Require MSM5 and MSM7 Signals

I am trying to find a solution for a client, below is the last email he sent me with the required data for his NTRIP intergration on a John Deere tractor.

For our base station here with our new ag receivers I was told we need newer messages than msm4.

I need 1077, 1087, 1097, and 1127, but also leave the current 1006, 1008, 1033 and 1230 In don’t take those out.

The msm 4 messages don’t contain the doppler string. I am told the new ag receivers need that. Msm5 and msm7 messages do I would like the msm7 strings see if that works.

Hi Jason,

Reach RS2+ can output the following RTCM3 messages:

  • 1006 ARP station coordinate
  • 1074 GPS MSM4
  • 1084 GLONASS MSM4
  • 1094 Galileo MSM4
  • 1124 BeiDou MSM4
  • 1230 GLONASS code-phase biases
  • 1004 GPS
  • 1008 Antenna descriptor and Serial Number
  • 1012 GLONASS
  • 1033 Receiver and antenna descriptors

A while ago we added legacy RTCM3 messages 1004, 1008, 1012 and 1033 for old third-party receivers, including for John Deere SF6000 receivers.

There are indeed no MSM5 and MSM7 messages. In most cases, MSM4 messages are enough for third-party receivers for RTK operation. Are MSM5 and MSM7 messages crucial for John Deere receivers?

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Jason,

I’ll also conduct research regarding this matter and write you back shortly.

Hi Jason,

MSM4 messages indeed don’t include Doppler.

Message type Description
MSM4 RTK uses, Pseudorange, PhaseRange, CNR (but No Doppler)
MSM5 RTK uses, Pseudorange, PhaseRange, Doppler, CNR
MSM6 RTK uses, Pseudorange, PhaseRange CNR, with high resolution
MSM7 RTK uses, Pseudorange, PhaseRange, Doppler, CNR, with high resolution

Reach RS2+ doesn’t output MSM7 messages by default, since they’re heavyweight. But I’ll note it as the feature request!

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