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CX2SA > SATDIG 01.05.14 21:02l 812 Lines 23060 Bytes #999 (0) @ WW
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Sent: 140501/1902Z @:CX2SA.SAL.URY.SA #:5673 [Salto] FBB7.00e $:AMSATBB9155
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. AO-73 over UK (Peter Wilson)
2. Re: AO-73 over UK (Paul Stoetzer)
3. May 3rd SATCOM at Chesapeake Deep Creek Library (Rich/wa4bue)
4. Antenna Question (Douglas Phelps)
5. Rotor interface (Elizabeth McDonnell)
6. LituanicaSAT-1 (PY5LF)
7. Re: LituanicaSAT-1 (Mike Rupprecht)
8. Re: Antenna Question (Mark Spencer)
9. LithuanicaSAT-1 (W2JV)
10. RV: LituanicaSAT-1 (Hector, CO6CBF)
11. W4UOO please email me (TJ Campie)
12. New to sats, please listen for me half-duplex (TJ Campie)
13. Re: AO-73 over UK (Peter Wilson)
----------------------------------------------------------------------
Message: 1
Date: Wed, 30 Apr 2014 23:10:48 +0100
From: "Peter Wilson" <protest@xxxxxxxxxxx.xxx>
To: "'AMSAT -BB'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AO-73 over UK
Message-ID: <000201cf64c1$0b3e9430$21bbbc90$@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Just tried to work through AO-73 (22:00) - managed to hear myself briefly,
but way off the normal uplink frequency, I had to tune 11Khz higher than
normal, then signal suddenly disappeared?
Did anyone else experience this?
Any ideas?
Peter
G8KEK
------------------------------
Message: 2
Date: Wed, 30 Apr 2014 20:05:23 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Peter Wilson <protest@xxxxxxxxxxx.xxx>
Cc: AMSAT -BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-73 over UK
Message-ID:
<CABzOSOqTr2Kg9PcSU9sN_R6dY0jisiNiqK38_4xfU0T7itLyhg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Peter,
The AO-73 transponder shuts off as soon as it sees sunlight. That is why
your signal suddenly disappeared.
Here is a readout from WinListen of the pass you were working:
29.04.2014 E 21:34:45 161.5 0.5 244.5 595 2818 6 29 2231
-
29.04.2014 E 21:35:00 161.5 1.3 245.2 595 2712 6 30 2231
-
29.04.2014 E 21:35:15 161.4 2.2 245.8 595 2607 6 31 2231
-
29.04.2014 E 21:35:30 161.4 3.2 246.5 595 2502 6 32 2231
-
29.04.2014 E 21:35:45 161.3 4.3 247.1 595 2397 5 33 2231
-
29.04.2014 E 21:36:00 161.3 5.4 247.8 595 2292 5 34 2231
-
29.04.2014 E 21:36:15 161.2 6.6 248.5 595 2188 5 35 2231
-
29.04.2014 E 21:36:30 161.1 7.9 249.1 595 2083 5 36 2231
-
29.04.2014 E 21:36:45 161.0 9.3 249.8 595 1980 4 37 2231
-
29.04.2014 E 21:37:00 160.9 10.7 250.4 595 1876 4 38 2231
-
29.04.2014 E 21:37:15 160.8 12.3 251.1 596 1773 4 39 2231
-
29.04.2014 E 21:37:30 160.7 14.1 251.7 596 1671 4 40 2231
-
29.04.2014 E 21:37:45 160.5 16.0 252.4 596 1569 3 40 2231
-
29.04.2014 E 21:38:00 160.3 18.1 253.1 596 1469 3 41 2231
-
29.04.2014 E 21:38:15 160.1 20.4 253.7 596 1370 3 42 2231
-
29.04.2014 E 21:38:30 159.8 23.1 254.4 597 1272 2 43 2231
-
29.04.2014 E 21:38:45 159.4 26.0 255.0 597 1177 2 44 2231
