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CX2SA > SATDIG 01.07.16 16:43l 761 Lines 27508 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: US barriers to orbit (Re: Amateur
communicationsatellites) (Graham Shirville)
2. SatPC32 leading the satellite (Jim White)
3. Re: SatPC32 leading the satellite (Erich Eichmann)
4. AO-85 9k6 data (skristof@xxxxxxx.xxxx
5. Mode K (rsoifer1@xxx.xxxx
6. Re: SatPC32 leading the satellite (Jim White)
7. Re: Mode K (fact and fiction?) (Robert Bruninga)
8. Re: AO-85 9k6 data (Alan)
9. Re: AO-85 9k6 data (Scott)
10. Re: AO-85 9k6 data (Andrew Glasbrenner)
11. Re: AO-85 9k6 data (skristof@xxxxxxx.xxxx
12. Re: Mode K (fact and fiction?) (RSoifer1@xxx.xxxx
----------------------------------------------------------------------
Message: 1
Date: Thu, 30 Jun 2016 22:35:42 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
To: "David G0MRF" <g0mrf@xxx.xxx>, <amsat-bb@xxxxx.xxx>,
<bruninga@xxxx.xxx>, <n8hm@xxxx.xxx>
Subject: Re: [amsat-bb] US barriers to orbit (Re: Amateur
communicationsatellites)
Message-ID: <0F4EB3AE39774544B94E22EDA2D64937@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi All,
Just to expand on David's comments.
The AO73 "Loopback" Mode is an AO16 type FM in and DSB out mode. It is
intended only to be used in event that our on-board microprocessor dies! We
have never done it but i guess that if were to run the high power telemetry
continuously then this would be also power negative over an orbit.
The first thing that I always check on the Data Warehouse is that (in the
sun) the "total photo current number" is higher than the "total system
current" number. This positive situation has been achieved in part by
running the on-board oscillators at very low currents. This has resulted in
some unwanted temperature dependency of their performance. However the
internal temperatures on this 1U spacecraft vary by some 25C each orbit so
it is perhaps to be expected.
You will note that UKube-1 which has a similar FUNcube sub-system is more
stable as the internal temperatures, it being a 3U spacecraft, only vary by
approx 6C each orbit.. Please be aware that
Nayif-1, expected to be launched late this year uses much more stable
oscillator chains but that this has only been achieved at the cost of them
being more power hungry. We will have to wait and see how the power budget
actually works out in orbit.
We do have a capability to set both FUNcube-1 and Nayif-1 spacecraft to only
switch autonomously to operate in transponder mode every "x" orbits/eclipses
with an adjustable ratio of "receive only" eclipse periods. On FUNcube-1 we
have never had to implement this (outside the test lab). If we do get to
middle age with lower battery capacity and lower solar panel efficiency
then we have this as an available option or "workaround".
We are quite proud of the number of different use cases that we thought up
and satisfied during the early design phase. We considered all manner of
different possible power and temperature scenarios. Hopefully most will
never be needed.
73
Graham
G3VZV
-----Original Message-----
From: David G0MRF via AMSAT-BB
Sent: Thursday, June 30, 2016 11:07 AM
To: amsat-bb@xxxxx.xxx ; bruninga@xxxx.xxx ; n8hm@xxxx.xxx
Subject: Re: [amsat-bb] US barriers to orbit (Re: Amateur
communicationsatellites)
Hi Paul / Bob
We are fortunate with AO-73, If I recall correctly, it is power positive in
all modes except "Loopback" where it does drain the battery if left on 24/7
Elipse detection was our key to success. However, we have come to realise
that an adjustable timer that allows a satellite to charge for X minutes
after entering sunlight
provides much more control over long term management of the power budget and
battery life. - Another lesson learned.
Thanks
David G0MRF
AO-73 is a 1U cubesat and power positive with a 20 kHz wide linear
transponder at about 300 mW PEP. With a 10m downlink, you have less
path loss to contend with than on 2m (but more loss through the
ionosphere), but I'd think it would be doable if the passband is kept
relatively narrow and the power output low.
73,
Paul, N8HM
On Wed, Jun 29, 2016 at 6:26 PM, Robert Bruninga <bruninga at usna.edu>
wrote:
>> How big and or heavy will this 15/10 bird be?
>
> A small cubesat. To support a linear transponder takes a lot of power.
> We
> might have to leave it off at night. Not sure until we do the analysis.
