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102 SMART-MR10/15 User Manual Rev 5
B.10 PDPFILTER Enable, disable or reset the PDP filter
This command enables, disables or resets the Pseudorange/Delta-Phase (PDP) filter. The main
advantages of the Pseudorange/Delta-Phase (PDP) implementation are:
• Smooths a jumpy position
• Bridges outages in satellite coverage (the solution is degraded from normal but
there is at least a reasonable solution without gaps)
GL1DE Position Filter
GL1DE is a mode of the PDP
1
filter which optimizes the position for consistency over time rather
than absolute accuracy. GL1DE uses the GPS L1 and does not use GLONASS.This is ideally in clear
sky conditions where the user needs a tight, smooth, and consistent output. The GL1DE filter
functions autonomously, and with CDGPS or WAAS. The PDP filter is smoother than a least squares
fit but is still noisy in places. The GL1DE filter produces a very smooth solution with consistent rather
than absolute position accuracy. There should be less than 1 cm difference typically from epoch to
epoch. GL1DE also works in single point, DGPS and OmniSTAR VBS modes. See also the
PDPMODE command on page 103.
Abbreviated ASCII Syntax: Message ID: 424
PDPFILTER switch
Factory Default:
pdpfilter disable
ASCII Example:
pdpfilter enable
• Enable the PDP filter to output the PDP solution in BESTPOS, BESTVEL and
NMEA logs.
• Refer to the Operation chapter of the OEMV Installation and Operation Manual
for a section on configuring your receiver for PDP or GL1DE operation.
1. Refer also to our application note on Pseudorange/Delta-Phase (PDP) and GL1DEE Filters
(APN-038), available on our website at http://www.novatel.com/support/knowledge-and-
learning/published-papers-and-documents/application-notes/.
Field
Field
Type
ASCII
Value
Binary
Value
Description
Binary
Format
Binary
Bytes
Binary
Offset
1PDPFILTER
header
- - This field contains the command
name or the message header
depending on whether the
command is abbreviated ASCII,
ASCII or binary, respectively.
-H0
2 switch DISABLE 0 Enable/disable/reset the PDP filter.
A reset clears the filter memory so
that the pdp filter can start over.
Enum 4 H
ENABLE 1
RESET 2