Re: Transmissions on Balloons
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Bill Brown
Ah...thanks Leo, I forgot to mention RTTY. I used that a lot in the early days for telemetry before APRS came onto the scene. I also used an analog voice chip (any of the ISD series) which I could address various voice clips that I prerecorded into the device and used that to send down voice telemetry on FM. ARBONET flew a voice telemetry payload during a GPSL a few years ago. As I recall it said something like "Help I'm lost" when the GPS failed.
- Bill WB8ELK
-----Original Message----- From: Leo Bodnar leo@... [GPSL] To: GPSL@... List Sent: Wed, Dec 6, 2017 12:18 pm Subject: Re: [GPSL] Transmissions on Balloons Few more modes:
Majority of UK flights use[d] RTTY
Some UK flights have used THOR16
Many flights use LoRa modulation now
There were flights on the continent using voice FM transmissions. I had a B-class payload ready to go but it did not make it into the air, here is off-air test recording http://www.leobodnar.com/balloons/files/B-number-station.wav
Cheers
Leo
On 6 Dec 2017, at 17:22, wb8elk@... [GPSL] wrote:
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