> Bob
>
> -----Original Message-----
> From: Robert Bruninga [mailto:bruninga at usna.edu]
> Sent: Wednesday, June 29, 2016 3:28 PM
> To: AMSAT-BB
> Cc: bruninga at usna.edu
> Subject: RE: [amsat-bb] US barriers to orbit (Re: Amateur communication
> satellites)
>
>>> Within the US, when someone like Bob, WB4APR, tries to build amateur
>>> communication sats, he runs into needless obstacles from FCC and NTIA.
_______________________________________________
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: 2
Date: Thu, 30 Jun 2016 19:55:09 -0600
From: Jim White <jim@xxxxxxxxxxxxxxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SatPC32 leading the satellite
Message-ID: <5775CD7D.6090601@xxxxxxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
I was at a university ground station today and noted their antennas were
not keeping up with their satellite on a high elevation pass. They are
using SatPC32 with the G5500 rotor. They have the dead band set to 3
degrees. Since they are using a pair of long UHF Yagis for a total of
21dB gain there were some lost packets for about 2 minutes or so around
TCA. Their sat was deployed from the ISS so is currently at about 400km
altitude which means it's zipping by rather quickly when the elevation
is above about 75 degrees or so.
In the past I've used tracking programs that allowed a 'lead' setting.
That is, you could tell the software to lead the satellite by a few
seconds. That did a pretty good job keeping the sat in the beam width
when the AZ was changing quickly. I'm not finding that setting in
SatPC32. Is there one, or another setting to accomplish the same thing?
Jim
------------------------------
Message: 3
Date: Fri, 1 Jul 2016 08:28:09 +0200
From: Erich Eichmann <erich.eichmann@xxxxxxxx.xx>
To: Jim White <jim@xxxxxxxxxxxxxxxxx.xxx>, AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] SatPC32 leading the satellite
Message-ID: <0e1ad2fe-16ac-e1e2-ddf0-1f51aeed8104@xxxxxxxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
There are the following options in menu "Rotor Setup" they could have
used to update the azimuth and elevation antenna positions:
a. in time increments, say 3 seconds or less.
b. when the satellite's position (azimuth or elevation) changed by a
certain CONSTANT amount of degrees (dead band), say 3 degrees (their
setting) or less.
The program then updates both antennas every 3 seconds or whenever the
azimuth or elevation changed by fix 3 or more degrees. Then It positons
the antennas a half step in front of the current satellite position.
So, the satellite will run through the "focus" of the antenna.
There is a sub option of b. (which they used): "gain releated". When
the elevation increases the azimuth position of the satellite changes
very quickly and the azimuth antenna positon will be updated very
often. On the other hand the horizontal opening angle of the antenna
becomes virtually wider, following a cosine function (at 90 degs
elevation azimuth is meaningless). The feature utilizes this effect to
reduce the number of horizontal updates without loss of gain. Also, the
signal is stronger at high elevation angles, due to the smaller distance
of the satellite. So, with a small update step they should not loose
data, even with the setting "gain related".
That all is described in the manual (menus "Rotor" and "Rotor Setup").
73s, Erich, DK1TB
Am 01.07.2016 um 03:55 schrieb Jim White:
> I was at a university ground station today and noted their antennas
> were not keeping up with their satellite on a high elevation pass.
> They are using SatPC32 with the G5500 rotor. They have the dead band
> set to 3 degrees. Since they are using a pair of long UHF Yagis for a
> total of 21dB gain there were some lost packets for about 2 minutes or
> so around TCA. Their sat was deployed from the ISS so is currently at
> about 400km altitude which means it's zipping by rather quickly when
> the elevation is above about 75 degrees or so.
>
> In the past I've used tracking programs that allowed a 'lead'
> setting. That is, you could tell the software to lead the satellite
> by a few seconds. That did a pretty good job keeping the sat in the
> beam width when the AZ was changing quickly. I'm not finding that
> setting in SatPC32. Is there one, or another setting to accomplish
> the same thing?
>
> Jim
> _______________________________________________
> Sent viaAMSAT -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: 4
Date: Fri, 01 Jul 2016 07:10:30 -0400
From: skristof@xxxxxxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] AO-85 9k6 data
Message-ID: <7327394294ab4ca09325ade338eabc0f@xxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII
I'm getting the hang of grabbing the AO-85 DUV data stream, but still
haven't caught any 9k6 data.
Can I get a quick refresher on when the 9k6 data is transmitted, please?
I assume that FoxTelem set to "Auto" mode will pick it up when it
happens, but please correct me on that if I'm wrong there also.
Pointing me towards on informational url would be fine, but personal
messages are lovely.
