CSI Wireless DGPS MAX, Reference Manual

Page: 85 / 176

DGPS MAX Reference Manual
65
HDOP 1.3
This menu item displays the Horizontal Dilution
of Precision (HDOP), which describes the
quality of the satellite geometry. A lower value
is better than a higher number. An HDOP of
less than 1.0 indicates strong satellite geometry,
which promotes good positioning accuracy. A
value of over 3.0 indicates weaker satellite
geometry and accuracy may become affected.
This information is parsed from the
GPGGA
NMEA message.
Precision@
Accessing this menu by pressing the button
with this item in focus will provide access to
estimated real-time precision values of
computed positions. The contents of this
menu are described in Section 5.8.1.1.
NavCnd@ ABBABB
This menu item displays satellite tracking
information and is called the navigation
condition. Each character following the
NavCnd@
prompt is the number of satellites
that meet certain criteria. Each character space
is a hexadecimal value of between 0 and 12 (B
in hexadecimal).
by pressing the button with this item in
focus, an intuitive summary of the navigation
condition is displayed. This is discussed in
further detail in Section 5.8.1.2.