@Evan-D ,
VOXL m500 uses VOXL1 computing board, which comes with a wifi module on board. The wifi module can be configured in SoftAP mode (access point) or station mode.
If the ground sensors have wifi access points, then once m500 gets close to the access points, it can connect to those access points.
Alternatively, m500 could be an access point and once it is within range of the ground sensor, the ground sensor could detect m500 wifi SSID and connect to it.