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CX2SA > SATDIG 10.11.15 03:22l 774 Lines 24690 Bytes #999 (0) @ WW
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Sent: 151110/0113Z @:CX2SA.SAL.URY.SOAM #:33211 [Salto] FBB7.00e $:AMSATBB10350
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: FM signal on FO-29? (Daniel Est?vez)
2. Re: AO-85 Testing November 8 and 9 (Mark L. Hammond)
3. EO-79 Update (Wouter Weggelaar)
4. Re: AO-85 Testing November 8 and 9 (Scott)
5. Re: AO-85 Testing November 8 and 9 (alancresswell@xxxx.xx.xxx
6. Re: FM signal on FO-29? (Zach Leffke)
7. Re: AO-85 Testing November 8 and 9 (Mark L. Hammond)
8. FO-29 FM (Bob- W7LRD)
9. Re: FO-29 FM (Bob- W7LRD)
10. Re: AO-85 Testing November 8 and 9 (alancresswell@xxxx.xx.xxx
11. Fo29 fm signals (jeffory broughton)
12. Ao85 audio (jeffory broughton)
13. Re: Ao85 audio (J. Boyd (JR2TTS))
14. Re: FO-29 FM signals (Glenn Miller - AA5PK)
15. AO-85 COR mode (Nicholas Mahr KE8AKW)
----------------------------------------------------------------------
Message: 1
Date: Mon, 9 Nov 2015 20:29:12 +0000
From: Daniel Est?vez <daniel@xxxxxxxx.xxx>
To: Zach Leffke <zleffke@xx.xxx>, Robert Bruninga <bruninga@xxxx.xxx>
Cc: amsat bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID: <56410218.2060105@xxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Dear Bob and Zach,
This paper might be worth looking at:
http://www.dtic.mil/dtic/tr/fulltext/u2/409103.pdf
As far as I know, it started the whole business of location by
measurement of Doppler shift.
Apparently, according to the success of project Transit, it is possible to:
a) Compute the TLEs of a satellite by using just a few minutes of the
Doppler curve of the beacon of a satellite, as received on a ground
station with known location.
b) Compute the location of a ground station, by using just a few minutes
of the Doppler curve of the beacon of a satellite with known TLEs, as
received on said ground station.
Of course, several variation on this are possible, such as the one which
is discussed here:
Compute the location of a ground station by using the Doppler curve of
its transmissions during a pass, as received on a satellite with known TLEs.
It seems that the key point in all this is that the Doopler curve
depends independently on all the parameters in question (so not a cubic
polynomial, which depends on fewer parameters).
73,
Dani M0HXM/EA4GPZ.
El 09/11/15 a las 17:59, Zach Leffke escribi?:
> No worries, I thought on it a bit more and I think a cubic polynomial is
> the right fit. I also found some python tools for regression
> calculations that I think will be useful for this. Also, I think this
> is pretty similar to how the COSPAS/SARSAT system used to locate lost
> ships (EPIRBs) and downed Aircraft (ELTs) before the proliferation of
> GPS and its inclusion in the locator beacons.
------------------------------
Message: 2
Date: Mon, 9 Nov 2015 15:32:06 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID:
<CAPRXzyr=cHUk1BaTCjBvrj--F_QU4R5nCkoM2HBUxN+j0xkjFA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Thanks for the report, Alan. The Command Team really appreciates reports
like this during our testing....keep the reports coming!
73,
Mark N8MH
_____________
Date: Mon, 9 Nov 2015 19:16:42 -0000
From: <alancresswell@xxxx.xx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <5E2C7101606047E89E91998406543C94@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
AO-85 Orbit 461
No telemetry, No tone required for access. Excellent signal from the
transponder on the 1855 UT 15 deg pass over ZL this morning.
Alan
ZL2BX
------------------------------
Message: 3
Date: Mon, 9 Nov 2015 22:03:33 +0100
From: Wouter Weggelaar <wouterweg@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] EO-79 Update
Message-ID:
<CAKXf1rG4wHxaOEQz+DHEFUUkW+texUzJ0FEvwO8YAS3VexL5Xw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi All,
With this message I would like to inform you of the status and plans for
QB50p1 - EO-79.
