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CX2SA > SATDIG 26.02.10 22:18l 469 Lines 13524 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: future apogee calculation (Vince Fiscus, KB7ADL)
2. success with 2E1EUB (Bob- W7LRD)
3. *****AO7 DX W7LRD WORKED 2E1EUB ! ****** (paul robinson)
4. Re: success with 2E1EUB (David Wing)
5. Re: *****AO7 DX W7LRD WORKED 2E1EUB ! ******
(Vince Fiscus, KB7ADL)
6. Re: future apogee calculation (Vince Fiscus, KB7ADL)
7. Re: success with 2E1EUB (Tim - N3TL)
8. IC-910/preamp (Bob- W7LRD)
9. IC-910/preamp (Bob- W7LRD)
10. ND9M Road Trip Update #15 (claryco@xxx.xxxx
11. Max range apogee vs perigee (Pierre van Deventer)
12. Planet Pseudo-Keps (Jeff Yanko)
13. Re: Max range apogee vs perigee (jmfranke)
14. Re: Planet Pseudo-Keps (Robert Bruninga)
----------------------------------------------------------------------
Message: 1
Date: Thu, 25 Feb 2010 13:03:35 -0700
From: "Vince Fiscus, KB7ADL" <vlfiscus@xxx.xxx>
Subject: [amsat-bb] Re: future apogee calculation
To: amsat-bb@xxxxx.xxx
Message-ID: <5.2.1.1.2.20100225124929.00c37730@xxx.xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"; format=flowed
At 05:07 PM 2/25/2010 +0000, Bob- W7LRD <w7lrd@xxxxxxx.xxx> wrote:
>Hello Is there a "easy" way of figuring out where/when a given apogee will
>at a given lat.long?? I want to try to predetermine when the apogee will
>be on AO-7 to favor the northern hemisphere.? To "maybe" help in dx
>contacts.? The difference is only bout 17km in altitude, it just might
>streeeetch the footprint enough.? Also just how much does the 17km add to
>the footprint?? 73 Bob W7LRD
Bob,
I don't think the difference between apogee and perigee on a LEO with a
fairly circular orbit really makes that much of difference. So instead of
the apogee, what you really want to know are all the longitudes where the
sub satellite point reaches it's most northern most latitude. You could
probably write on script for filtering the output of some of the older
satellite tracking programs that only makes a
date-time-latitude-and-longitude entry whenever the SSP gets above a
certain latitude.
KB7ADL
------------------------------
Message: 2
Date: Thu, 25 Feb 2010 21:38:47 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] success with 2E1EUB
To: AMSAT-bb@xxxxx.xxx
Message-ID:
<1725662277.7857871267133927930.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxx
xx.xxx>
Content-Type: text/plain; charset=utf-8
We have been trying many weeks to have a simple QSO, with several near
misses.? At 2120Z via AO-7 I got a, "you are 5/1 here".? At 7504 km not a
record, but a real fun effort.? Next is Eric-PA1TNO, I may have to go
portable on a nearby mountain.
73 Bob W7LRD
CN87
------------------------------
Message: 3
Date: Thu, 25 Feb 2010 21:51:28 +0000 (GMT)
From: paul robinson <pushbiker2004@xxxxx.xx.xx>
Subject: [amsat-bb] *****AO7 DX W7LRD WORKED 2E1EUB ! ******
To: amsat-bb@xxxxx.xxx
Message-ID: <996361.39789.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
To night ?at abt 9.17 gmt on AO7 , mode B? Bob W7LRD and myself confirmed
working each other ,exchanged reports etc and was very workable below 0.3
deg ! althrough not a record cn87 to io92bx works out to be 7504.52 km
distance but may well be a United Kingdom A07 record?? thanks Bob and thanks
for all you guys on A07 ! -Paul 2E1EUB
------------------------------
Message: 4
Date: Thu, 25 Feb 2010 13:52:05 -0800
From: "David Wing" <david@xxxxxx.xxx>
Subject: [amsat-bb] Re: success with 2E1EUB
To: "'Bob- W7LRD'" <w7lrd@xxxxxxx.xxx>, <AMSAT-bb@xxxxx.xxx>
Message-ID: <BB22325CF23F434DB00DDAACFDE33F32@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Congratulations Bob! Success is sweet and I see you have already found a
new mountain to conquer, hihi.
