Figure 46: Dte To Dce Rs-232 Pin Assignments - Oceaneering C-NavX1 User Manual

Deflection of the Vertical is the angle between the perpendicular to the geoid (plumb line) and the perpendicular
to the ellipsoid.
DGNSS see Dif f erential GPS / GNSS.
DGPS see Dif f erential GPS / GNSS.
Differencing is a technique used in baseline processing to resolve the integer cycle ambiguity and to reduce a
number of error sources including oscillator variations and atmospheric and orbital modeling errors.
technique "dif f erences" the measurement of the carrier beat phase across time, f requency, receivers, satellites,
or any combination of these. The most popular dif f erences are single, double and triple.
Differential GPS / GNSS (DGPS / DGNSS) is a positioning procedure that uses two receivers, a rover at an
unknown location and a ref erence station at a known, f ixed location. The ref erence station computes corrections
based on the actual and observed ranges to the satellites being tracked. The coordinates of the unknown
location can be computed with sub -meter level precision by applying these corrections to the satellite data
received by the rover.
Dilution of Precision (DOP) is a class of measures of the magnitude of error in GNSS position f ixes due to the
orientation of the GNSS satellites with respect to the GNSS receiver. There are several DOPs to measure
dif f erent components of the error. Note: this is a unit-less value. See also PDOP.
Doppler Aiding is a signal processing strategy that uses measured Doppler shif ts to help the receiver smoothly
track the GNSS signal, allowing more precise velocity and position measurement.
Doppler Shift is the apparent change in f requency of a received signal due to the rate of change of the distance
between the transmitter and receiver.
Double Difference between receivers and between satellites is f ound by dif f erencing the single dif f erence f or
one satellite with the single dif f erence f or another satellite where both single dif ferences are f rom the same
epoch.
Dual-Frequency is a type of GPS receiver that uses both L1 and L2 signals f rom GPS satellites. A dual -
f requency receiver can compute more precise position f ixes over longer distances and under more adverse
CNAV-MAN-061
Revision B
C-NavX1 GNSS Receiver User Manual
Figure 42: DTE to DCE RS-232 Pin Assignments
DOC-TEM-28-NUM Rev A Uncontrolled copy when printed
DCD
RD
TD
DTR
GND
DSR
RTS
CTS
07-00041-A
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