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CX2SA > SATDIG 13.03.11 17:47l 845 Lines 28508 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Is it 100% impossible to work a satellite below
thehorizon? (Gregg Wonderly)
2. ISS Digipeaer over Japan (Bob Bruninga )
3. Re: 1 Year on the birds (saguaroastro@xxx.xxxx
4. Scottsdale AZ hamfest - report (Patrick STODDARD (WD9EWK/VA7EWK))
5. FT-8800R new toy (Bob- W7LRD)
6. Want to see the ND9M/MM QTH? (Patrick STODDARD (WD9EWK/VA7EWK))
7. ND9M/MM Op Sked: DM02 - 13 March (Clary, James T, Civilian)
8. Anyone using PacsatTools for Linux? (Eric Christensen)
9. Re: ISS Digipeaer over Japan (Greg D.)
10. Re: Scottsdale AZ hamfest - report (Gould Smith)
11. emailing Amsat (zach hillerson)
12. Re: emailing Amsat (Alan P. Biddle)
13. Re: Is it 100% impossible to work a satellite below
thehorizon? (na2x@xxxxx.xxxx
14. Re: Is it 100% impossible to work a satellite below
thehorizon? (Gary "Joe" Mayfield)
15. Re: Is it 100% impossible to work a satellite below
thehorizon? (K5OE)
16. Re: ISS Digipeaer over Japan (Bob Bruninga )
17. Re: AMSAT-BB Digest, Vol 6, Issue 151 (Louis House, KD5GM)
----------------------------------------------------------------------
Message: 1
Date: Sat, 12 Mar 2011 22:38:19 -0600
From: Gregg Wonderly <w5ggw@xxx.xxx>
Subject: [amsat-bb] Re: Is it 100% impossible to work a satellite
below thehorizon?
To: John Geiger <aa5jg@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx Bill Dzurilla <billdz.geo@xxxxx.xxx>
Message-ID: <4D7C4A3B.4040300@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
When the RF signal leaves the duct, it doesn't disappear. It keeps
radiating in
the direction that it was going, and can successfully reach any altitude
appropriate for that line of propagation. The hard part, is then getting the
return path (the downlink freq) to propagate with the same characteristics so
that you can actually hear it. But, it is not impossible at all...
Gregg Wonderly
W5GGW
On 3/12/2011 6:53 PM, John Geiger wrote:
> It might have happened before on some of the Mode K satellites, due to F2,
> but not sure if the other modes would work below the horizon, as getting the
> conditions right on both bands would be pretty tough. Tropo wouldn't get
> high enough into the air to get into the satellite. Has anyone heard AO7 in
> mode A when it is below your horizon due to F2 skip extending your range of
> the satelllite?
>
> 73s John AA5JG
> ----- Original Message -----
> From: "Bill Dzurilla"<billdz.geo@xxxxx.xxx>
> To:<amsat-bb@xxxxx.xxx>
> Sent: Sunday, March 13, 2011 12:25 AM
> Subject: [amsat-bb] Is it 100% impossible to work a satellite below
> thehorizon?
>
>
>> I was giving a presentation at our club meeting called Working DX on the
>> Satellites and afterwards someone had a good question: is it at all
>> possible that tropo, skip, or other form of enhanced propagation can enable
>> a contact via a satellite below the horizon?
>>
>> It has never happened to me. Has it ever happened?
>>
>> 73, Bill NZ5N
>>
>>
>>
>> _______________________________________________
>> 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
>
> _______________________________________________
> 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: 2
Date: Sun, 13 Mar 2011 00:10:42 -0500 (EST)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
Subject: [amsat-bb] ISS Digipeaer over Japan
To: amsat-bb@xxxxx.xxx
Message-ID: <20110313001042.AHV52783@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>> Hi, My name is toyo (JG2RZF).
>> As you know, pacific side of some of North-East
>> region (JA7) of Japan is still power outage
>> And we cannot see the APRS mobile in this area
>> because of no IGATE activity.
>> For example, we cannot see the trace of Wakayama
>> Red Cross (JA3FRI-12) now.
>>
>> Can we use satellite digi for this purpose?
