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RE: Main Current in SEDSAT



Mineo, SEDSAT-telem team,

	It would be very beneficial to see main power (main current *
main voltage)
in a plot.  Since we are using DC/DC converters on the satellite, the
main voltage determines
the main current to a degree ( as well as the power consumption of the
satellite).

The efficiency of the DC/DC converters will be somewhat consistent
around the battery
voltages of 19-21V, and the power consumption (the efficiency changes
but is negligible).
I'd be very interested to see a long history of main power vs time.
Radiation effects on the
electronics should show a slow power trend.  Thanks!

-Robert

=-=-=-=-=-=-=-=-=-=-=-=-=-=
Robert A. Hillman
Sr. Digital Designer
Space Electronics Inc.
Voice: 	(619) 452-4167
Fax#: 	(619) 452-5499
Cellular: 	(619) 807-2656


> -----Original Message-----
> From:	Mineo Wakita [SMTP:JE9PEL@jamsat.or.jp]
> Sent:	Saturday, November 28, 1998 8:19 AM
> To:	telemetry@SEDS.LPL.Arizona.EDU
> Cc:	amsat-bb@amsat.org
> Subject:	Main Current in SEDSAT
> 
> 
> ------------------------------------------------------
> Variations of Main Current in SEDSAT (Nov.23-28, 1998)
> ------------------------------------------------------
> 
> 
> mA.670  680  690  700  710  720  730  740  750  760  770  780  790
> 800  810
> UTC
> +----+----+----+----+----+----+----+----+----+----+----+----+----+----
> +
> 3:40[Nov.23]                                              (787)*
> 3:41                                                        (792)*
> 3:42                                                        (792)*
> 3:43
> (802)*
> 3:44                                                            (800)*
> 3:45                                                        (792)*
> 3:46                                                  (778)*
> 5:19
> (802)*
> 5:21
> (802)*
> 5:22                                                            (800)*
> 5:23
> (806)*
> 5:24                                                   (782)*
> 5:26                                                            (797)*
> 5:29                                                   (782)*
> 5:31
> (808)*
> 5:32
> (802)*
> 7:07
> (808)*
> 7:08
> (806)*
> 7:09
> (821)*
> 7:10
> (811)*
> 7:11
> (817)*
> 7:12
> (811)*
> 7:13
> (808)*
> 7:15
> (811)*
> 7:16
> (819)*
> 7:17
> (808)*
> 7:18
> (806)*
> 7:19                                                            (800)*
> 3:12[Nov.24]      *(698)
> 3:13 *(672)
> 3:14              *(698)
> 3:15*(667)
> 3:18              *(698)
> 6:47                     *(712)
> 6:49                *(702)
> 0:33[Nov.26]                               *(747)
> 0:34                                   *(741)
> 2:14                                      *(744)
> 2:15                                       *(747)
> 4:00                                      *(744)
> 4:03                                 *(736)
> 4:04                                   *(741)
> 4:05                                   *(739)
> 4:08                                   *(741)
> 4:09                                   *(741)
> 4:11                                         *(752)
> 4:15                                      *(744)
> 0:06[Nov.27]                 *(720)
> 0:07                        *(717)
> 0:08                          *(722)
> 1:46                         *(720)
> 1:47                         *(720)
> 1:49                            *(726)
> 1:50                          *(722)  
> 1:52                         *(720)
> 1:53                     *(712)
> 1:54                          *(722)
> 1:55                          *(722)
> 1:57                       *(715)
> 1:58                         *(720)
> 1:59                       *(715)
> 3:39                          *(722)
> 5:20                             *(728)
> 5:21                            *(726)
> 5:26                             *(728)
> 7:08                                *(733)
> 7:09                            *(726)
> 7:11                              *(730)
> 7:12                                 *(736)
> 7:13                              *(730)
> 7:14                             *(728)
> 7:15                                *(733)
> 7:16                              *(730)
> 7:17                             *(728)
> 7:18                             *(728)
> 7:19                             *(728)
> 7:20                                *(733)
> 7:21                             *(728)
> 1:21      *(683)
> 1:24[Nov.28] *(687)
> 1:27         *(687)
> 1:28*(661)
> 1:29          *(691)
> 1:31          *(691)
> 1:32           *(693)
> UTC
> +----+----+----+----+----+----+----+----+----+----+----+----+----+----
> +
> mA.670  680  690  700  710  720  730  740  750  760  770  780  790
> 800  810
> 
> 
> ----------------------------------------------
> Name : JE9PEL/Mineo Wakita
> Mail : JE9PEL@jamsat.or.jp
> URL  : http://www.ne.jp/asahi/hamradio/je9pel/
> QTH  : Yokohama Japan,  GL:PM95TJ
> Date : 29-Nov.1998
> ----------------------------------------------
> 

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