POS MV V5 Installation and Operation Guide
POS-GPS
Timing
Copyright © Applanix Corporation, 2017
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manipulated as a group. The most common is the byte, made up of eight bits and equivalent to one
alphanumeric character.
Bits are widely used as a measurement for transmission. Ten megabits (Mb) per second means that
ten million pulses are transmitted every second. Measurements for storage devices such as disks, files
and databases are given in bytes rather than bits.
Byte
The common unit of computer storage from micro to mainframe, the byte is made up of eight binary
digits (bits). A ninth bit may be used in the memory circuits as a parity bit for error checking. The term
was originally coined to mean the smallest addressable group of bits in a computer (has not always
been eight).
C/A
The coarse/acquisition or clear/acquisition code modulated onto the GNSS L1 signal. This code is a
sequence of 1023 pseudorandom binary bi-phase modulations on the GNSS carrier at a chipping rate
of 1.023 MHz, thus having a code repetition period of one millisecond. The code was selected to
provide good acquisition properties. Also known as the "civilian code".
Control Port
Accessed via the LAN connector, the Control Port is designed to receive and acknowledge setup and
control commands from MV-POSView Controller. The Control port is not a physical port. Rather, it is a
subset of the Ethernet Interface.
Data Port
Accessed via the LAN connector, the Data Port is designed to broadcast high rate navigation and raw
sensor data. The Data port is not a physical port. Rather, it is a subset of the Ethernet Interface.
DGNSS
Differential GNSS. A technique used to improve positioning or navigation accuracy by determining the
positioning error at a known location and subsequently incorporating a corrective factor (by real-time
transmission of corrections or by post-processing) into the position calculations of another receiver
operating in the same area and simultaneously tracking the same satellites.
Dilution of Precision
Dilution of Precision (DOP) is a dimensionless number that accounts for the purely geometric
contribution of the position of the satellites to the uncertainty in a position fix. Standard terms for the
GNSS application are: GDOP-Geometric Dilution of Precision (three position coordinates plus clock
offset in the solution); PDOP-Position Dilution of Precision (three coordinates); HDOP-Horizontal
Dilution of Precision (two horizontal coordinates); VDOP-Vertical Dilution of Precision (height only);
TDOP-Time Dilution of Precision (clock offset only); RDOP-Relative Dilution of Precision (normalized
to 60 seconds).
