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Re: AO-40



Is it conseveable to point another bird at AO-40 and get a picture of it? Maybe then some answers would be known.


Steve/kb9ups
www.qsl.net/kb9ups

 --- On Tue 12/06, John Mock < kd6pag@qsl.net > wrote:
From: John Mock [mailto: kd6pag@qsl.net]
To: amsat-bb@amsat.org
Date: Tue, 06 Dec 2005 19:19:16 -0800
Subject: [amsat-bb] Re: AO-40

I've always wondered if the changes in noise level in response to commands<br>to AO-40 was repeatable or not.  Please note, though, at this point, we have<br>no idea what attitude AO-40 is in (e.g. where its antennas are pointing).<br><br>However, occasionally, perigee is close to the 'States (or other control<br>station) and that might be a good time to do things like check for changes<br>in noise level.  For example, we have a LEO-type pass over Orlando where<br>AO-40 is less than 3000 km away (see below).  However, maybe it's just<br>the nature of KEPS, but i only see sub-3000 km passes through the beginning<br>of February.<br><br>> If I recall, the system voltage did not immediately drop to zero, but <br>> degraded over a period of minutes.  So it is unlikely that the delta-MM <br>> energy came from the battery.<br><br>My recollection from looking at the telemetry was that the main battery<br>voltage went through more than one period of instability, the last of<br>which 
was severe enought to leave AO-40 in an inaccessible state.  I think<br>i have a full set of AO-40 telemetry, and CGI's to view it on-line (albeit<br>at the moment, not all of that data is accessible via the net).  If anyone<br>want to look at this, please contact me and i can make sure this data is<br>on-line (at least when needed).  [Those interested might also want to look<br>at: http://www/qsl.net/kd6pag/AO-40/PowerAnomoly.html]<br><br>Myself, i'd rather see energy put into getting Eagle and P3E launched.  But<br>if someone thinks they have an idea that might revive AO-40, it might be<br>worth looking at it.<br><br>		         -- KD6PAG  (Networking Old-Timer, Satellite QRPer)<br><br><br>[Note: I never send unsolicited binary attachments and if you receive anything<br>purportedly from <kd6pag@qsl.net> that isn't signed with my callsign, then it<br>probably isn't from me.]<br><br>-------------------------------------------------------------------------------<br>Satellite 
#26609  : AO-40<br>Data File         : tlex.dat<br>Element Set Number: 627 (Orbit 2309)<br>Element Set Epoch : 09Nov05  20:00:18.723 UTC   (26.9 days ago)<br>Orbit Geometry    : 1180.52 km x 58653.74 km at 7.469 deg<br>Propagation Model : TLE Mean<br>Ground Station    : Orlando, FL, USA   ---   EL98HN<br>Time Zone         : UTC (+0.00 h)<br>Downlink Frequency: 146.0000 MHz<br><br><br>Tue  10Jan06  ---  Orbit 2388<br><br>   UTC    Azimuth  Elev    Range  Sun Ang  Doppler  Loss  Phs Md V<br>           [deg]  [deg]     [km]    [deg]   [kHz]   [dB]<br><br>23:10:41   247.4    0.3   5753.7    174.3   +3.36  150.9  254    D<br>23:11:41   244.6    1.7   5342.5    171.9   +3.31  150.3  254    D<br>23:12:41   241.3    3.1   4938.7    168.6   +3.24  149.6  254    D<br>23:13:41   237.4    4.7   4546.7    164.6   +3.12  148.9  254    V<br>23:14:41   232.8    6.3   4172.1    159.8   +2.95  148.1  255    V<br>23:15:41   227.2    8.0   3822.8    154.1   +2.71  147.4  255    V<br>23:16:41   
220.5    9.7   3508.8    147.4   +2.37  146.6  255    V<br>23:17:41   212.4   11.3   3243.0    139.4   +1.92  146.0  255    V<br>23:18:41   203.1   12.5   3040.3    130.3   +1.35  145.4  255    V<br>23:19:41   192.5   13.2   2915.6    120.2   +0.66  145.0  256    V<br>23:20:41   181.4   13.1   2880.3    109.5   -0.09  144.9  256    V<br>23:21:41   170.4   12.2   2938.3     99.0   -0.84  145.1    0    V<br>23:22:41   160.2   10.7   3084.2     89.2   -1.51  145.5    0    V<br>23:23:41   151.2    8.8   3305.7     80.6   -2.06  146.1    1    V<br>23:24:41   143.6    6.7   3587.6     73.2   -2.49  146.8    1    V<br>23:25:41   137.3    4.7   3915.5     67.1   -2.81  147.6    1    V<br>23:26:41   132.0    2.7   4277.0     62.1   -3.04  148.4    1    V<br>23:27:41   127.6    0.9   4662.5     58.0   -3.20  149.1    1    V<br>===============================================================================<br>----<br>Sent via amsat-bb@amsat.org. Opinions expressed are those of the 
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