We have advised Toyo san that ARISS APRS digipeater can be used over Japan
for this purpose. Any APRS operators in the affected area can switch to ISS
digipeater by simply changing frequency to 145.825. ISS is coming over
Japan about 6 times a day in the afternoon.
The terrestrial path VIA WIDE?-? should work fine. But is better to change
path to VIA ARISS so that the packets will be marked as having been
digipeated by RS0ISS-4 each time.
We hope Astronauts can be sure to keep APRS digipeater operating over Japan
on 145.825.
We hope that stations NOT in the disaster area can monitor the ISS downlink
for emergency traffic and can IGATE the downlink into the APRS Internet
System.
Bob, WB4APR
------------------------------
Message: 3
Date: Sun, 13 Mar 2011 0:38:53 -0500
From: <saguaroastro@xxx.xxx>
Subject: [amsat-bb] Re: 1 Year on the birds
To: Michael Elliott <k4moa@xxxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <20110313003853.724BD.35551.imail@xxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
Michael,
First congratulation on 1 year on the birds. Coming on 6 months for me.
Funny thing, you mention your wife asking if you contacted any aliens yet,
My daughter & her BFF do the same thing.
There was the one time I was working AO-27 from the front of the house. My
next door neighbor came out and asked me what I was doing. I told him I was
trying to contact the mother ship. Not quite sure what he thought of that!
73 De Rick
K7TEJ
---- Michael Elliott <k4moa@xxxxxxxx.xxx> wrote:
> Hello everyone on the board,
> My wife still says I am strange for walking around in the yard with a
> antenna and will ask from time to time if I contacted any aliens. If there
> is any comfort in that, it is at least starting to get warm here in NC.
> Along the same lines, I have co-workers who ask if I have found the tagged
> wildlife yet. Luckily I have friends who understand...
------------------------------
Message: 4
Date: Sat, 12 Mar 2011 21:41:01 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Scottsdale AZ hamfest - report
To: amsat-bb@xxxxx.xxx
Message-ID: <91926.50503.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Thanks to all the stations across the USA and Mexico for the 18
contacts during 6 different passes while I was at the Scottsdale
(Arizona) Spring Hamfest. Two passes each, on 3 different
satellites (AO-7, SO-50, VO-52), during the half-day hamfest.
Lots of people stopped by my AMSAT table, and - as I've seen at
other hamfests - larger crowds showing up for the SSB satellite
demonstrations. Weather was perfect, and I was able to stand
outside without a jacket from about 0600 local (1300 UTC), before
sunrise.
Toward the end of the morning, I was answering lots of questions
about my two FT-817NDs and SSB satellite operating. Many have
seen demonstrations of FM satellite operating, or seen the many
videos online, but not too many see SSB satellite operating.
Several commented that they could put together a station with a
larger multiband all-mode transceiver like an FT-857 or IC-706
with an FT-817 as a receiver. The hamfest wrapped up around 1900
UTC, but I was standing and talking with people for at least a
full hour past the official end of the hamfest. A good thing!
Also, thanks to the Scottsdale Amateur Radio Club for a great
event at a new location, and for providing AMSAT with a space
at the hamfest. This new location, at a church, had lots of
covered parking used for vendors and others representing clubs
or organizations. I was directed to a couple of spaces in the
covered parking area, which was ideal for everyone except me.
Pointing my log periodic through the cover was not going to be
a good thing, and I was able to get a couple of uncovered parking
spaces for my truck and table before the hamfest got under way.
The past couple of days have been very busy, with my quick road
trip to the San Diego area followed by this hamfest closer to
home. Other than trying to work ND9M tomorrow :-) I don't plan
on doing too much. One relatively quiet day out of a 4-day
weekend is a good thing. The next hamfest I will attend with an
AMSAT table will be in Tucson two weeks from now, on Saturday
26 March.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 5
Date: Sun, 13 Mar 2011 05:44:28 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] FT-8800R new toy
To: amsat-bb@xxxxx.xxx
Message-ID:
<174654504.2396800.1299995068226.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Not wanting to reinvent the wheel.? Anyone using the FT-8800R mobile for
satellites have any hints or sugestions, antennas etc.? Email direct-thanks.
73 Bob W7LRD
Seattle
------------------------------
Message: 6
Date: Sat, 12 Mar 2011 21:58:48 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Want to see the ND9M/MM QTH?