Earlier testing campaigns indicate that the AMSAT-UK/AMSAT-NL transponder
on board of this spacecraft is in good health. We have activated the
transponder on various occasions for testing purposes.
At the moment we believe the power system is capable of sustaining
transponder operations indefinitely. ISIS (the satellite designer and
operator) still needs to write and apply a software patch that would keep
the transponder running. The current logic in the satellite will switch off
the transponder if a reset occurs of the On Board Computer or power system.
Efforts are being made to allow usage of the transponder in the mean time
and also allow select command stations to take the satellite out of safe
mode if it does reset.
ISIS will continue to monitor all telemetry and the satellites health.
The precursor satellites have gathered valuable data about the sensor
payloads, and the lessons learnt are being implemented in the flight units
for the QB50 main mission.
We will still have to wait until procedures are in place and the activation
is cleared by the operator and owners of the satellite, but we are nearly
ready for the activation of another transponder!
Transponder activations will be announced on this BB.
On behalf of AMSAT-NL and the ISIS operations team I would like to thank
the community for supporting our mission and thank you for your patience.
73s,
Wouter Weggelaar
PA3WEG
AMSAT-NL
------------------------------
Message: 4
Date: Mon, 9 Nov 2015 16:09:25 -0500
From: "Scott" <scott23192@xxxxx.xxx>
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <40C1DA1EC8994538B11A3F046DD846E2@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Likewise, on the 1611 UTC pass up the East Coast USA this morning I was not
able to decode any telemetry (even on replay of recording) but there were
numerous, virtually non-stop voice contacts and the audio was extremely
clear and crisp.
Sure do appreciate all the work!
-Scott, K4KDR
Montpelier, VA USA
------------------------------------------------------------------------------
--
----- Original Message -----
From: Mark L. Hammond
To: Amsat - BBs
Sent: Monday, November 09, 2015 15:32
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Thanks for the report, Alan. The Command Team really appreciates reports
like this during our testing....keep the reports coming!
73,
Mark N8MH
_____________
Date: Mon, 9 Nov 2015 19:16:42 -0000
From: <alancresswell@xxxx.xx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <5E2C7101606047E89E91998406543C94@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
AO-85 Orbit 461
No telemetry, No tone required for access. Excellent signal from the
transponder on the 1855 UT 15 deg pass over ZL this morning.
Alan
ZL2BX
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Mon, 9 Nov 2015 21:12:39 -0000
From: <alancresswell@xxxx.xx.xx>
To: "Mark L. Hammond" <marklhammond@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <DAE447381723496E97EBA70A90167351@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Mark,
Well another pass to report. 09-11-15 at AOS 2035, 58 Deg El.
As before , No telemetry, no tone required, solid response from transponder.
Uplink 2.5w to nominal 15db yagi.
Up FMN, down FMN.
Downlink crossed 10 el Yagi.
Downlink signal pushing my TS-2000 to full scale - S9 + 60db for most of
the pass.
Hope that helps.
73 Alan
ZL2BX
-----Original Message-----
From: Mark L. Hammond
Sent: Monday, November 9, 2015 8:32 PM
To: Amsat - BBs
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Thanks for the report, Alan. The Command Team really appreciates reports
like this during our testing....keep the reports coming!
73,
Mark N8MH
_____________
Date: Mon, 9 Nov 2015 19:16:42 -0000
From: <alancresswell@xxxx.xx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <5E2C7101606047E89E91998406543C94@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
AO-85 Orbit 461
No telemetry, No tone required for access. Excellent signal from the
transponder on the 1855 UT 15 deg pass over ZL this morning.
