[amsat-bb] Fw: NO84 Telemetry Equations

[Robert Bruninga]

The first value is battery volts in hundredths.  The second is bus power in
mA.  The third and 4th are +Z and -Z temps using the equation-1.26E-6*X^3
+0.0028 X^2 -2.215X +625.  The last one is meaningless when the digi is ON.
When the digi is off, then the last one is battery temp -2.5E-6* X^3
+0.0061X^2 -5.149X^+1475.  In the 00011X00 value only the X has meaning.  It
is 0 if the digi is ON and it is 1 if the digi is OFF.

Bob, WB4APR

>I was wondering more about decoding the telemetry values in a line like
>this that can be received on the two meter downlink:
>
> 00:00:18:41 :
> PSAT]APRSON,ARISS,qAR,W7KKE:T#515,854,075,502,862,410,00011000
>
> In the original paper I found on the internet from 2007, the equations for
> decoding the values were "TBD". I assume that they have been determined
> and would like to get a copy of them.
>
> Steve AI9IN
>
>
> ----- Original Message -----
> From: "Stewart Todd Morgan" <morgan_st at bellsouth.net>
> To: <skristof at etczone.com>
> Sent: Tuesday, July 07, 2015 8:46 PM
> Subject: NO84 Telemetry
>
>
>> The best places to find your answers are probably the following:
>>
>> http://www.urel.feec.vutbr.cz/esl/   (Links for both BRICsat and PSAT
>> (NO84) on the right side of the page)
>> http://aprs.org/psat.html  (for APRS telemetry decode)
>>
>> The first link has decoding information for PSK31 telemetry for both NO83
>> and NO84.
>>
>> 73
>>
>>
>> Todd
>> AL0I
>>
> Steve Kristoff
> skristof at etczone.com
>
> “A few chords strummed on a ukulele, enough to please a few others beside
> yourself, does more good in this world than the combined efforts of all
> the financiers and politicians that ever lived.” – Frank Littig, Littig’s
> New Harmony Self Instructor Chords for Ukulele, Banjuke or Taro Patch
> Fiddle, Chart Music Publishing House, Chicago, Illinois, 1924
Steve Kristoff
skristof at etczone.com

“A few chords strummed on a ukulele, enough to please a few others beside
yourself, does more good in this world than the combined efforts of all the
financiers and politicians that ever lived.” – Frank Littig, Littig’s New
Harmony Self Instructor Chords for Ukulele, Banjuke or Taro Patch Fiddle,
Chart Music Publishing House, Chicago, Illinois, 1924

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