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Re: SuitSat Mission Time Puzzle



Hello all
by reverse engineering the data on
http://www.aj3u.com/blog/ web page, I was
able to fill in some of the missing values.
What i noticed a few days after we had Telemetary, is
there is a slippage in the data.
I needed more logs to see if there was an pattern or
just calculations errors.
If we assume that some of the "Date Recieved" times
are off a few minutes, then that could
explaine some of the drifing.  However, I do see two
different patterns in the time.
Can you see it.



Date            Mission Temp C	Temp F	Battery	Hours	 
Days    Calculated 	Diff	
Recieved        Time                                  
           Date
2/8/2006 13:49	6670	12	53.6	26.7	111.1667  4.6319 
2/8/06 14:15	 0.0175810185	lead 21
2/9/2006 12:37	7967	12	53.6	26.7	132.7833  5.5326 
2/9/06 11:52	-0.0315856482	lag 47
2/10/2006 6:39	9044	13	55.4	26.7	150.7333  6.2806 
2/10/06 5:49	-0.0350578704	lag 50
2/11/2006 7:04	10501	13	55.4	26.7	175.0167  7.2924 
2/11/06 6:06	-0.0402777778	lag 58
2/11/2006 11:50	10786	13	55.4	26.7	179.7667  7.4903 
2/11/06 10:51	-0.0409722222	lag 61
2/12/2006 5:52	11862	14	57.2	26.7	197.7000  8.2375 
2/12/06 4:47	-0.0451388889	lag 65
2/13/2006 4:39	13222	14	57.2	26.6	220.3667  9.1819 
2/13/06 3:27	-0.0506597222	lag 72
2/13/2006 6:18	13320	14	57.2	26.6	222.0000  9.2500 
2/13/06 5:05	-0.0509027778	lag 73
2/14/2006 5:05	14680	15	59.0	26.6	244.6667  10.1944
2/14/06 3:45	-0.0558333333	lag 80


Assumed Start date and time of mission.
2/3/06 6:05 PM
38751.75347


--- "A.J. Farmer (AJ3U)" <farmer.aj@gmail.com> wrote:

> Over the past few days, I have received a couple of
> e-mails with
> telemetry analysis from Barry Kort (non-Ham). He has
> been following
> along with SuitSat's progress via my website and
> after analyzing some
> of the telemetry, he noticed something peculiar
> about SuitSat's
> reported mission time. I shared this with Steve
> Bible, N7HPR who
> designed and built the controller for SuitSat. 
> Steve has confirmed to
> me that he also noticed this peculiarity and said,
> "I noticed this
> this weekend but left it up for others to discover."
> 
> In keeping with this spirit, and to provide a bit of
> a challenge for
> everyone, I have decided not to reveal what has been
> noticed by Barry
> but instead make this into a puzzle. All of the data
> that you need to
> solve this puzzle is posted on my website at
> http://www.aj3u.com/blog
> in the form of telemetry reports. If you figure it
> out, good for you,
> but try to resist the temptation to post it so that
> everyone can get a
> fair shot at this.  I'll be posting more hints on
> the website every
> day or so.
> 
> --
> A.J. Farmer, AJ3U
> http://www.aj3u.com
> ----
> Via the sarex mailing list at AMSAT.ORG courtesy of
> AMSAT-NA.
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