Alan
ZL2BX
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Mon, 9 Nov 2015 16:20:01 -0500
From: Zach Leffke <zleffke@xx.xxx>
Cc: amsat bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID: <56410E01.80209@xx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Daniel,
Thanks for the info. I'll look into it more when I get a free
moment. And for the cubic thing, I just meant that it appears that the
doppler S-curve looks like a third order polynomial over the course of a
full pass. After a quick google search, the first image at this link is
what I mean (in this case envision time along the y axis and doppler
offset along the x axis).
http://www.biology.arizona.edu/biomath/tutorials/polynomial/graphingpolynomial
s.html
But I haven't looked into this fully yet, and it sounds like you might
be saying that its not that simple. I was just looking into regression
equations for the purposes of curve fitting from a number of discrete
doppler offset observations. At a quick glance, the cubic polynomial
seemed like the right 'shape' for the regression.
I think what you might be warning about is that, in doing so, because
there are a large number of parameters that go into the generation of
the doppler (and its s-curve), that we might be losing necessary
fidelity in the data by assuming a cubic polynomial? Honestly this all
kind of new territory for me, so any and all advice is welcome.
Thanks again for the info, much appreciated.
-Zach, KJ4QLP
Research Associate
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
On 11/9/2015 3:29 PM, Daniel Est?vez wrote:
> Dear Bob and Zach,
>
> This paper might be worth looking at:
> http://www.dtic.mil/dtic/tr/fulltext/u2/409103.pdf
>
> As far as I know, it started the whole business of location by
> measurement of Doppler shift.
>
> Apparently, according to the success of project Transit, it is possible to:
>
> a) Compute the TLEs of a satellite by using just a few minutes of the
> Doppler curve of the beacon of a satellite, as received on a ground
> station with known location.
>
> b) Compute the location of a ground station, by using just a few minutes
> of the Doppler curve of the beacon of a satellite with known TLEs, as
> received on said ground station.
>
> Of course, several variation on this are possible, such as the one which
> is discussed here:
>
> Compute the location of a ground station by using the Doppler curve of
> its transmissions during a pass, as received on a satellite with known TLEs.
>
> It seems that the key point in all this is that the Doopler curve
> depends independently on all the parameters in question (so not a cubic
> polynomial, which depends on fewer parameters).
>
> 73,
>
> Dani M0HXM/EA4GPZ.
>
> El 09/11/15 a las 17:59, Zach Leffke escribi?:
>> No worries, I thought on it a bit more and I think a cubic polynomial is
>> the right fit. I also found some python tools for regression
>> calculations that I think will be useful for this. Also, I think this
>> is pretty similar to how the COSPAS/SARSAT system used to locate lost
>> ships (EPIRBs) and downed Aircraft (ELTs) before the proliferation of
>> GPS and its inclusion in the locator beacons.
------------------------------
Message: 7
Date: Mon, 9 Nov 2015 16:37:34 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: Alan Cresswell <alancresswell@xxxx.xx.xx>, Amsat - BBs
<amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID:
<CAPRXzypH9zSq1_nPtd15n5UzqkaK=D9RawGMc2xTgMk+G157wA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Thanks, Alan. I wish I could report good successes with 2.5W. I'm still
trying to find the right combinations...orientation/attitude of the bird
surely fits into the picture.
You have a 2M preamp I suppose?
Mark N8MH
On Mon, Nov 9, 2015 at 4:12 PM, <alancresswell@xxxx.xx.xx> wrote:
> Hi Mark,
>
> Well another pass to report. 09-11-15 at AOS 2035, 58 Deg El.
> As before , No telemetry, no tone required, solid response from
> transponder.
> Uplink 2.5w to nominal 15db yagi.
> Up FMN, down FMN.
> Downlink crossed 10 el Yagi.
> Downlink signal pushing my TS-2000 to full scale - S9 + 60db for most of
> the pass.
>
> Hope that helps.
> 73 Alan
> ZL2BX
>
>
> -----Original Message----- From: Mark L. Hammond
> Sent: Monday, November 9, 2015 8:32 PM
> To: Amsat - BBs
> Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
>
> Thanks for the report, Alan. The Command Team really appreciates reports
> like this during our testing....keep the reports coming!
>
>
> 73,
>
> Mark N8MH
>
>
>
>
> _____________
> Date: Mon, 9 Nov 2015 19:16:42 -0000
> From: <alancresswell@xxxx.xx.xx>
> To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
> Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
> Message-ID: <5E2C7101606047E89E91998406543C94@xxxxxxxxxx>
> Content-Type: text/plain; format=flowed; charset="utf-8";
> reply-type=original
>
> AO-85 Orbit 461
> No telemetry, No tone required for access. Excellent signal from the
> transponder on the 1855 UT 15 deg pass over ZL this morning.
