recieve L-band corrections and broadcast via IP + receive via IP and apply PointPerfect corrections on 2nd unit

[edgecase14]

Subject of the issue

This would be a new feature to support the following use case: Frequently arborists wish to inventory trees with high accuracty location
This presents a problem when using PointPerfect corrections, when neither L-band or cellular data for IP based corrections is available.
One solution would be to place an L-band antenna where reception is possible, and then relay the SPARTN messages via WiFI or 900MHz telemetry radio to a ZED-F9P based receiver operating under heavy tree canopy.

Your workbench

• What version of RTK firmware are you running? v3.2
• What radios are you using: Bluetooth, WiFi and/or 900MHz telemetry radio
• What app are you using to connect over Bluetooth? QFIELD
• Are you transmitting NTRIP back to the device? This would be similar to NTRIP
• Are there any additional details that may help us help you?
  Both TOP106 type l-band antenna in an area with a clear view of sky, or a parabolic dish or helix antenna under tree canopy are being considered. The L-band receiver would be mounted on a tripod and aimed at the Inmarsat, while backpack worn ESP32/ZED-F9P based "rovers" (typically 1-2 units) are used .

Steps to reproduce

Field testing has shown that L-band signal will drop out much sooner than WAAS or Autonomous GNSS service, under tree canopy, especially when canopy is south of the rover.

Expected behavior

Ideally L-band corrections should continue to function as long as GNSS signals are useable.

Actual behavior

Rover switches to WAAS (DGPS) and continues to function well, long after L-band has dropped out.

[nseidle]

Ideally L-band corrections should continue to function as long as GNSS signals are useable.

Thanks for reporting and proposing a solution. I get the impression from your title that you want PointPerfect corrections over WiFi, but then the content of the issue says you want PP over radio. Which is it?

I think allowing an L-Band Facet (I know you're on custom hardware) to access its PP corrections using WiFi is a fine idea. The use case would be a user with cellular coverage, but no or poor L-Band reception, could continue RTK if GNSS was good enough.

One solution would be to place an L-band antenna where reception is possible, and then relay the SPARTN messages via WiFI or 900MHz telemetry radio to a ZED-F9P based receiver operating under heavy tree canopy.

Please note this is already possible using a base is assisted mode. Basically, an L-Band unit surveys in but with really accurate position. That base then starts transmitting RTCM. If you hook a radio to the RADIO port, it will transmit to a rover Facet and you'll have, effectively, a L-Band based relay.

[nseidle]

Closing due to inactivity. Please see issue #497 for a discussion of PointPerfect over WiFi (or other) on non L-Band devices.