Javad GNSS DELTA Series - Multi-Purpose GNSS Receiver

JAVAD Support

JAVAD Support

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5PLS
JAVAD GNSS
The DELTA is a mountable, rugged GNSS enclosure, available with single or dual antennas, MEMS IMU, and standard interfaces.
DELTA is designed for any application that uses RTK, Heading, Roll, & Pitch.

Key Features
• 874 Channels
• All GNSS Constellations
• Ethernet, USB, Serial
• IRIG Serial Time Codes
• 64GB Memory
• 1PPS, Event

Built on the custom ASIC engineered by JAVAD, DELTA tracks all GNSS constellations with patented anti-jamming, anti-spoofing, and multipath reduction technologies for reliability and signal quality when supplied with TRE-3S.

Use the simple web interface to configure as a Reference Station, either fixed and permanent or Field Portable Base Station, with integrated NTRIP Caster and Server functions to transmit RTCM corrections.
 
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Sdrake14

Sdrake14

Active Member
Okay will post here, Seems to be no JLink category. I recently purchased a Delta S3S receiver and GrAnt to set up a CORS base for my company survey team. Along with it a JLink Radio. The intent was to use port forward method to broadcast corrections via internet, which method I have used since 2015 at multiple locations, and configurations, simple enough. The JLink was to be a repeater, via UHF, for the TCP data stream into remote locations where no cell signal reached.

Upon getting the equipment, less connections needed by oversight of the sales team, I was thwarted in my setup by an I.T. contractor who is resisting the idea of adding port forwarding to the company network, for security anxiety reasons. Long to short, after much debate he is open to using NTRIP caster in place of TCP, thus a $1k upgrade yet to get. I had already invested time, energy, and stuf to install the antenna in a great location ready to go. Dead on arrival.
So I brainstormed I will just use the Jlink, short term, until resolved, to broadcast Delta 3 corrections.

The Jlink manual describes such a setup for broadcasting corrections using wifi from a Triumph 2 into the Jlink modem, and cellular out to internet. Viola, I set up a static sims in the Jlink, and followed the manual to set the Delta 3 to work that way. No luck. I then followed the steps using a Triumph 2 receiver with the Jlink, Success! So return to the Delta and follow same exact setup steps, no go again! GRRRRR. So it appears from the Jlink setup software that the TCP data stream is getting out to the TCPO port and that is connected to a receiver, but no GNSS signals are passing through from the Delta3 to the Jlink. The staus page shows "no valid GNSS data". The Rover shows recieving all things normal, but no corrections. With the T2 I was getting corrections and fix, and the Staus page showed GNSS corrections present. Everything configured the same.

Does anybody out there have any idea why this disconnect in GNSS data between Delta S3S and Jlink might exist?
 
Sdrake14

Sdrake14

Active Member
Okay. So if I were to have a LAN adapter plug that would fix it, the JLink has a LAN plug adapter.....
 
JAVAD Support

JAVAD Support

Active Member
Staff member
5PLS
JAVAD GNSS
Sdrake14 said:
Okay. So if I were to have a LAN adapter plug that would fix it, the JLink has a LAN plug adapter.....
Click to expand...
For your long-term permanent base station, would it not be best to pursue a network 'Port Forwarding' solution using your 'base' TCPO or NTRIP-Caster capability to the Internet ?
Thus leave your JLINK unit to be able to be used to receive RTCM3.2 corrections from the Internet and relay via UHF or BT to your 'rover' units (in the field) ? ? ?
 
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Sdrake14

Sdrake14

Active Member
John Rosco said:
The Delta-3S does not have Wi-Fi capability (like a T2 or T3NR has), therefore cannot be used with a JLINK LTE being used as a 'hotspot device (see 'port forwarding information').
Click to expand...
I do not think you are correct John. There is a "wifi" antenna connect plug on the Delta 3 and when I go through setup it connects to the Jlink in the manner of the
T2 and there is a TCP stream showing on the Jlink from the Delta...

just no GNSS data . . .
1778519806327.png
 
Sdrake14

Sdrake14

Active Member
JAVAD Support said:
For your long-term permanent base station, would it not be best to pursue a network 'Port Forwarding' solution using your 'base' TCPO or NTRIP-Caster capability to the Internet ?
Thus leave your JLINK unit to be able to be used to receive RTCM3.2 corrections from the Internet and relay via UHF or BT to your 'rover' units (in the field) ? ? ?
Click to expand...
Long term was originally intended to be TCPO. Company I.T. put a cancel on that.
We will shift to an NTRIP solution as soon as I have all firmware/hardware in place.
And configuration setup.
1778698157723.png

Then the Jlink will service as a feild repeater, it's original intent.

In the immediate interim I would like to use the Jlink to broadcast the RTCM3.2 corrections, as it should, until the other setup is in place. I have crews in need of this solution from a business standpoint.
 
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JAVAD Support

JAVAD Support

Active Member
Staff member
5PLS
JAVAD GNSS
Sdrake14 said:
Does anybody out there have any idea why this disconnect in GNSS data between Delta S3S and Jlink might exist?
Click to expand...
The Delta-3SW 'base' was set to send TCPO corrections every 0.2 second period :(
The 'base' RTCM3.2 MSM GPS+GLN+GAL+BDS corrections require 300 to 500 mSecs to transfer 'all 'of the base RTCM3.2 correction data to the 'rover' . . .
No Base Data.jpeg

Reconfiguring 'the base' to send TCPO RTCM3.2 MSM GPS+GLN+GAL+BDS correction period to 1-second (1000 mSec) , resolved the data RTCM correction transmission / transfer problem :)
Valid Base Data.jpeg

See post / thread - No Update of Filter
 
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