The Base Station is showing how well your aircraft is seen from the ground
The RX says, how well you are seen from other aircraft, this can only be measured from users with PAW + iGRID
The caveat here is that for an A/C Receive there are 2 RF devices to consider
- Quality of your installation
- Quality of their installation
so you could have the best installation in the world, and this would be shown from a ground view perspective
But for any captured data by another airborne receiver that would depend upon the quality of their installation, for instance, thrown in the luggage compartment - not great, external antenna with ground plane - much better