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Positioning Application: How to use Pseudorange Ramp toolbar button for RAIM test?

Objective/Summary
  • With this article, you can see an example RAIM test using Pseudorange Ramp toolbar button and Septentrio PolarX5 receiver.
  • For more information on different way to apply PR ramp in scenario, please refer to article FAQ12538 to learn about PR Ramps
Environment/Versions
  • PosApp all versions (SimGEN, SimREPLAYplus, SimREPLAY)
Procedure
  • RAIM test example applying PR ramps by Pseudorange ramp button in a scenario with Septentrio PolaX5 receiver.
    •  Before applying PR ramp in a scenario, run a scenario with a receiver connected to the simulator until the receiver gets a position fix using signals from a minimum of 5 satellites with a satisfactory geometry.
    • In the PosAPP software
    1. click the Pseudorange Ramp toolbar button
    2. In the Pseudorange Ramps dialog, click New
           ​​
  1. Type in Tx ID (for example GPS 15)
  2. Type in Pseudorange change (for example 1300
  3. Ramp up time(for example 3 mins)
  4. Repeat steps 3 to 5 for each satellite you want to apply a Pseudoragne ramp to(for example GPS 22 and GPS 29)
         
  • In RxControl Software ( normally RAIM on)
  1. Use the menu View-Channel table
    1. You can see GPS15, 22,29 rejected in status.
               
  • If you want to see what happen to Receiver by applying PR Ramp without RAIM
    • In Rx Control Softare
    1. Use the menu Navigation-Receiver Operation-Postion
    2. In Integrity Tab, Turn off RAIM
               
  • In Posapp Software
  1. Run a scenario again.
  2. After a receiver get position fix
  3. Apply PR ramp following steps above
    1. You can see receiver moving far away from reference postion
             

Product : Position Apps,SimGEN,PosApp