[amsat-bb] Re: beep box help
Mark L. Hammond
marklhammond at gmail.com
Wed Sep 26 14:58:22 PDT 2012
Very nice, Timothy! Thanks for making telem easy to decode and for sharing your links.
At 11:33 PM 9/26/2012 +0200, Timothy Stranex wrote:
>There are also telemetry decoders available for various satellites on
>the Carpcomm website. For example:
>Just click "Submit data", enter the morse characters or hex data frame
>that you've received, and it will be decoded and the latest telemetry
>values will be displayed on the page for everyone to see. We're
>continuously working on adding decoders for all the new satellites.
>On Wed, Sep 26, 2012 at 8:18 PM, Mark L. Hammond <marklhammond at gmail.com> wrote:
>> Looks to me like the program will decode the packets right on the
>> client software.
>> 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-1s AX.25 packet format
>> Beacon Data format:
>> Size (bit)
>> Date time
>> Date: dd/mm/y: 5/4/3=12 bits
>> Time: hh/mm/ss: 5/6/6=17 bits
>> Battery voltage
>> 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
>> Temperature 1
>> oC (side 1)
>> Temperature 2
>> oC (side 2)
>> Temperature 3
>> oC (side 3)
>> Temperature 4
>> oC (side 4)
>> Temperature 5
>> oC (side 5)
>> Temperature 6
>> oC (side 6)
>> Temperature 7
>> oC (inside solar cell)
>> Temperature 8
>> oC (onboard)
>> 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
>> actual value
>> - 112 bits, divide to 14 chunks of 8bits, each chunk becomes one byte
>> - years beginning from 2012, current year = 2012 -> Y = 0
>> Mark N8MH
>> 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]
>> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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