-
29.04.2014 21:39:00 158.9 29.5 255.7 597 1084 2 45 2231
-
29.04.2014 21:39:15 158.3 33.4 0.3 597 995 2 46 2232
-
29.04.2014 21:39:30 157.4 38.0 1.0 598 910 1 47 2232
-
29.04.2014 21:39:45 156.3 43.5 1.7 598 831 1 48 2232
-
29.04.2014 21:40:00 154.5 49.9 2.3 598 760 1 49 2232
-
29.04.2014 21:40:15 151.7 57.3 3.0 599 699 0 50 2232
-
29.04.2014 21:40:30 146.5 65.9 3.6 599 651 360 51 2232
-
29.04.2014 21:40:45 134.1 75.0 4.3 599 619 359 52 2232
-
29.04.2014 21:41:00 90.7 82.1 4.9 600 605 359 52 2232
-
29.04.2014 21:41:15 25.3 78.6 5.6 600 611 359 53 2232
-
29.04.2014 21:41:30 5.4 69.7 6.3 601 637 358 54 2232
-
29.04.2014 21:41:45 358.2 60.8 6.9 601 679 358 55 2232
-
29.04.2014 21:42:00 354.6 53.0 7.6 601 736 357 56 2232
-
29.04.2014 21:42:15 352.6 46.2 8.2 602 803 357 57 2232
-
29.04.2014 21:42:30 351.2 40.4 8.9 602 880 356 58 2232
-
29.04.2014 21:42:45 350.3 35.5 9.5 603 962 356 59 2232
-
29.04.2014 21:43:00 349.6 31.3 10.2 603 1050 355 60 2232
-
29.04.2014 21:43:15 349.0 27.7 10.9 603 1141 355 61 2232
-
29.04.2014 21:43:30 348.6 24.6 11.5 604 1236 354 61 2232
-
29.04.2014 21:43:45 348.3 21.8 12.2 604 1332 353 62 2232
-
29.04.2014 21:44:00 348.0 19.4 12.8 605 1431 353 63 2232
-
29.04.2014 21:44:15 347.8 17.2 13.5 605 1530 352 64 2232
-
29.04.2014 21:44:30 347.6 15.2 14.1 606 1631 351 65 2232
-
29.04.2014 21:44:45 347.5 13.4 14.8 606 1733 351 66 2232
-
29.04.2014 21:45:00 347.4 11.8 15.5 607 1836 350 67 2232
-
29.04.2014 21:45:15 347.3 10.2 16.1 607 1939 349 68 2232
-
29.04.2014 21:45:30 347.2 8.8 16.8 608 2042 348 69 2232
-
29.04.2014 21:45:45 347.1 7.5 17.4 608 2146 347 69 2232
-
29.04.2014 21:46:00 347.1 6.3 18.1 609 2251 346 70 2232
-
29.04.2014 21:46:15 347.1 5.1 18.7 609 2355 344 71 2232
-
29.04.2014 21:46:30 347.0 4.0 19.4 610 2460 343 72 2232
-
29.04.2014 21:46:45 347.0 3.0 20.1 610 2565 342 73 2232
-
29.04.2014 21:47:00 347.0 2.1 20.7 611 2670 340 74 2232
-
29.04.2014 21:47:15 347.0 1.2 21.4 611 2775 338 74 2232
-
29.04.2014 21:47:30 347.0 0.3 22.0 612 2879 337 75 2232
-
If there isn't an 'E' to the left of the time, the satellite is in the
sunlight. As you can see, the satellite is into the sunlight nearly nine
minutes before your LOS, so you only have a brief period to work through
the transponder.
As far as the frequency instability, it's just a quirk of the satellite.
>From what PA3WEG, the designer of the transponder, has stated, PLL
frequency generation was not possible within the power budget of a 1U
CubeSat when the transponder was designed.
See: http://amsat.org/pipermail/amsat-bb/2013-December/047815.html
73,
Paul, N8HM
On Wed, Apr 30, 2014 at 6:10 PM, Peter Wilson <protest@xxxxxxxxxxx.xxx>wrote:
> Just tried to work through AO-73 (22:00) - managed to hear myself briefly,
> but way off the normal uplink frequency, I had to tune 11Khz higher than
> normal, then signal suddenly disappeared?
>
>
>
> Did anyone else experience this?
>
>
>
> Any ideas?
