GPS Health [Rabbit Docs]

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====== GPS Health ======

The **GPS Health** page helps you spot the GPS devices that are having problems during the rally: devices that stop sending positions, have poor coverage or have stopped reporting.

To open it, on the [[en:mirally:rally:ultimas-posiciones|Last Positions]] screen click the button with the rally control links and choose **GPS Health**. Like the Check GPSs link, it can be shared with the organisation team without logging in to MiRally.

==== How it works ====

For each car number and each GPS, the system checks the positions received while the car is moving and counts the **gaps**: the moments when the GPS went more than X seconds without sending positions (10 seconds by default).

The table shows:

  * **Number** and **GPS Name**.
  * **Points**: number of positions received.
  * **Gaps >10s**: number of gaps.
  * **Longest Gap (s)**: the longest gap.
  * **Avg Sats**: average number of satellites. Few satellites mean poor coverage or a badly placed GPS.
  * **Last Problem**: time of the last gap.
  * **Status**, with colours:
    * Green: no gaps.
    * Orange: 1 to 3 gaps.
    * Red: more than 3 gaps.
    * Grey: no data in the time window.

==== Filters ====

  * **Time Window**: **Last X min** (the last 15 minutes by default), **Whole day so far** or **Custom range** (From / Until).
  * **Gaps >X s**: after how many seconds without positions a gap is counted.
  * **Speed**: only positions above this speed are taken into account (5 km/h by default), so that stopped cars are not counted as a problem.

Click **Update** to apply the filters.

<WRAP caution>
**Recommendations:**

  * Keep GPS Health open with the last 15 minutes window during the stages. If a GPS turns red, tell the competitor to check where they have placed it.
  * After each stage, check **Whole day so far** before publishing the results. A GPS with many gaps can explain a badly calculated PC in [[en:mirally:rally:tiempos-pcs|PC Times]].
</WRAP>