"Fully understandable - imagine this - the payload is not some heavy DSLR for invading someones privacy, but something as large as 5Ah 3S LiPo but made from C4 or Semtex and on the way somewhere at speed and in full autonomous mode."
"Is all the options really needed?
For example with TR-G3, which is single freq receiver (no need to go higher, for other frequencies, you need special permission anyway) with 20Hz update rate (that should be enough) and with RTCM receive and…"
they are professional grade GPS receivers, with RTK features - most interesting about them is that they have programmable correlators, so they can basically support any new technology…"