NavCom SF-3040 Rev.F - Manual (Page 205)

SF-3040 Product User Guide
– Rev. F
Glossary-203
COM# is the abbreviation for communications port
number. It indicates a data communications port
to/from the GNSS receiver to a controller or data
collection device.
Compact Measurement Record (CMR) is a
standard format for DGPS corrections used to
transmit corrections from a reference station to rover
receivers. See Related Standards in Notices.
controller is a device consisting of hardware and
software used to communicate and manipulate the
I/O functions of the GNSS receiver.
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 are those files that contain Proprietary,
GNSS, NMEA, RTCM, or any type of data logged
from a GNSS receiver.
datum is a known and constant reference 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 is a type of electrical connector containing 9
contacts. The P indicates a plug pin (male).
DB9S is a type of electrical connector containing 9
contacts. The S indicates a slot pin (female).
DCE (Data Communications Equipment); the defined
pin assignments are based on the IEEE RS-232
signaling standard. See Figure 61.