Newbie question regarding specific use-case scenario

I map wildlife observations (research) along roadways where I have intermittent view of the horizon, lots of trees and rugged terrain. At each observation, I need to be able to record a relatively accurate heading (azimuth) in both static and dynamic modes (i.e., start and stop), and using an NMEA compliant laser-rangefinder combined with the vehicle position, compute the offset location and store it in a file with additional labels.

I’m thinking a GNSS satellite compass with RS232 support for the rangefinder all connected to a tablet (Android?). I’ve thought about hacking my own system using commercially available maker boards for dual antenna GNSS capability, but I’m not that inclined or motivated. Any feedback or suggestions would be greatly appreciated.

So simply said you need a dual antenna GNSS receiver?

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