Pixhawk, How Many GPS satellites is enough for safe launch

[Paul-H]

Hi all

As subject, When Using a Pixhawk how many GPS Satellites are needed for a safe launch.

And is it possible within Mission Planner to set that number so it will not Arm until it has the correct number of Sats locked in.

Thanks

Paul

[Paul01]

I would take notice of the HDOP over how many satellite you have, I would always recommend a HDOP of 1.8m or less, to be on the safe side.

[Revs]

Yeah I think the general consensus is a HDOP of 2.0 max.

[hoverfly]

The recommended is 5 SATs and hdop 3. !!
Personally as above  1.8 is good , another point is check the k-index
as it can really ruin your day.  My apm';s are set to 6 SATs and hdop2.
So far no problems.(famous last words)

[Paul-H]

Thanks for the replies

Is there a way in mission planner to set those values so the board will not arm until those figures have been met.

Thanks

Paul

[hoverfly]

In mission planner open full paramiter list (button  at top of screen  with a spanner) in config/tuning, type gps in find box ,this opens window in which you will see AHRS-GPS-MINSATS. Set this to 6.

[Paul-H]

Thanks