[amsat-bb] Fw: NO84 Telemetry Equations

[skristof at etczone.com]

Thank you, sir. That's just what I was looking for. I think some of my
students could learn from downloading some satellite data and turning it
into real values using a little algebra. 

I appreciate your help. 

Steve AI9IN 

On 2015-07-08 08:34, Robert Bruninga wrote: 

> 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/ [1] (Links for both BRICsat and PSAT (NO84) on the right side of the page) http://aprs.org/psat.html [2] (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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Links:
------
[1] http://www.urel.feec.vutbr.cz/esl/
[2] http://aprs.org/psat.html
[3] http://www.amsat.org/mailman/listinfo/amsat-bb