>
>
>
> Peter
>
> G8KEK
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 3
Date: Wed, 30 Apr 2014 21:03:09 -0400
From: "Rich/wa4bue" <richard.siff@xxxxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] May 3rd SATCOM at Chesapeake Deep Creek Library
Message-ID: <423C1E71724B46E9BCABF01901DEA9F8@xxxxxxxxx>
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original
Hi All,
K4AMG will be demonstrating SAT COMS on May 3rd at the Major Hillard Library
FM 16. Will get on the air as close to 1100 UTC as we can. We will also
have an HF station operating. We will also try a HAND HELD /P station on
SO 50.
At 1600 UTC we will hold a FORUM in the library meeting room. We will
feature the AMSAT Simulator and AO 73.
Please try to work our GOTA station.
We have a new trailer that carries the antenna and our tilt over tower.
This was fabricated by K4NDH.
We have solved a problem we had during our W1AW/4 VA event. Our 2 meter
preamp and switching network died. Fortunately it is under warranty.
Tested the rig last night night after by passing the preamp and did well on
FO 29.
"Our SWR jumped to 5+ :1 and the preamp detracted from the signals on 2
meter down link frequencies" when it went bad.
See our flyer at K4AMG.org under events.
God Bless
R
W4BUE
------------------------------
Message: 4
Date: Wed, 30 Apr 2014 20:04:42 -0700 (PDT)
From: Douglas Phelps <dphelps1@xxxxxxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Antenna Question
Message-ID:
<1398913482.71534.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I have finished building the WRAP rotor. ?Works great. ?Actually I finished
it a month ago. ?I want to put 2 Arrow Antennas on it (and it will lift the
weight) at cross angles so there is a vertical and horizontal VHF and UHF
array. ?The arrows do not work well with circular polarization. ?I tried
taking 2 arrows and make a VHF and UHF crossed YAGI but the 2 antennas will
not tune. so now my idea is to have 2 regular arrow antennas at cross angles
and, using a proper power splitter, feed the horizontal VHF (or UHF)vertical
and horizontal antennas at the same time. ?It seems to me that the E fields
will be at right angles and should not interfere. Also, because I am feeding
them from the same TX, the waves should pretty well maintain phase (that is,
I should not have an cancellation due to phase difference). ?I want to do
this to help eliminate the fade as the satellite rotates. ?I have a receive
preamp also. ?It seems, to me, that as the
vertical signal moves to horizontal that the vertical antenna will receive
less and the horizontal antenna will receive more.
Can anyone, with a greater understanding of antennas than myself, tell why
my idea would not work. ?I would like a technical answer if possible.
Thanks,
Doug
------------------------------
Message: 5
Date: Wed, 30 Apr 2014 13:59:40 -0400
From: Elizabeth McDonnell <em10188@xxxxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Rotor interface
Message-ID: <83356AB2-8587-4F68-A581-206D8E235DDE@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hello everyone,
Does anyone know of a USB interface to control azimuth on one of those basic
Radio Shack T.V. Antenna rotors? in my search I have only found only older
parallel port versions. Thank you all in advance, 73, Keith
------------------------------
Message: 6
Date: Thu, 1 May 2014 07:33:56 -0300
From: "PY5LF" <py5lf@xxxxxxxxxxxxx.xxx.xx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] LituanicaSAT-1
Message-ID: <001101cf6528$dc80cec0$95826c40$@xxxxxxxxxxxxx.xxx.xx>
Content-Type: text/plain; charset="us-ascii"
Hi
The LituanicaSAT-1 has just passed over South America working nicely . Only
the signal is a little weak .
73
PY5LF
Luciano Fabricio
Curitiba-PR-BR GG54jm
<http://www.qrz.com/db/PY5LF> http://www.qrz.com/db/PY5LF
------------------------------
Message: 7
Date: Thu, 1 May 2014 13:09:57 +0200
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
To: "'PY5LF'" <py5lf@xxxxxxxxxxxxx.xxx.xx>, <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Re: LituanicaSAT-1
Message-ID: <001b01cf652d$e32fd450$a98f7cf0$@xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
heavy traffic over Europe... heard EA1JM, LY1R, LY5N, LY2WR, M0SAT, LY2BRA,
UR3CTB, SP9TTX, RL6MR ...