To: amsat-bb@xxxxx.xxx
Message-ID: <48798.78218.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
While I was just in California recently, I drove to Oceanside -
along the coast north of San Diego, next to the huge Marine Corps
Base Camp Pendleton. I was hoping to see the USNS Sgt. William
R. Button, the ship Jim ND9M has been on and operating from
lately. After some driving around, I was able to see his ship
offshore on Friday morning before I left the San Diego area.
I had seen photos of the ship on the Internet, so I had an idea
what to look for.
After seeing an e-mail from ND9M on Friday, I considered myself
lucky to see his ship. It had gone out to deeper water, in advance
of the tsunami from the recent earthquake in Japan. It had come
back to its anchorage by the time I went out there. I was able
to see the ship, and took several photos of it in the 1800-1900
UTC (1000-1100 local time) hour. I posted a couple of those
photos at:
http://www.qsl.net/wd9ewk/pics/nd9m/
The first photo was taken at the north end of Oceanside Harbor,
very close to Camp Pendleton. The second photo was taken about
1/2 mile (almost 1km) south of that location, on the beach. The
helicopter deck on the rear of the ship was visible, which is
where Jim has been operating from. These two photos are at a
lower resolution than the original 7-megapixel photos, so they
don't take much time to download. If anyone wants to see the
originals, please e-mail me directly and I'll send them to you.
More information about Jim's ship is available at (among other
places):
http://www.msc.navy.mil/inventory/ships.asp?ship=21
http://en.wikipedia.org/wiki/Maritime_Prepositioning_ship#2nd_Lieutenant_John_
P._Bobo_Class
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 7
Date: Sun, 13 Mar 2011 06:30:06 -0000
From: "Clary, James T, Civilian" <James.T.Clary.civ@xxx.xxxx.xxx>
Subject: [amsat-bb] ND9M/MM Op Sked: DM02 - 13 March
To: <amsat-bb@xxxxx.xxx>
Message-ID:
<91BA9771DE57884FBCD59E08A62C65A8881D96@xxxxxxxxxxxx.xxxxxxxx.xxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
We're apparently going to depart the Oceanside, CA area a bit later than
originally planned, so we'll likely be in DM02 from about 1730-2130Z.
That would swing a second AO27 pass into the spotlight for that grid.
I'll try to be on during VO52's pass starting at 13/1712Z, but we'll
probably still be in DM13 or possibly DM03.
73,
Jim, ND9M / VQ9JC
------------------------------
Message: 8
Date: Sat, 12 Mar 2011 18:28:13 -0500
From: Eric Christensen <eric@xxxxxxxxxxxxxxxx.xx>
Subject: [amsat-bb] Anyone using PacsatTools for Linux?
To: amsat-bb@xxxxx.xxx
Message-ID: <1299972493.26323.134.camel@xxxxxxxxx.xxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
Anyone using PacsatTools for Linux? I just installed the software but
can't quite figure out what's going on with it. Thanks.
73,
Eric W4OTN
------------------------------
Message: 9
Date: Sat, 12 Mar 2011 23:01:41 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: ISS Digipeaer over Japan
To: <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <BLU133-W13DEFA73585BC1B95177F0A9CD0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Is there someone who can get this message to the ISS Crew through official
channels? I see that there are several school contacts coming up next week,
and the crew often gets chatty with the ground afterwards. Under normal
circumstances that's really appreciated, but this isn't the case, and I
worry that the crew might not consider that their system is part of the
relief effort unless notified.
Greg KO6TH
> From: bruninga@xxxx.xxx
> To: amsat-bb@xxxxx.xxx
> Date: Sun, 13 Mar 2011 00:10:42 -0500
> Subject: [amsat-bb] ISS Digipeaer over Japan
>
> >> Hi, My name is toyo (JG2RZF).
> >> As you know, pacific side of some of North-East
> >> region (JA7) of Japan is still power outage
> >> And we cannot see the APRS mobile in this area
> >> because of no IGATE activity.
> >> For example, we cannot see the trace of Wakayama
> >> Red Cross (JA3FRI-12) now.
> >>
> >> Can we use satellite digi for this purpose?
