Quantity   Component name
1 × U-Blox NEO M8T or other varient GPS module I used the M8T which is more $$ and hard to find to explore GNSS-RO sensing for improving weather forecasts through data assimilation. Any of the U-blox modules are fine. If you are going to carry the mass, might as well make it dual purpose. https://www.u-blox.com/en/product/neolea-m8t-series
1 × Teensy 4.0 Micro Controller https://www.pjrc.com/store/teensy40.html