73
David
K6CDW
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Bob- W7LRD
Sent: Thursday, February 25, 2010 1:39 PM
To: AMSAT-bb@xxxxx.xxx
Subject: [amsat-bb] success with 2E1EUB
We have been trying many weeks to have a simple QSO, with several near
misses.? At 2120Z via AO-7 I got a, "you are 5/1 here".? At 7504 km not a
record, but a real fun effort.? Next is Eric-PA1TNO, I may have to go
portable on a nearby mountain.
73 Bob W7LRD
CN87
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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------------------------------
Message: 5
Date: Thu, 25 Feb 2010 15:19:54 -0700
From: "Vince Fiscus, KB7ADL" <vlfiscus@xxx.xxx>
Subject: [amsat-bb] Re: *****AO7 DX W7LRD WORKED 2E1EUB ! ******
To: amsat-bb@xxxxx.xxx
Message-ID: <5.2.1.1.2.20100225150115.00c378a8@xxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 09:51 PM 2/25/2010 +0000, paul robinson <pushbiker2004@xxxxx.xx.xx> wrote:
>To night at abt 9.17 gmt on AO7 , mode B Bob W7LRD and myself confirmed
>working each other ,exchanged reports etc and was very workable below 0.3
>deg ! althrough not a record cn87 to io92bx works out to be 7504.52 km
>distance but may well be a United Kingdom A07 record?? thanks Bob and
>thanks for all you guys on A07 ! -Paul 2E1EUB
Congrats!
I just wish all the DX'ers weren't already in bed when I get to fire up
rigs in the evenings. ;-)
I did hear Sweden one Sunday morning once though.
73
------------------------------
Message: 6
Date: Thu, 25 Feb 2010 15:26:37 -0700
From: "Vince Fiscus, KB7ADL" <vlfiscus@xxx.xxx>
Subject: [amsat-bb] Re: future apogee calculation
To: amsat-bb@xxxxx.xxx
Message-ID: <5.2.1.1.2.20100225150605.00c3b600@xxxxxxxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"; format=flowed
At 05:07 PM 2/25/2010 +0000, Bob- W7LRD <w7lrd@xxxxxxx.xxx> wrote:
>Hello Is there a "easy" way of figuring out where/when a given apogee will
>at a given lat.long?? I want to try to predetermine when the apogee will
>be on AO-7 to favor the northern hemisphere.? To "maybe" help in dx
>contacts.? The difference is only bout 17km in altitude, it just might
>streeeetch the footprint enough.? Also just how much does the 17km add to
>the footprint?? 73 Bob W7LRD
OK, Now to answer your question Bob.
If you want that extra 15km of altitude you get with AO-7 at apogee, the
next time AO-7 will be having apogees at the most northern latitudes it
reaches will be on orbits around June 17th to the 18th. Apogee will occur
around 78 degrees N Lat.
KB7ADL
------------------------------
Message: 7
Date: Thu, 25 Feb 2010 14:40:58 -0800 (PST)
From: Tim - N3TL <n3tl@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: success with 2E1EUB
To: Bob- W7LRD <w7lrd@xxxxxxx.xxx>, AMSAT-bb@xxxxx.xxx
Message-ID: <876232.32217.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Congratulations Bob and Paul!
This is an outstanding accomplishement -?regardless of any record?- and yet
another example of why so many of us think so much of Grand Old AO-7.
73,
Tim - N3TL
________________________________
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
To: AMSAT-bb@xxxxx.xxx
Sent: Thu, February 25, 2010 4:38:47 PM
Subject: [amsat-bb] success with 2E1EUB
We have been trying many weeks to have a simple QSO, with several near
misses.? At 2120Z via AO-7 I got a, "you are 5/1 here".? At 7504 km not a
record, but a real fun effort.? Next is Eric-PA1TNO, I may have to go
portable on a nearby mountain.
