[amsat-bb] Fw: NO84 Telemetry Equations (correction)

[Robert Bruninga]

The TBAT first term should be -2.57E-6 not -2.5E-6…  I crrected it below.



They are now on the web page.

Bob



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 -2.57E-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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