73 Mike
DK3WN
-----Urspr?ngliche Nachricht-----
Von: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx Im
Auftrag von PY5LF
Gesendet: Donnerstag, 1. Mai 2014 12:34
An: AMSAT-BB@xxxxx.xxx
Betreff: [amsat-bb] LituanicaSAT-1
Hi
The LituanicaSAT-1 has just passed over South America working nicely . Only
the signal is a little weak .
73
PY5LF
Luciano Fabricio
Curitiba-PR-BR GG54jm
<http://www.qrz.com/db/PY5LF> http://www.qrz.com/db/PY5LF
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Thu, 1 May 2014 07:45:49 -0400
From: "Mark Spencer" <wa8sme@xxxxxxx.xxx>
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Antenna Question
Message-ID: <000c01cf6532$e5d86cd0$b1894670$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Doug,
I doubt that I have greater understanding of antennas than you do, but I'll
give your question a shot. Actually, I have been working on circularly
polarizing the ARROWS with the WRAPS lately, a work still in progress but
almost complete. So I am throwing out the draft information I have been
working on to date.
You can circularly polarize a pair of ARROWs and they actually work well
together from my experience (one of the reasons I suspect is that the feed
system of the individual antennas is very well matched). If you are
mounting the two antennas virtually on the same boom (sticking them right
next to each other) it might get pretty crowded and interactions
complicated. I have mounted two ARROWs separated horizontally about 3 feet
apart with pretty good success. I have done this with stock ARROWs, and
also with one side with the two meter elements, and the other side with the
70 CM elements (had to drill extra holes for the 70 CM mod), both ways
worked about the same. The tricky part is coming up with the right feed
lines (the transformer lines and the phasing line).
I have a first draft of an article I am working on that describes my latest
effort to come up with a polarity switching arrangement for ARROWs with the
WRAPS, it can be downloaded here (if you have download issues, let me know
and I'll try and get it to you another way).
Click here to view Circling the WRAPS
<https://www.dropbox.com/l/xvKKUtfwUN5gFhGyCiXjua?>
I will be adding to the conclusion of the piece some suggestions on where to
include an external diplexer in the line to handle the single feed line
issue that you mention in your post.
Anyway, I hope this will stimulate some ideas.
Mark
Mark Spencer, WA8SME
860-381-5335
mspencer@xxxx.xxx
------------------------------
Message: 9
Date: Thu, 01 May 2014 09:56:47 -0400
From: "W2JV" <PeteW2JV@xxxxxxx.xxx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] LithuanicaSAT-1
Message-ID: <275EE5554EDA472C962CB9431506D8B8@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello,
The downlink was strong at 16 degrees at 13:39 U, I heard CO6CBF, well done
to the team.
73 Pete
W2JV
------------------------------
Message: 10
Date: Thu, 1 May 2014 11:00:59 -0400
From: "Hector, CO6CBF" <co6cbf@xxxxxx.xx.xx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] RV: LituanicaSAT-1
Message-ID: <001c01cf654e$2b506fe0$81f14fa0$@xx.xx>
Content-Type: text/plain; charset="us-ascii"
Hello to all!
LituanicaSat-1 was sounding very good over the Caribbean (Cienfuegos EL92sd,
Cuba). Nice signal for just 150mw!
I heard Pete, W2JV and worked Frank, K4FEG. I was running just 5W into an
ARROW antenna.
Congratulations to the LituanicaSAT-1 team!
73!
Hector, CO6CBF / KF5YXV
------------------------------
Message: 11
Date: Thu, 1 May 2014 07:55:30 -0500
From: TJ Campie <tom.campie@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] W4UOO please email me
Message-ID:
<CAK4_Zq02KeQEg6medmcpkMUF1ops0CxaRQwgMc+RvqCt33gjyw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Mike, I think you subscribe to the list, please send me an email. I'd like
to QSL our contact this morning on FO-29.
Pardon the bandwidth.
