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Re: AO-40
- Subject: [amsat-bb] Re: AO-40
- From: "Steve kb9ups" <kb9ups@xxxxxxxxxx>
- Date: Wed, 7 Dec 2005 08:08:46 -0500 (EST)
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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