping
CDU
control and display unit
CEP
circular error probable
CGVD28
Canadian Geodetic Vertical Datum 1928
DoD
United States Department of Defense
DOP
dilution of precision
DoT
United States Department of Transportation
EDM
electronic distance measurement
Elev.
elevation angle
f
frequency
Φ
measured carrier phase
GDOP
geometrical dilution of precision
GIS
geographical information system
GPS
Global Positioning System
GPSIC
Global Positioning System Information Center
GSD
Geodetic Survey Division
GSD95
Geodetic Survey Division 1995 geoid model
h
ellipsoidal height
H
orthometric height
HDOP
horizontal dilution of precision
Hz
hertz (cycles per second) - unit of measure for frequency
IERS
International Earth Rotation Service
ITRF
IERS Terrestrial Reference Frame
λ
wavelength
MHz
zone million hertz (see Hz)
MSE
mean square error
MTM
Modified Transverse Mercator
N
ambiguity, or
N
geoid undulation
NAD27
North American Datum 1927
NAD83
North American Datum 1983
NGDB
National Geodetic Database (maintained by GSD)
NGS
U.S. National Geodetic Survey
NRCan
Natural Resources Canada
NTS
National Topographic System
P
code measurement
PDOP
positional dilution of precision
ppm
parts per million
ρ
range
rcvr
receiver
RF
radio frequency
RINEX
receiver independent exchange format
rms
root mean square
σ
standard deviation
SA
selective availability
SEP
spherical error probable
SMRSS
Surveys, Mapping and Remote Sensing Sector
tr
reception time
tt
transmission time
UERE
user equivalent range error
UTM
Universal Transverse Mercator
VDOP
vertical dilution of precision
WGS84
World Geodetic System 1984
xr,yr,zr
receiver coordinates
xs,ys,zs
satellite coordinates