73, W0EA
TJ
----
QRP ARCI #14612 | CW Ops #953 | SKCC #4593T
NAQCC #3768 | Flying Pigs QRP #2254
http://W0EA.us
*Because QRO is too easy (but sometimes required!)*
------------------------------
Message: 12
Date: Thu, 1 May 2014 06:45:50 -0500
From: TJ Campie <tom.campie@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] New to sats, please listen for me half-duplex
Message-ID:
<CAK4_Zq1JOtw212X+X1xQm=1VVYFuruFrjMSjJ3KSaRVM7P64ZA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hello all! I am w0ea and I just got an FT817 so I will be joining the mix
on the linear satellites. Please help me out us you hear me by giving long
calls since I can only tune my receiver. I'm still figuring out the splits
and Doppler so please forgive me if I accidentally step on your qso in
progress.
Hope to work you soon from en41.
--
73, W0EA
TJ
----
QRP ARCI #14612 | CW Ops #953 | SKCC #4593T
NAQCC #3768 | Flying Pigs QRP #2254
http://W0EA.us
*Because QRO is too easy (but sometimes required!)*
------------------------------
Message: 13
Date: Thu, 1 May 2014 17:15:12 +0100
From: "Peter Wilson" <protest@xxxxxxxxxxx.xxx>
To: "'Paul Stoetzer'" <n8hm@xxxx.xxx>
Cc: 'AMSAT -BB' <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-73 over UK
Message-ID: <001a01cf6558$8862d6a0$992883e0$@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset="utf-8"
Paul,
Many thanks for the detailed response - all understood.
It's easy to forget that at that altitude the sun comes into line of sight.
Peter
G8KEK
From: prstoetzer@xxxxx.xxx [mailto:prstoetzer@xxxxx.xxxx On Behalf Of Paul
Stoetzer
Sent: 01 May 2014 01:05
To: Peter Wilson
Cc: AMSAT -BB
Subject: Re: [amsat-bb] AO-73 over UK
Hi Peter,
The AO-73 transponder shuts off as soon as it sees sunlight. That is why
your signal suddenly disappeared.
Here is a readout from WinListen of the pass you were working:
29.04.2014 E 21:34:45 161.5 0.5 244.5 595 2818 6 29 2231 -
29.04.2014 E 21:35:00 161.5 1.3 245.2 595 2712 6 30 2231 -
29.04.2014 E 21:35:15 161.4 2.2 245.8 595 2607 6 31 2231 -
29.04.2014 E 21:35:30 161.4 3.2 246.5 595 2502 6 32 2231 -
29.04.2014 E 21:35:45 161.3 4.3 247.1 595 2397 5 33 2231 -
29.04.2014 E 21:36:00 161.3 5.4 247.8 595 2292 5 34 2231 -
29.04.2014 E 21:36:15 161.2 6.6 248.5 595 2188 5 35 2231 -
29.04.2014 E 21:36:30 161.1 7.9 249.1 595 2083 5 36 2231 -
29.04.2014 E 21:36:45 161.0 9.3 249.8 595 1980 4 37 2231 -
29.04.2014 E 21:37:00 160.9 10.7 250.4 595 1876 4 38 2231 -
29.04.2014 E 21:37:15 160.8 12.3 251.1 596 1773 4 39 2231 -
29.04.2014 E 21:37:30 160.7 14.1 251.7 596 1671 4 40 2231 -
29.04.2014 E 21:37:45 160.5 16.0 252.4 596 1569 3 40 2231 -
29.04.2014 E 21:38:00 160.3 18.1 253.1 596 1469 3 41 2231 -
29.04.2014 E 21:38:15 160.1 20.4 253.7 596 1370 3 42 2231 -
29.04.2014 E 21:38:30 159.8 23.1 254.4 597 1272 2 43 2231 -
29.04.2014 E 21:38:45 159.4 26.0 255.0 597 1177 2 44 2231 -
29.04.2014 21:39:00 158.9 29.5 255.7 597 1084 2 45 2231 -
29.04.2014 21:39:15 158.3 33.4 0.3 597 995 2 46 2232 -
