86
Oxford Technical Solutions
NMEA The NMEA outputs conform to the National Marine Electronics Association
Standard (NMEA 0183 version 3.01). The NMEA sentences available are
GPGGA, GPHDT, GPVTG, GPZDA, GPGST, PASHR, GPRMC, GPGSV,
GPGSA, PTCF, GPPPS, PRDID, GPROT, GPGGK, and GPUTC. The NMEA
0183 description manual gives details of the fields output in the NMEA
sentences.
Javad I+RTK A special set of messages output in GREIS format to be used with Javad
receivers. For assistance please contact OxTS for support.
MCOM Used for marine applications. Identical to NCOM output but with the addition of
heave measurements.
TSS1 TSS1 format outputting acceleration, heave, roll and pitch.
TSSHHRP TSSHHRP format.
EM3000 Suitable for use with Simrad EM3000 multibeam sounders.
EM1000 Suitable for use with Simrad EM1000 multibeam sounders.
If the NMEA packet type is selected, the NMEA tab will appear in the properties window
(see Figure 38). In this tab the NMEA messages to output on the serial port of the RT are
selected by choosing the data rate for each message type from the drop-down lists and
clicking the checkbox for when to generate the message.
NMEA messages can be generated on the falling or rising edge of the event input. Check
the falling or rising edge checkbox to instruct the RT to compute the sentence when the
event occurs. The RT can also output NMEA messages when the distance output has a
falling edge. The camera output replaces distance output when the distance output is set
to less than 1 ppm (contact support@oxts.com for information on how to do this). These
messages use interpolation to compute the values at the exact time of the event and may
be output on the serial port up to 30 ms late and out of order compared to the normal
messages. To enable these messages check the appropriate checkbox.
Note that it is easy to overload the serial port if there are too many events. The software
computes the number of characters that will be output each second and displays this at
the bottom of the window. A serial port data overflow warning message will appear if
the data rate is too high for the selected baud rate; to fix this it is necessary to lower the
data rate of the selected NMEA sentences or increase the baud rate.
Selecting Allow extended length messages enables certain extended NMEA sentences
to be output. Please see the NMEA 0183 Description manual for more details.
Selecting Output approximate values before initialisation forces output of the raw
GNSS measurements before the RT is initialised. Note that there will be a jump (from
the antenna to the inertial measurement unit) when initialisation occurs.
Ethernet output
Adjustment: click … button to open properties window.
To Next Page
Loading...
