The Colorado Division of Fire Prevention and Control published a study on their evaluation of ATAK with goTennas, SPOT Trackers and tactical radios.
Here is the study, and here’s an excerpt from the report:
The Center of Excellence for Advanced Technology Aerial Firefighting (CoE) took advantage of the field test of satellite messengers to test an additional system that uses terrestrial radio communication to provide situational awareness. This system consisted of the goTenna, a data-transmitting radio compatible with mobile devices, and the Android Team Awareness Kit (ATAK) situational awareness app. The CoE previously tested the goTenna in a line-of-sight environment, but this was the first test we conducted with the device in areas with intervening foliage and terrain.