Steve AI9IN
------------------------------
Message: 5
Date: Fri, 1 Jul 2016 08:51:54 -0400
From: rsoifer1@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Mode K
Message-ID: <155a683f87f-2773-7aaf@xxxxxxxxxx.xxxx.xxx.xxx>
Content-Type: text/plain; charset=utf-8
The late John Branegan, GM4IHJ (CDR, Royal Navy) did a lot of good research
on Mode K using the RS birds. It can be an effective way of working
satellite DX despite today's low orbits.
73 Ray W2RS
------------------------------
Message: 6
Date: Fri, 1 Jul 2016 07:03:35 -0600
From: Jim White <jim@xxxxxxxxxxxxxxxxx.xxx>
To: Erich Eichmann <erich.eichmann@xxxxxxxx.xx>, AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] SatPC32 leading the satellite
Message-ID: <57766A27.3040303@xxxxxxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Thanks Erich,
Jim
On 7/1/2016 12:28 AM, Erich Eichmann wrote:
> There are the following options in menu "Rotor Setup" they could have
> used to update the azimuth and elevation antenna positions:
> a. in time increments, say 3 seconds or less.
> b. when the satellite's position (azimuth or elevation) changed by a
> certain CONSTANT amount of degrees (dead band), say 3 degrees (their
> setting) or less.
> The program then updates both antennas every 3 seconds or whenever the
> azimuth or elevation changed by fix 3 or more degrees. Then It
> positons the antennas a half step in front of the current satellite
> position. So, the satellite will run through the "focus" of the antenna.
>
> There is a sub option of b. (which they used): "gain releated". When
> the elevation increases the azimuth position of the satellite changes
> very quickly and the azimuth antenna positon will be updated very
> often. On the other hand the horizontal opening angle of the antenna
> becomes virtually wider, following a cosine function (at 90 degs
> elevation azimuth is meaningless). The feature utilizes this effect
> to reduce the number of horizontal updates without loss of gain. Also,
> the signal is stronger at high elevation angles, due to the smaller
> distance of the satellite. So, with a small update step they should
> not loose data, even with the setting "gain related".
> That all is described in the manual (menus "Rotor" and "Rotor Setup").
>
> 73s, Erich, DK1TB
>
>
>
> Am 01.07.2016 um 03:55 schrieb Jim White:
>> I was at a university ground station today and noted their antennas
>> were not keeping up with their satellite on a high elevation pass.
>> They are using SatPC32 with the G5500 rotor. They have the dead band
>> set to 3 degrees. Since they are using a pair of long UHF Yagis for a
>> total of 21dB gain there were some lost packets for about 2 minutes
>> or so around TCA. Their sat was deployed from the ISS so is
>> currently at about 400km altitude which means it's zipping by rather
>> quickly when the elevation is above about 75 degrees or so.
>>
>> In the past I've used tracking programs that allowed a 'lead'
>> setting. That is, you could tell the software to lead the satellite
>> by a few seconds. That did a pretty good job keeping the sat in the
>> beam width when the AZ was changing quickly. I'm not finding that
>> setting in SatPC32. Is there one, or another setting to accomplish
>> the same thing?
>>
>> Jim
>> _______________________________________________
>> Sent viaAMSAT -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: 7
Date: Fri, 1 Jul 2016 09:15:46 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Mode K (fact and fiction?)
Message-ID: <a12878e987395d0660e18d2191da0ec1@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
> The late John Branegan, GM4IHJ (CDR, Royal Navy)
> did a lot of good research on Mode K using the RS birds.
> ... an effective way of... satellite DX despite today's low orbits.
Thanks! Ill research it. The over the horizon DX aspect is what everyone
remembers.
And that is what I want to study. My theory is that with the variability
of the ionosphere, that just as much as there is enhanced
beyond-the-horizon relay some times, there is also times of no-path
because the ionosphere at low elevations is bending the path away from the
bird.
My theory is that hams like DX and remember the GOOD DX, but then
conveniently forget all the times when the link was dead. So I think
what I hear from "the good ole days" has to be taken with a grain of salt
since the dead band days are not as memorable as that rare double bounce
hop to timbuktoo.
So far, no one has described how often they could not even hear the bird
or get into it even though it was in range. I think that is the data that
is missing?
Bob, WB4APR
HFSAT in 2018?
------------------------------
Message: 8
Date: Fri, 1 Jul 2016 08:49:04 -0500
From: Alan <wa4sca@xxxxx.xxx>
To: <skristof@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 9k6 data
Message-ID: <000001d1d39f$55345990$ff9d0cb0$@xxxxx.xxx>
Steve,
9k6 data is not used very much on AO-85 since it is not required for any of
the experiments, and its
use turns off the repeater. It is turned on, rarely and briefly, for
testing or other purposes.
