AcuClock.vi

Elina Brobeck

This page documents the Labview source code that controls the interaction between the GPS antenna and the Front Panel VI.

The following image is panel of the AcuClock VI. (It is suppressed during execution of chicos.exe.) The AcuClock VI is responsible for setting the parameters on the GPS antenna and for continuously updating the timing information while chicos.exe is running.

The program executes the following sequence of steps:

  1. Variables are initialized.
  2. The type ID of GPS antenna is read.
  3. If ID is unknown, the program exits.
  4. T-RAIM algorithm enabled.
  5. T-RAIM alarm limit set to 1400ns.
  6. Pause, 50ms.
  7. Enable 1PPS.
  8. Pause, 50ms.
  9. Set Position/Status/Data message rate.
  10. Pause, 50ms.
  11. Set Atm. correction to Ionosphere Only.
  12. Set ouput to UTC format.
  13. Send coordinate data to the receiver.
  14. Continuously update timing corrections.

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