Re: [amsat-bb] Fw: NO84 Telemetry Equations
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@bellsouth.net To: skristof@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@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@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
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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@bellsouth.net To: skristof@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@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@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
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb [3] _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb [3]
Links: ------ [1] http://www.urel.feec.vutbr.cz/esl/ [2] http://aprs.org/psat.html [3] http://www.amsat.org/mailman/listinfo/amsat-bb
participants (2)
-
Robert Bruninga -
skristof＠etczone.com