LoRaWAN packet received at record distance of 702 km
So, this raises a question I've been meaning to ask for a while. Let's say you want to transmit a very small amount of information over a very long distance (say 80 bytes over a minimum distance of hundreds to thousands of kilometers.) What options are there that are relatively small-sized?Let's say maximum receiver size is roughly 10cm by 10cm, and power consumption can't be over 10 watts, but the "base station" can be as large and powerful as you want.[edit] cause this is getting some upvotes, here's some thinking I was doing: you can't go through the ground (unless you're at ultra low frequencies and those need antennas measured in tens of kilometers long). So you pretty much have to bounce stuff off the atmosphere, right? When you see stuff like this [0], with thousands of kilometers of range, I imagine that's what happening. Especially as that's 10MHz, which is 30 meters wavelength, which bounces off the atmosphere pretty well IIRC. The only thing with that is that the powers are incredibly low and the antennas are huge. What if you increased the power but decreased the antenna size, for example a 10cm x 10cm antenna with 10W? 100W? 1kW? Would transmissions across thousands of kilometers still be possible?