>
> Alan
> ZL2BX
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 8
Date: Mon, 9 Nov 2015 21:44:22 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] FO-29 FM
Message-ID:
<658790390.858812.1447105462034.JavaMail.zimbra@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
This last pass I copied a non-ham FM signal starting at 435.897. Talking
about a tractor and construction of "something". Went LOS after only the
West coast was in the foot print. How do we find these clowns?
73 Bob W7LRD
------------------------------
Message: 9
Date: Mon, 9 Nov 2015 21:49:56 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FO-29 FM
Message-ID:
<626581240.861838.1447105796353.JavaMail.zimbra@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
the starting frequency should be 435.867
----- Original Message -----
From: "Bob- W7LRD" <w7lrd@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Monday, November 9, 2015 1:44:22 PM
Subject: [amsat-bb] FO-29 FM
This last pass I copied a non-ham FM signal starting at 435.897. Talking
about a tractor and construction of "something". Went LOS after only the
West coast was in the foot print. How do we find these clowns?
73 Bob W7LRD
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Mon, 9 Nov 2015 22:05:44 -0000
From: <alancresswell@xxxx.xx.xx>
To: "Mark L. Hammond" <marklhammond@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <1DCBF7073A784AF78B66BB0564F05905@xxxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
Hi Mark
Yes, I use preamps on both 70cm and 2m as my antennas are more than 30 m
away on the top of the hill. About 10db gain on 2m to overcome cable losses.
A noticeable effect in ZL is that as AO-85 is travelling South to North,
often there comes a point late in the pass where it is virtually impossible
to access the transponder. This sometimes happens so suddenly that the
first couple of times I thought the transponder must have shut down. The
same effect has been noticed in VK as well, and the assumption is that it is
related to antenna orientation in the Southern hemisphere. The North to
South passes are in the early hours of the morning here at the moment so I
have not had the opportunity to see what happens there.
73
Alan
ZL2BX
From: Mark L. Hammond
Sent: Monday, November 9, 2015 9:37 PM
To: Alan Cresswell ; Amsat - BBs
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Thanks, Alan. I wish I could report good successes with 2.5W. I'm still
trying to find the right combinations...orientation/attitude of the bird
surely fits into the picture.
You have a 2M preamp I suppose?
Mark N8MH
On Mon, Nov 9, 2015 at 4:12 PM, <alancresswell@xxxx.xx.xx> wrote:
Hi Mark,
Well another pass to report. 09-11-15 at AOS 2035, 58 Deg El.
As before , No telemetry, no tone required, solid response from transponder.
Uplink 2.5w to nominal 15db yagi.
Up FMN, down FMN.
Downlink crossed 10 el Yagi.
Downlink signal pushing my TS-2000 to full scale - S9 + 60db for most of
the pass.
Hope that helps.
73 Alan
ZL2BX
-----Original Message----- From: Mark L. Hammond
Sent: Monday, November 9, 2015 8:32 PM
To: Amsat - BBs
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Thanks for the report, Alan. The Command Team really appreciates reports
like this during our testing....keep the reports coming!
73,
Mark N8MH
_____________
Date: Mon, 9 Nov 2015 19:16:42 -0000
From: <alancresswell@xxxx.xx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 Testing November 8 and 9
Message-ID: <5E2C7101606047E89E91998406543C94@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
AO-85 Orbit 461
No telemetry, No tone required for access. Excellent signal from the
transponder on the 1855 UT 15 deg pass over ZL this morning.