There is usually an announcement on Twitter, Facebook and/or here in
advance, though not always if
they are doing a quick look. The Auto mode will pick it up, assuming
everything else is working
correctly at your station. It has been reported that the signal threshold
to copy 9k6 is somewhat
higher than for DUV.
Expect to see much more when Fox-1Cliff and Fox-1D fly.
73s,
Alan
WA4SCA
<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
skristof@xxxxxxx.xxx
<Sent: Friday, July 01, 2016 6:11 AM
<To: amsat-bb@xxxxx.xxx
<Subject: [amsat-bb] AO-85 9k6 data
<
<I'm getting the hang of grabbing the AO-85 DUV data stream, but still
<haven't caught any 9k6 data.
<
<Can I get a quick refresher on when the 9k6 data is transmitted, please?
<I assume that FoxTelem set to "Auto" mode will pick it up when it
<happens, but please correct me on that if I'm wrong there also.
<
<Pointing me towards on informational url would be fine, but personal
<messages are lovely.
<
<Steve AI9IN
<_______________________________________________
<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: 9
Date: Fri, 1 Jul 2016 09:58:24 -0400
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 9k6 data
Message-ID: <F777B63FAC624E469D68FBC1CABF860C@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Do I recall correctly that in order to receive the higher data rate, a wider
RF and/or audio bandwidth might be required?
I often have the audio bandwidth narrowed a bit (high end only) to better
hear the voice traffic, which of course has no effect on the DUV as long as
the low end of the audio filter is left at zero. Ditto on the RF bandwidth
if it makes the voices easier to copy on a given pass.
-Scott, K4KDR
Montpelier, VA USA
------------------------------------------------------------------------------
--
-----Original Message-----
From: Alan
Sent: Friday, July 01, 2016 9:49 AM
To: skristof@xxxxxxx.xxx ; amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-85 9k6 data
Steve,
9k6 data is not used very much on AO-85 since it is not required for any of
the experiments, and its
use turns off the repeater. It is turned on, rarely and briefly, for
testing or other purposes.
There is usually an announcement on Twitter, Facebook and/or here in
advance, though not always if
they are doing a quick look. The Auto mode will pick it up, assuming
everything else is working
correctly at your station. It has been reported that the signal threshold
to copy 9k6 is somewhat
higher than for DUV.
Expect to see much more when Fox-1Cliff and Fox-1D fly.
73s,
Alan
WA4SCA
<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
skristof@xxxxxxx.xxx
<Sent: Friday, July 01, 2016 6:11 AM
<To: amsat-bb@xxxxx.xxx
<Subject: [amsat-bb] AO-85 9k6 data
<
<I'm getting the hang of grabbing the AO-85 DUV data stream, but still
<haven't caught any 9k6 data.
<
<Can I get a quick refresher on when the 9k6 data is transmitted, please?
<I assume that FoxTelem set to "Auto" mode will pick it up when it
<happens, but please correct me on that if I'm wrong there also.
<
<Pointing me towards on informational url would be fine, but personal
<messages are lovely.
<
<Steve AI9IN
------------------------------
Message: 10
Date: Fri, 1 Jul 2016 10:01:09 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: Scott <scott23192@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-85 9k6 data
Message-ID: <B2368DD7-7DEB-4E6C-AB8F-9ED2EEC125B7@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Correct. I find 12-15 kHz works best on the AO-85 9k6 data with SDR#.
73, Drew KO4MA
> On Jul 1, 2016, at 9:58 AM, Scott <scott23192@xxxxx.xxx> wrote:
>
> Do I recall correctly that in order to receive the higher data rate, a
wider RF and/or audio bandwidth might be required?
>
> I often have the audio bandwidth narrowed a bit (high end only) to better
hear the voice traffic, which of course has no effect on the DUV as long as
the low end of the audio filter is left at zero. Ditto on the RF bandwidth
if it makes the voices easier to copy on a given pass.
>
> -Scott, K4KDR
> Montpelier, VA USA
>
>
>
------------------------------------------------------------------------------
--
>
> -----Original Message----- From: Alan
> Sent: Friday, July 01, 2016 9:49 AM
> To: skristof@xxxxxxx.xxx ; amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] AO-85 9k6 data
>
> Steve,
>
> 9k6 data is not used very much on AO-85 since it is not required for any
of the experiments, and its
> use turns off the repeater. It is turned on, rarely and briefly, for
testing or other purposes.
> There is usually an announcement on Twitter, Facebook and/or here in
advance, though not always if
> they are doing a quick look. The Auto mode will pick it up, assuming
everything else is working
> correctly at your station. It has been reported that the signal threshold
to copy 9k6 is somewhat
> higher than for DUV.
