NavCom SF-3050 Rev.I - Manual (Page 189)

SF-3050 GNSS Product User Guide – Rev I
G-170
Coarse Acquisition code (C/A or Civilian code)
the pseudo-random code generated by GPS satellites. It is intended for civilian use and
the accuracy of readings using this code can be degraded if selective availability (S/A) is
introduced by the US Department of Defense.
COM# shortened form of the word Communications. Indicates a data communications
port to/from the GPS sensor to a controller or data collection device.
Compact Measurement Record (CMR) a standard format for DGPS corrections used to
transmit corrections from a reference station to rover sensors. See Related Standards in
Notices.
controller a device consisting of hardware and software used to communicate and
manipulate the I/O functions of the GPS sensor.
convergence period (StarFire) is the time necessary for the received StarFire signal
corrections to be applied and the position filtered to optimal performance. The
convergence period is typically 30 to 45 minutes to achieve <decimeter accuracy. This
period may be overcome using the Quick Start method.
data files files that contain Proprietary, GPS, NMEA, RTCM, or any type of data logged
from a GPS receiver.
datum A reference datum is a known and constant surface that can be used to describe
the location of unknown points. Geodetic datums define the size and shape of the earth
and the origin and orientation of the coordinate systems used to map the earth.
DB9P a type of electrical connector containing 9 contacts. The P indicates a plug pin
(male).
DB9S a type of electrical connector containing 9 contacts. The S indicates a slot pin
(female).
DCE Data Communications Equipment. Defined pin assignments based on the IEEE RS-
232 signaling standard. See Figure 82:
Figure 120: DTE to DCE RS-232 Pin Assignments