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Re: SUNSAT(SO-35) Telemetry



Johann Lochner" <lochner@ing.sun.ac.za> wrote:

> This is followed by the current uptime,reset cause (pwrn: power on, 
> tcmd: telecommand, wdog: watchdog) and current onboard time.
>
> Telemetry data is identified by a T# header.  The message consists of
> 7 fields, numbered 0 through 6.  The fields contain the following
> data: buffer pointer (0 in the first example above), battery state of
> charge (99 %), battery voltage (13.9 V), battery current (59 - 128 =
> -69, indicating that the battery is a net source of 690 mA; this
> field wraps at the extremes), battery temperature (28 -C), top plate
> sun sensor reading (42, an uncalibrated 8 bit value).  The last field
> indicates the state of the 8 solar panel strings (0: sourcing the
> power bus, 1: shunted, dumping energy).

Thank you for your detail above explanations.

For the telemetry what I caputured at 23:00-23:14UTC, 27 May 2000,

: OBC1v6: up=3/15:05:5, rst=pwrn, Sat May 27 23:11:15 UTC 2000
: fm SUNSAT-3 to APRS ctl UI pid F0
: T#010,097,133,191,033,028,11111111

Do the next decoding are correct ?

  Uptime                  : 3_days + 15_hours + 05_minutes + 05_seconds
  Reset cause             : power on
  Current onboard time    : Sat May 27 23:11:15 UTC 2000
  Entry buffer number     : 10
  Battery state of charge : 97 %
  Battery voltage         : 13.3 V
  Battery courrent        : 191 - 2^7 = 191 - 128 = 63 = 630 mA
  Battery temperature     : 33 C
  Top plate sun sensor    : 28 (an uncalibrated 8 bit value)
  State of 8 solor panel  : shunted all dumping energy

----------------------------------------------
Name : JE9PEL/Mineo Wakita, Member of JAMSAT
Mail : je9pel@jamsat.or.jp
URL  : http://www.ne.jp/asahi/hamradio/je9pel/
QTH  : Yokohama Japan, GL:PM95TJ
Date : May 31, 2000
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