NavCom SF-2040 Rev.F - Manual (Page 81)

SF-2040 User Guide – Rev. F
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 which 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 the Figure G-1:
Glossary-79