>
>
> We have advised Toyo san that ARISS APRS digipeater can be used over Japan
for this purpose. Any APRS operators in the affected area can switch to ISS
digipeater by simply changing frequency to 145.825. ISS is coming over
Japan about 6 times a day in the afternoon.
>
> The terrestrial path VIA WIDE?-? should work fine. But is better to
change path to VIA ARISS so that the packets will be marked as having been
digipeated by RS0ISS-4 each time.
>
> We hope Astronauts can be sure to keep APRS digipeater operating over
Japan on 145.825.
>
> We hope that stations NOT in the disaster area can monitor the ISS
downlink for emergency traffic and can IGATE the downlink into the APRS
Internet System.
>
> Bob, WB4APR
> _______________________________________________
> 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: 10
Date: Sun, 13 Mar 2011 03:03:09 -0400
From: "Gould Smith" <gouldsmi@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Scottsdale AZ hamfest - report
To: <amsat-bb@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <2D71A22D2608413EBE10DCF4F8FC29AF@xxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Patrick,
Thank you for the report and all the great work you do promoting satellite
operation for AMSAT.
73,
Gould, WA4SXM
----- Original Message -----
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, March 13, 2011 1:41 AM
Subject: [amsat-bb] Scottsdale AZ hamfest - report
> Hi!
>
> Thanks to all the stations across the USA and Mexico for the 18
> contacts during 6 different passes while I was at the Scottsdale
> (Arizona) Spring Hamfest. Two passes each, on 3 different
> satellites (AO-7, SO-50, VO-52), during the half-day hamfest.
> Lots of people stopped by my AMSAT table, and - as I've seen at
> other hamfests - larger crowds showing up for the SSB satellite
> demonstrations. Weather was perfect, and I was able to stand
> outside without a jacket from about 0600 local (1300 UTC), before
> sunrise.
>
> Toward the end of the morning, I was answering lots of questions
> about my two FT-817NDs and SSB satellite operating. Many have
> seen demonstrations of FM satellite operating, or seen the many
> videos online, but not too many see SSB satellite operating.
> Several commented that they could put together a station with a
> larger multiband all-mode transceiver like an FT-857 or IC-706
> with an FT-817 as a receiver. The hamfest wrapped up around 1900
> UTC, but I was standing and talking with people for at least a
> full hour past the official end of the hamfest. A good thing!
>
> Also, thanks to the Scottsdale Amateur Radio Club for a great
> event at a new location, and for providing AMSAT with a space
> at the hamfest. This new location, at a church, had lots of
> covered parking used for vendors and others representing clubs
> or organizations. I was directed to a couple of spaces in the
> covered parking area, which was ideal for everyone except me.
> Pointing my log periodic through the cover was not going to be
> a good thing, and I was able to get a couple of uncovered parking
> spaces for my truck and table before the hamfest got under way.
>
> The past couple of days have been very busy, with my quick road
> trip to the San Diego area followed by this hamfest closer to
> home. Other than trying to work ND9M tomorrow :-) I don't plan
> on doing too much. One relatively quiet day out of a 4-day
> weekend is a good thing. The next hamfest I will attend with an
> AMSAT table will be in Tucson two weeks from now, on Saturday
> 26 March.
>
> 73!
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
>
>
> _______________________________________________
> 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: 11
Date: Sun, 13 Mar 2011 06:22:11 -0700 (PDT)
From: zach hillerson <qstick333@xxxxx.xxx>
Subject: [amsat-bb] emailing Amsat
To: amsat-bb@xxxxx.xxx
Message-ID: <962290.39333.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Does anyone know the email address to send correspondence to Amsat?? When I
try using the form on their site it tells me their is an error......?
------------------------------
Message: 12
Date: Sun, 13 Mar 2011 09:05:48 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: emailing Amsat
To: "'zach hillerson'" <qstick333@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <D9F92983191D435E9A68C7EB06A5AFC8@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Zach,
Call??
Send it to MARTHA@xxxxx.xxx
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of zach hillerson
Sent: Sunday, March 13, 2011 8:22 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] emailing Amsat
Does anyone know the email address to send correspondence to Amsat?? When I
try using the form on their site it tells me their is an error......?
