[amsat-bb] Re: beep box help
Mark L. Hammond
marklhammond at gmail.com
Wed Sep 26 11:18:34 PDT 2012
Looks to me like the program will decode the packets right on the
Packets copied, decoded. Then, there's always the documentation on
the web. Isn't this what you say isn't there?
What is so secret?
F-1’s AX.25 packet format
Beacon Data format:
Date: dd/mm/y: 5/4/3=12 bits
Time: hh/mm/ss: 5/6/6=17 bits
Battery voltage multiplied by 100, divide by 100 to get actual value
Solar cells voltage
Solar cells voltage multiplied by 10, divide by 10 to get actual value
oC (side 1)
oC (side 2)
oC (side 3)
oC (side 4)
oC (side 5)
oC (side 6)
oC (inside solar cell)
112 bits = 14 bytes
- Temperature reading from sensors, will be added with 100 before
transmission to ensure a positive number so please subtract 100 to get
- 112 bits, divide to 14 chunks of 8bits, each chunk becomes one byte
- years beginning from 2012, current year = 2012 -> Y = 0
On Wed, Sep 26, 2012 at 1:44 PM, Gordon JC Pearce <gordonjcp at gjcp.net> wrote:
> On 26/09/12 11:40, Stefan Wagener wrote:
>> What you do with the data is totally up to you. Many of us help these
>> and forward telemetry information to them. Some teams have developed
>> special software to decode the data and allow us to actively monitor the
>> status of the satellite and any experiments.
> I'd love to get involved in that, and indeed I think a lot of the current
> thread was spawned by a discussion of tracking the F-1 sat. Unfortunately,
> there is only a Windows binary available of this software. I know amateur
> radio is a technical hobby, but I haven't the inclination to be a computer
> nerd as well, and I haven't the time, inclination or money to buy another
> computer and a copy of Windows and all the expensive training courses.
> I do wonder if having the telemetry in an unpublished format counts as using
> a "secret code"?
> Gordon JC Pearce MM0YEQ
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Mark L. Hammond [N8MH]
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