User's Manual

42 SMART-MR10 User Manual Rev 0B
Chapter 3 Operation
3.4 GL1DE ®
SMART-MR10 contains NovAtel’s GL1DE ,a positioning algorithm for single frequency GPS and GPS/
GLONASS applications.
GL1DE produces a smooth position output tuned for applications where
optimal time relative (pass to pass) accuracy is more important than absolute accuracy, making it well
suited for agricultural applications.
Multipath signals tend to induce time-varying biases and increase the measurement noise on the L1
pseudorange measurements. Carrier phase measurements are much less susceptible to the effects of
multipath. The
GL1DE algorithm fuses the information from the L1 code and the L1 phase
measurements into a Position-Time-Velocity (PVT) solution.
GL1DE includes settings for a dynamic mode, a static mode, and an “auto” mode, where the filtering
parameters are automatically adjusted as vehicle velocity varies between stationary and dynamic
states.
Refer to the NovAtel white papers at www.novatel.ca/products/whitepapers.htm
for more information
on
GL1DE . Refer also to application note “APN-038 Pseudorange/Delta-Phase (PDP) and GL1DE
Filters” at www.novatel.com/support/applicationnotes.htm
.
3.5 ALIGN ®
3.5.1 ALIGN Heading Master and Remote Configurations
This section shows you how to set up a master station with an ALIGN-capable remote receiver for
applications that require heading output. Refer to APN-048, available from our Web site for more
details on setting up a heading configuration.
Master:
interfacemode com2 none rtca off
fix position lat lon hgt (enter your own lat, lon, and hgt values)
or movingbasestation enable
log com2 rtcaobs2 ontime 1
log com2 rtcaref ontime 10
Remote:
interfacemode com2 rtca none off
log headinga onchanged (heading, baseline length, pitch and other data)
log gphdt onchanged (NMEA heading formatted log)
3.6 Emulated Radar (ER)
A typical radar sensor emits radio beams that bounce off the ground, and computes ground speed
based on the speed at which objects are passing in front of the sensor. The output of the sensor is a
digital pulse, the frequency of which is proportional to the vehicle’s ground speed. This is particularly
useful for applications such as spraying and planting. The SMART-MR10 eliminates the need for