NavCom RT-3020 Rev.A User Manual
Page 45
RT-3020 User Guide
Glossary-43
Autonomous positioning (
GPS
) a mode of operation
in which a
GPS
receiver computes
position
fixes in real
time from satellite data alone, without reference to data
supplied by a
reference station
or orbital clock
corrections.
Autonomous positioning
is typically the
least precise positioning procedure a
GPS
receiver can
perform, yielding
position
fixes that are precise to 100
meters with Selective Availability on, and 30 meters
with S/A off.
azimuth the
azimu h
of a line is its direction as given by
the angle between the
meridian
and the line measured
in a clockwise direction from the north branch of the
meridian
.
t
base station see
reference station
.
baud rate (
bits per second
) the number of bits sent or
received each second. For example, a
baud rate
of 9600
means there is a data flow of 9600 bits each second.
One character roughly equals 10 bits.
bits per second see
baud rate
bps see
baud rate
BSW (British Standard Whitworth) a type of coarse
screw thread. A 5/8” diameter
BSW
is the standard
mount for survey instruments.
C/A code see
Coarse Acquisition code
.
CAN BUS a balanced (differential) 2-wire interface that
uses an asynchronous transmission scheme. Often used
for communications in vehicular applications.
channel a
channel
of a
GPS
receiver consists of the
circuitry necessary to receive the signal for a single
GPS
satellite.