Alan
ZL2BX
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
--
Mark L. Hammond [N8MH]
------------------------------
Message: 11
Date: Mon, 9 Nov 2015 19:17:54 -0500
From: jeffory broughton <jefforybroughton@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Fo29 fm signals
Message-ID:
<CACm2je3vUADGdyivASBNgPmujssyFXBnBxVSYKUJBy2MUYsHQQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Sounds like the same crew I heard loading trucks with dirt etc.when I heard
it all that was in the footprint was canada,north dakota,michigan etc
Jeff Wb8rjy
jeff broughton
------------------------------
Message: 12
Date: Mon, 9 Nov 2015 19:23:40 -0500
From: jeffory broughton <jefforybroughton@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Ao85 audio
Message-ID:
<CACm2je2sUVc-rqj478G5MD-EB=-jnPRZAMSXudU-DPQ0Yh1LRA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Wholly smokes,just worked AC0RA on AO85 which he informs me was in carrier
mode,the downlink audio was outstanding.it was every bit as good as what I
experience on SO50 and Lilacsat-2. What fun!
jeff broughton WB8RJY
------------------------------
Message: 13
Date: Tue, 10 Nov 2015 09:31:35 +0900
From: "J. Boyd (JR2TTS)" <the2belo@xxx.xxxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Ao85 audio
Message-ID: <20151110092953.86EA.THE2BELO@xxx.xxxxxxx.xx.xx>
Content-Type: text/plain; charset="UTF-8"
On Mon, 9 Nov 2015 19:23:40 -0500, jeffory broughton
<jefforybroughton@xxxxx.xxx> wrote:
> Wholly smokes,just worked AC0RA on AO85 which he informs me was in carrier
> mode,the downlink audio was outstanding.it was every bit as good as what I
> experience on SO50 and Lilacsat-2. What fun!
Can I ask what power you were running on the uplink? In previous
attempts I had been running 5W when the transponder was on and the PL
tone active, and only ever succeeded in reaching it once -- and my own audio
was very distant and noisy.
--
J. Boyd, JR2TTS/NI3B
the2belo@xxx.xxxxxxx.xx.xx
http://www.flickr.com/photos/the2belo/
http://www.qrz.com/db/JR2TTS
Twitter: @xxxxxxxx
------------------------------
Message: 14
Date: Mon, 9 Nov 2015 18:49:50 -0600
From: "Glenn Miller - AA5PK" <aa5pk@xxxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] FO-29 FM signals
Message-ID: <85310990EBC048B0885D3E5FB6C2C45F@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I frequently heard FM QRM at the extreme upper end of the XW-2F downlink
around 146 MHz. Spanish speaking male and female
voices. Likely unlicensed activity around 435.325 MHz.
Glenn AA5PK
DM91
------------------------------
Message: 15
Date: Mon, 9 Nov 2015 20:12:06 -0500
From: Nicholas Mahr KE8AKW <nicholasmahr1@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] AO-85 COR mode
Message-ID:
<CAGu+VYsHPu53fnT3-j6awuYRjg6YF7oO5uk+Pu8e7maR01HV+g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hello all,
I listened to both the November 8th 17:15 UTC pass and the November 9th
0:00 UTC pass, both of which I was using my 17el beam with HDSDR recording
IF files and piping it into Foxtlm, decoding telemetry, Both recording are
in my dropbox file here
https://www.dropbox.com/sh/bhzpp4aer0i3j0m/AABiTWdkA_zj2OGMbnNP6H7Ia?dl=0 .
On the November 8th 17:15 UTC pass I hear Jerry N0JY testing with someone
else, testing out power levels on the satellite with I believe telemetry
on. On the recent November 9th 0:00 UTC pass I hear no telemetry on the
beginning of AOS and hear Jerry and Mark and Drew testing the bird, than
mid way through the pass the telemetry comes back on, Interestingly enough
I see in HDSDR the downlink jumps up in frequency slightly when the bird
switches between COR mode and Repeater/Telemetry mode.
As far as I can tell, COR mode on AO-85 slightly sounds better on the
downlink, the audio sounds somewhat better, But I dont think its going to
affect receiver sensitivity. The passes with the COR mode on, the downlink
sounds much stronger and has better audio. I have yet to work in fully in
COR mode to see how good the receiver sensitivity is.
73's KE8AKW Nick
(Go Fox)
------------------------------
Subject: Digest Footer
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End of AMSAT-BB Digest, Vol 10, Issue 350
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