4 ms·
A very active tropo scatter system still in use today is the SNOTEL network, which are snow level and precipitation sensors spread all throughout very remote an
by blantonl 5y ago
A very active tropo scatter system still in use today is the SNOTEL network, which are snow level and precipitation sensors spread all throughout very remote and mountainous terrain in the Western US and Canada.
They operate on 40.67 MHz are still actively in operation today.
https://www.wcc.nrcs.usda.gov/snow/ https://www.wcc.nrcs.usda.gov/snow/
- walrus01 5y agoI imagine the information needed for small integer data from a sensor of rainfall mm/hour and snow gauge, etc is a very low data rate... What channel widths and modulations are they using in the 40MHz bands?
- blantonl 5y agoSnotel is a 9 khz channel bandwidth, BPSK data at 4000 bits per second