_______________________________________________
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: 13
Date: Sun, 13 Mar 2011 07:13:13 -0700 (PDT)
From: <na2x@xxxxx.xxx>
Subject: [amsat-bb] Re: Is it 100% impossible to work a satellite
below thehorizon?
To: amsat-bb@xxxxx.xxx
Message-ID: <787974.17095.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
On 3/12/2011 7:25 PM, Bill Dzurilla wrote:
> I was giving a presentation at our club meeting called Working
> DX on the Satellites and afterwards someone had a good
> question: is it at all possible that tropo, skip, or other
> form of enhanced propagation can enable a contact via a
> satellite below the horizon?
>
> It has never happened to me. Has it ever happened?
>
>
My memory might be a little fuzzy here. There was an article in the AMSAT
Journal back in the early 90's where G3IOR described his contact from the UK
into VK/ZL using RS-12. As others have mentioned in this thread, RS-12
using 15 and 10 meters for uplink and downlink, below the horizon contacts
were possible. I was able to work KH6 that way from New York. I also worked
many European countries out of normal expected range.
I seriously doubt that satellites using 2 meters and higher frequencies for
uplink/downlink would show much (if any) below the horizon capability.
Bob NA2X
AMSAT LM #51 since 1974
------------------------------
Message: 14
Date: Sun, 13 Mar 2011 09:29:56 -0500
From: "Gary \"Joe\" Mayfield" <gary_mayfield@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Is it 100% impossible to work a satellite
below thehorizon?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <COL114-DS16278ACD18A85CCBB863D48ACD0@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I have heard satellite paths extended by Aurora many times. It has very
distinctive sound.
73,
Joe kk0sd
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of na2x@xxxxx.xxx
Sent: Sunday, March 13, 2011 9:13 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Is it 100% impossible to work a satellite below
thehorizon?
On 3/12/2011 7:25 PM, Bill Dzurilla wrote:
> I was giving a presentation at our club meeting called Working
> DX on the Satellites and afterwards someone had a good
> question: is it at all possible that tropo, skip, or other
> form of enhanced propagation can enable a contact via a
> satellite below the horizon?
>
> It has never happened to me. Has it ever happened?
>
>
My memory might be a little fuzzy here. There was an article in the AMSAT
Journal back in the early 90's where G3IOR described his contact from the UK
into VK/ZL using RS-12. As others have mentioned in this thread, RS-12
using 15 and 10 meters for uplink and downlink, below the horizon contacts
were possible. I was able to work KH6 that way from New York. I also worked
many European countries out of normal expected range.
I seriously doubt that satellites using 2 meters and higher frequencies for
uplink/downlink would show much (if any) below the horizon capability.
Bob NA2X
AMSAT LM #51 since 1974
_______________________________________________
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: 15
Date: Sun, 13 Mar 2011 10:31:37 -0400 (EDT)
From: K5OE <k5oe@xxx.xxx>
Subject: [amsat-bb] Re: Is it 100% impossible to work a satellite
below thehorizon?
To: amsat-bb@xxxxx.xxx
Message-ID: <8CDAFA27EEC2986-588-57BB1@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Drew,
I believe your reference was to N4ZC.
There are some old (2002) posts on amsat-bb about his exploits:
http://www.amsat.org/amsat/archive/amsat-bb/200203/msg00005.html
http://www.amsat.org/amsat/archive/amsat-bb/200202/msg00708.html
http://www.amsat.org/amsat/archive/amsat-bb/200202/msg00712.html
73,
Jerry, K5OE
On 3/12/2011 7:25 PM, Bill Dzurilla wrote:
> I was giving a presentation at our club meeting called Working DX on the
>Satellites and afterwards someone had a good question: is it at all possible
>that tropo, skip, or other form of enhanced propagation can enable a contact
>via a satellite below the horizon?
>
> It has never happened to me. Has it ever happened?
>
>
It was relatively commonplace with RS-12 on Mode K, 15m up, 10m down.
There was one guy in North Carolina I think that worked dxcc on
RS-12/13. He was my first satellite QSO in 1992 or so, and was always
on. I can't remember the call, but it was a 1x2 I think.
