[Ground-station] LoRa on our GEO sat ?

[Doug Phelps]

Morse Code via LoRa has been implemented on an IoT Transceiver.

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-------- Original Message --------
On Oct 14, 2019, 11:57 AM, Howie DeFelice via Ground-Station wrote:

> 100mW would be adequate from LEO. $50sat was only 100mW and we could hear it and command it on UHF with an omni QFH using FSK. We could operate under Part 97 and overcome the EIRP limitations for HEO. LoRa is great for low speed messaging, telemetry and command and control. I don't know how suitable it would be for real time conversations, but at the speed I type at it may be fine 🙂
>
> Howie AB2S
> ---------------------------------------------------------------
>
> From: Ground-Station <ground-station-bounces at lists.openresearch.institute> on behalf of Tom Clark via Ground-Station <ground-station at lists.openresearch.institute>
> Sent: Monday, October 14, 2019 1:06 AM
> To: Mark Whittington <markwhi at gmail.com>; Michelle Thompson <mountain.michelle at gmail.com>
> Cc: Ground Station <ground-station at lists.openresearch.institute>
> Subject: Re: [Ground-station] LoRa on our GEO sat ?
>
> On 10/13/2019 6:56 PM, Mark Whittington via Ground-Station wrote:
>> Might also be worth keeping in mind that there are LoRa modules that
>> operate in US amateur 70cm space.  The 433MHz modules are for the
>> European equivalent of the US Part 15 market but I'd assume we could
>> use them as long as we're identifying properly.
>>
>> 73
>> KA8I
>>
> Amateur Satellite 70 cm freq band is 435-438 MHz (world wide). LoRa,
> wireless keys, toys, etc that use 70 cm are at 433 MHz, outside of the
> satellite band.
>
> LoRA transmitter power is limited (I believe the spec is under 100 mW =
> +20 dBm). Please do the link budget calculation for LEO, and certainly
> for GEO, and you will find that the received signal 📶 will be woefully
> inadequate.
>
> 73 de Tom, K3IO
>
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