![]() ![]() Is this high altitude balloon an up to 30km, burst, and down to Earth job or a round the World floater ? In most places in the World, your limited in the license excempt bands to 10dBm 434Mhz and 14dBm 868Mhz (common TTN band). They also use a LoRa bandwidth of 20800hz to avoid legal duty cycle issues. ![]() The UKHAS guys do transmit pictures from HABs, and for very good reasons they use SSDV whereby the image is split into blocks, loss of a block does not result in total image loss. The load such a transmission from a high altitude balloon would put on the TTN system could be huge with the signals being processed by many gateways over a wide area.Īlso remember that LoRaWAN\TTN is really designed as a one way system, there is no general acknowledgement of packet reception which you would need for a video image transmission to be successful, a single corrupt bit can mean no image at all. TTN has community airtime limitations, which would make this hard.Įven at the fastest datarate, SF7 BW125000, you free access limit is circa 12kbytes of useful data a day. The thing is I'm playing with the idea to send the pictures through LoRaWAN, not just from point-to-point LoRa.
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