>
> Expect to see much more when Fox-1Cliff and Fox-1D fly.
>
> 73s,
>
> Alan
> WA4SCA
>
>
>
>
> <-----Original Message-----
> <From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
skristof@xxxxxxx.xxx
> <Sent: Friday, July 01, 2016 6:11 AM
> <To: amsat-bb@xxxxx.xxx
> <Subject: [amsat-bb] AO-85 9k6 data
> <
> <I'm getting the hang of grabbing the AO-85 DUV data stream, but still
> <haven't caught any 9k6 data.
> <
> <Can I get a quick refresher on when the 9k6 data is transmitted, please?
> <I assume that FoxTelem set to "Auto" mode will pick it up when it
> <happens, but please correct me on that if I'm wrong there also.
> <
> <Pointing me towards on informational url would be fine, but personal
> <messages are lovely.
> <
> <Steve AI9IN
> _______________________________________________
> 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: 11
Date: Fri, 01 Jul 2016 10:24:48 -0400
From: "skristof@xxxxxxx.xxxx <skristof@xxxxxxx.xxx>
To: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>, Scott
<scott23192@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-85 9k6 data
Message-ID: <bneclnbbcull4xqn3r3bwwqm.1467383088927@xxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
I use HD sdr with an rtl-sdr to get data from ao-85. I usually set the audio
filter at about 500 hz since I'm just collecting data. Sounds like I'll need
to open that up for any 9k6 data. Thanks for the ?replies!Steve AI9IN
Sent from my Verizon Wireless 4G LTE smartphone-------- Original message
--------From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx> Date: 7/1/2016
10:01 AM (GMT-05:00) To: Scott <scott23192@xxxxx.xxx> Cc:
amsat-bb@xxxxx.xxx Subject: Re: [amsat-bb] AO-85 9k6 data
Correct. I find 12-15 kHz works best on the AO-85 9k6 data with SDR#.
73, Drew KO4MA
> On Jul 1, 2016, at 9:58 AM, Scott <scott23192@xxxxx.xxx> wrote:
>
> Do I recall correctly that in order to receive the higher data rate, a
wider RF and/or audio bandwidth might be required?
>
> I often have the audio bandwidth narrowed a bit (high end only) to better
hear the voice traffic, which of course has no effect on the DUV as long as
the low end of the audio filter is left at zero.? Ditto on the RF bandwidth
if it makes the voices easier to copy on a given pass.
>
> -Scott,? K4KDR
> Montpelier, VA? USA
>
>
>
------------------------------------------------------------------------------
--
>
> -----Original Message----- From: Alan
> Sent: Friday, July 01, 2016 9:49 AM
> To: skristof@xxxxxxx.xxx ; amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] AO-85 9k6 data
>
> Steve,
>
> 9k6 data is not used very much on AO-85 since it is not required for any
of the experiments, and its
> use turns off the repeater.? It is turned on, rarely and briefly, for
testing or other purposes.
> There is usually an announcement on Twitter, Facebook and/or here in
advance, though not always if
> they are doing a quick look.? The Auto mode will pick it up, assuming
everything else is working
> correctly at your station.? It has been reported that the signal threshold
to copy 9k6 is somewhat
> higher than for DUV.
>
> Expect to see much more when Fox-1Cliff and Fox-1D fly.
>
> 73s,
>
> Alan
> WA4SCA
>
>
>
>
> <-----Original Message-----
> <From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
skristof@xxxxxxx.xxx
> <Sent: Friday, July 01, 2016 6:11 AM
> <To: amsat-bb@xxxxx.xxx
> <Subject: [amsat-bb] AO-85 9k6 data
> <
> <I'm getting the hang of grabbing the AO-85 DUV data stream, but still
> <haven't caught any 9k6 data.
> <
> <Can I get a quick refresher on when the 9k6 data is transmitted, please?
> <I assume that FoxTelem set to "Auto" mode will pick it up when it
> <happens, but please correct me on that if I'm wrong there also.
> <
> <Pointing me towards on informational url would be fine, but personal
> <messages are lovely.
> <
> <Steve AI9IN
> _______________________________________________
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expressed
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_______________________________________________
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
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------------------------------
Message: 12
Date: Fri, 1 Jul 2016 10:30:32 -0400
From: RSoifer1@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Mode K (fact and fiction?)
Message-ID: <77eaf.588aad14.44a7d888@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Bob,
John wrote up many of his findings in his Space Radio Handbook, published
by RSGB in 1991. If you can't locate a copy, let me know and I can send
you mine.
73 Ray
------------------------------
Subject: Digest Footer
_______________________________________________
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 member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 11, Issue 217
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