29.04.2014 21:39:30 157.4 38.0 1.0 598 910 1 47 2232 -
29.04.2014 21:39:45 156.3 43.5 1.7 598 831 1 48 2232 -
29.04.2014 21:40:00 154.5 49.9 2.3 598 760 1 49 2232 -
29.04.2014 21:40:15 151.7 57.3 3.0 599 699 0 50 2232 -
29.04.2014 21:40:30 146.5 65.9 3.6 599 651 360 51 2232 -
29.04.2014 21:40:45 134.1 75.0 4.3 599 619 359 52 2232 -
29.04.2014 21:41:00 90.7 82.1 4.9 600 605 359 52 2232 -
29.04.2014 21:41:15 25.3 78.6 5.6 600 611 359 53 2232 -
29.04.2014 21:41:30 5.4 69.7 6.3 601 637 358 54 2232 -
29.04.2014 21:41:45 358.2 60.8 6.9 601 679 358 55 2232 -
29.04.2014 21:42:00 354.6 53.0 7.6 601 736 357 56 2232 -
29.04.2014 21:42:15 352.6 46.2 8.2 602 803 357 57 2232 -
29.04.2014 21:42:30 351.2 40.4 8.9 602 880 356 58 2232 -
29.04.2014 21:42:45 350.3 35.5 9.5 603 962 356 59 2232 -
29.04.2014 21:43:00 349.6 31.3 10.2 603 1050 355 60 2232 -
29.04.2014 21:43:15 349.0 27.7 10.9 603 1141 355 61 2232 -
29.04.2014 21:43:30 348.6 24.6 11.5 604 1236 354 61 2232 -
29.04.2014 21:43:45 348.3 21.8 12.2 604 1332 353 62 2232 -
29.04.2014 21:44:00 348.0 19.4 12.8 605 1431 353 63 2232 -
29.04.2014 21:44:15 347.8 17.2 13.5 605 1530 352 64 2232 -
29.04.2014 21:44:30 347.6 15.2 14.1 606 1631 351 65 2232 -
29.04.2014 21:44:45 347.5 13.4 14.8 606 1733 351 66 2232 -
29.04.2014 21:45:00 347.4 11.8 15.5 607 1836 350 67 2232 -
29.04.2014 21:45:15 347.3 10.2 16.1 607 1939 349 68 2232 -
29.04.2014 21:45:30 347.2 8.8 16.8 608 2042 348 69 2232 -
29.04.2014 21:45:45 347.1 7.5 17.4 608 2146 347 69 2232 -
29.04.2014 21:46:00 347.1 6.3 18.1 609 2251 346 70 2232 -
29.04.2014 21:46:15 347.1 5.1 18.7 609 2355 344 71 2232 -
29.04.2014 21:46:30 347.0 4.0 19.4 610 2460 343 72 2232 -
29.04.2014 21:46:45 347.0 3.0 20.1 610 2565 342 73 2232 -
29.04.2014 21:47:00 347.0 2.1 20.7 611 2670 340 74 2232 -
29.04.2014 21:47:15 347.0 1.2 21.4 611 2775 338 74 2232 -
29.04.2014 21:47:30 347.0 0.3 22.0 612 2879 337 75 2232 -
If there isn't an 'E' to the left of the time, the satellite is in the
sunlight. As you can see, the satellite is into the sunlight nearly nine
minutes before your LOS, so you only have a brief period to work through the
transponder.
As far as the frequency instability, it's just a quirk of the satellite.
>From what PA3WEG, the designer of the transponder, has stated, PLL
frequency generation was not possible within the power budget of a 1U
CubeSat when the transponder was designed.
See: http://amsat.org/pipermail/amsat-bb/2013-December/047815.html
73,
Paul, N8HM
On Wed, Apr 30, 2014 at 6:10 PM, Peter Wilson <protest@xxxxxxxxxxx.xxx
<mailto:protest@xxxxxxxxxxx.xxx> > wrote:
Just tried to work through AO-73 (22:00) - managed to hear myself briefly,
but way off the normal uplink frequency, I had to tune 11Khz higher than
normal, then signal suddenly disappeared?
Did anyone else experience this?
Any ideas?
Peter
G8KEK
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End of AMSAT-BB Digest, Vol 9, Issue 155
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