CRFS RFeye Nodes

[PACNWComms]

I was able to play around with the CRFS RFeye nodes recently. Usually, another division of the company handles this, but I was out with former military units I was once a member of.....seeing how this can detect FRS/GMRS/MURS and potential use for Unmanned Aerial Systems (UAS) detection (around airports in this case). 

Was fun putting GMRS radios into people's hands and having the system track their transmissions around an area. These were Motorola XPR6550 and XPR7550e handhelds.

Attached is what a typical node looks like. We had three set up so the system could triangulate position. 

I then sent a "curveball" by transmitting from Motorola DTR410 Frequency Hopping Spread Spectrum (FHSS) radios. I could sense them, get a rough bearing and distance, but could not "lock" onto them due to the frequency hopping aspect (902-928 MHz Industrial, Scientific, and Medical [ISM] band). 

Anyone else use this system or something else for finding location of radio transmissions (APRS is common and also useful)?

[Socalgmrs]

5 minutes ago, PACNWComms said:

Anyone else use this system or something else for finding location of radio transmissions

Hahaha . Sure do. I spend my sundays putting 1000s of these units up so I can track all the local gmrs traffic around the valley. I know when wrxr123 is getting gas, or when wwyr345 is taking his grand kids to get ice cream.  One day wrop567 said he was south bound when he was really north bound.  I don’t know if he is just getting older or he was lying to me.  It still haunts me wondering if he was lying to me.   I also found out that my son stopped for a snack one day and did not tell me.  I really would have loved a taco that day.  Tracking radio users is my favorite pointless waste of time thing to do.