How many satellites at least in CMM Micro or CMM II ?

When I use CMM Micro to test, I found when I track only one satellite,the AP can work normaly. not four satellites.

So I want to know how many satellites at least in CMM Micro or CMM II ?

I don’t know the specifics about the software loaded on the CMM but it uses a Motorola GPS that has typicaly has a timing mode. With the timing mode, once the unit has a fix it can work with just one sat but it needs at least 4 to calibrate. One problem is that if something near your canopy radios is blocking the GPS signals, you may end up with multi-path issues with your canopy radios. If you have multi-path issues with the GPS singal, then it will do more harm than good so you may need to find a better view of the sky.