I imagine it would be at least possible on other birds and higher bands
with strong tropo. Jerry, KK5YY told me about doing that on AO-27 or
UO-14 from Alaska over the ocean. I've not experienced it though.
73, Drew KO4MA
------------------------------
Message: 16
Date: Sun, 13 Mar 2011 11:28:39 -0400 (EDT)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: ISS Digipeaer over Japan
To: amsat-bb@xxxxx.xxx
Message-ID: <20110313112839.AHV56738@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Toyo san,
A few more ideas. It is easy to manually estimate ISS pass times every day
once you have heard a pass.
See: http://aprs.org/MobileLEOtracking.html
1) ISS over Japan today is between about 0830 to 1830 JST.
2) When you hear the first pass, then you will have additional passes every
91 minutes or so that day.
3) Each day a given GOOD pass is 23 minutes later.
4) But overall-long-term pattern is moving earlier every other day by 51
minutes.
5) So in one week from now, the time window will be 0600 to 1600
6) The pass pattern is about the same. First 2 passes peak to the SE, then
NW. Then a low northern pass, then the last two passes are NE and then SW.
You can get EXACT pass times from http://heavens-above.com and select a
city. However, this web page does not show the 1 or 2 low passes each day
below 10 degrees elevation.
The problem with using the ISS digipeater is that the survivors in the
devistated area do not know the frequency (145.825). One way to solve this
is to look for opportunity for someone to take a portable digipeater on an
airplane over devistated area. The new TH-D72 HT can digipeat now! So have
someone with a D72 catch a ride in an aircraft one day.
The D72 can BEACON on 144.64 a MESSAGE BULLETIN with info about the ISS
digipeater and the time-window. WHile it is aloft, it can also act as a
digipeater on Japanese APRS channel 144.64 and can also capture a list of
any APRS stations or mobiles on the air.
The short bulletins might say something like this:
TO: BLN1
MSG: ISS Digi on 145.825 between 0830 to 1830
TO: BLN2
MSG: Passes are 6 min long every 91 minutes
TO: BLN3
MSG: Every day, passes are 23 minutes later
TO: BLN4
MSG: Time window moves EARLIER 51m every 2 days
Keep bulletins to under 45 characters to make sure that every radio display
can see the full bulletin (D7 screen limit).
But in small area like Japan, I think it might be easier just to try to
drive APRS mobiles (acting as digipeaters) to nearby hill tops on 144.64
normal APRS Japanese Frequency and keep everyone on same frequency without
confusion.
Bob, WB4APR
------------------------------
Message: 17
Date: Sun, 13 Mar 2011 10:42:22 -0500
From: "Louis House, KD5GM" <kd5gm@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 6, Issue 151
To: <amsat-bb@xxxxx.xxx>
Message-ID: <DDF9A9730E9A48C68B9886D6CCCBB00D@xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
----- Original Message -----
From: <amsat-bb-request@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, March 12, 2011 10:56 PM
Subject: AMSAT-BB Digest, Vol 6, Issue 151
LOUIS, KD5GM in EL29kq
Bill,
I have on several occasions, while I am listening to my own signals (in CW)
on the SAT's AO-07, FO-29 and VO-52, when they are LOS to the North of the
US and have copied the signals down to -6 degrees on nights that there have
Aurora alerts posted from several reflectors that I subscribe to. Most of
the time my Northern LOS for these birds is 1 to 2 degrees when there are no
alerts. Certainly no expert on this phenomenon, but I believe that the
signals are enhanced beyond the normal range during the enhancement
conditions.
73, Louis
CW, The original digital mode
AMSAT #37061: FIST #3606
> ----- Original Message -----
> From: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Sunday, March 13, 2011 12:25 AM
> Subject: [amsat-bb] Is it 100% impossible to work a satellite below
> thehorizon?
>
>
>>I was giving a presentation at our club meeting called Working DX on the
>>Satellites and afterwards someone had a good question: is it at all
>>possible that tropo, skip, or other form of enhanced propagation can
>>enable
>>a contact via a satellite below the horizon?
>>
>> It has never happened to me. Has it ever happened?
>>
>> 73, Bill NZ5N
>>
>>
------------------------------
_______________________________________________
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End of AMSAT-BB Digest, Vol 6, Issue 152
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