
Operation OEM6 Cards and Enclosures
Chapter 4
OEM6 Family Installation and Operation User Manual Rev 12
67
If receiving OmniSTAR HP, the fifth field of the LBANDSTAT log should be 00c2, as shown in the following
example:
LBANDSTAT COM1 0 81.0 FINESTEERING 1596 235136.000 00000000 d1c2 5968
<1557854678 48.98 1098.9 0.00
00c2
0000 153860 545 0 0000 0201 154019
68000000 00000000
Refer to the NovAtel application note
APN-051 Positioning Modes of Operation
for OmniSTAR specifics.
4.8
RTK ASSIST™
RTK ASSIST is a feature that enables centimetre-level accuracies to be maintained through extended RTK
correction outages. With RTK ASSIST, RTK-dependent operations can continue through RTK correction
outages as long as 20 minutes.
RTK ASSIST uses correction data provided by TerraStar. To obtain these corrections, an L-Band capable
receiver is required and L-Band tracking must be enabled using the
ASSIGNLBANBEAM
command.
RTK ASSIST also requires a subscription to the RTK ASSIST service. To obtain a subscription, contact your
local NovAtel sales representative or visit
www.novatel.com/products/terrastar-gnss-corrections
. The NovAtel
product serial number (PSN) is needed to obtain a subscription. The PSN is available from the
VERSION
log.
RTK ASSIST is available as soon as the rover receiver has at least one valid RTK solution and has received
the RTK ASSIST correction data. If an RTK correction outage occurs, then RTK ASSIST will maintain RTK
mode until the subscription-permitted RTK ASSIST duration is exceeded. A shorter, user-defined RTK
ASSIST time out can also be set using the
RTKASSISTTIMEOUT
command. Normal RTK operation will
seamlessly resume if RTK corrections are restored at any point while RTK ASSIST is operating.
RTK ASSIST will report the RTK solution type that was present before RTK corrections were lost, unless the
estimated solution standard deviation exceeds the threshold set by the
RTKINTEGERCRITERIA
command. If
this occurs, then integer RTK solutions will be downgraded to their float RTK equivalent.
RTK ASSIST is enabled by default, but can be disabled using the
RTKASSIST
command. To monitor the
status of RTK ASSIST, view the
RTKASSISTSTATUS
log.
Refer to the
OEM6 Family Firmware Reference Manual
(OM-20000129) for information about the commands
and logs referenced in this section.
RTK ASSIST typically provides 4 cm accuracy. However, if the RTK outage occurs during
the first 30 minutes of receiver operation, the position accuracy provided by RTK ASSIST
may be lower.