73 Bob W7LRD
CN87
_______________________________________________
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: Fri, 26 Feb 2010 05:47:06 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] IC-910/preamp
To: amsat-bb@xxxxx.xxx
Message-ID:
<1718148187.8039471267163226421.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxx
xx.xxx>
Content-Type: text/plain; charset=utf-8
Hello 910 owners
I am trying to get my AG-25 preamp running.? In the set mode- I set the pre
144 to on.? Should I then be able to measure 12v? at the ?2M antenna output
to run the preamp?? I get nothing.?
73 Bob W7LRD
------------------------------
Message: 9
Date: Fri, 26 Feb 2010 06:07:22 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] IC-910/preamp
To: amsat-bb@xxxxx.xxx
Message-ID:
<2002208970.8042511267164442501.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxx
xx.xxx>
Content-Type: text/plain; charset=utf-8
Hello (again)
Disragard my 910 question.? I actually read the manual, where is says hold
the p. amp/att button for one second.? I'll go back in my corner now.
73 Bob W7LRD
------------------------------
Message: 10
Date: Fri, 26 Feb 2010 01:23:37 -0500
From: claryco@xxx.xxx
Subject: [amsat-bb] ND9M Road Trip Update #15
To: amsat-bb@xxxxx.xxx
Message-ID: <8CC84C35D8E2A96-1B20-6ABC@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I'll be on from the EL17 / EL18 line tomorrow (Friday) on two SO50 passes
(local AOS at 26/1840Z and 26/2022Z) as well as AO27 which switches to VOX
at 26/1957Z.
We're taking Saturday off, but I'll operate from the EL28 / EL29 line on
Sunday on the four AO27 and SO50 passes between 28/1800-2050Z.
73,
Jim, ND9M / VQ9JC
Corpus Christi, TX / EL17
------------------------------
Message: 11
Date: Fri, 26 Feb 2010 09:31:25 +0200
From: "Pierre van Deventer" <pierrevd@xxxx.xx.xx>
Subject: [amsat-bb] Max range apogee vs perigee
To: <AMSAT-BB@xxxxx.xxx>
Message-ID: <000301cab6b5$b61425f0$223c71d0$@xx.xx>
Content-Type: text/plain; charset="us-ascii"
Bob W7LRD
I came across this info, might be of some value.
Ref: The Satellite Experimenters Handbook, Pg 9-6
Max Dist (range) = 2R * arcos [R/(R+h)]
Where R = 6,371 km and
h = 1,459 km at Apogee (AO-7)
h = 1,440 km at Perigee (AO-7)
Therefore the maximum possible communication distance via AO-7 at Apogee =
7,904 km.
Therefore the maximum possible communication distance via AO-7 at Perigee =
7,861 km.
The difference in range from apogee to perigee appears to be only 33 km.
73, Pierre ZS6BB
------------------------------
Message: 12
Date: Fri, 26 Feb 2010 01:09:55 -0800
From: "Jeff Yanko" <wb3jfs@xxx.xxx>
Subject: [amsat-bb] Planet Pseudo-Keps
To: <amsat-bb@xxxxx.xxx>
Message-ID: <BE2645E0E07B4DC5B2641905F3AB9B26@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
A few weeks ago somebody posted pseudo-keps to the -bb and from the looks of
the queries and comments, many have installed them on their tracking
programs. Which brings to question. Are there any pseudo-keps for the
planets?
73,
Jeff WB3JFS
------------------------------
Message: 13
Date: Fri, 26 Feb 2010 07:44:50 -0500
From: "jmfranke" <jmfranke@xxx.xxx>
Subject: [amsat-bb] Re: Max range apogee vs perigee
To: "Pierre van Deventer" <pierrevd@xxxx.xx.xx>, <AMSAT-BB@xxxxx.xxx>
Message-ID: <C103795B9B4948B09600EC2B9DB67B9B@xxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
The numbers assume the antenna is on the surface of the Earth. You must add
the distance from the antenna to the local horizon to the calculated
figures. And, there is refraction.
John WA4WDL
--------------------------------------------------
From: "Pierre van Deventer" <pierrevd@xxxx.xx.xx>
Sent: Friday, February 26, 2010 2:31 AM
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Max range apogee vs perigee
> Bob W7LRD
>
>
> I came across this info, might be of some value.
>
> Ref: The Satellite Experimenters Handbook, Pg 9-6
>
> Max Dist (range) = 2R * arcos [R/(R+h)]
>
> Where R = 6,371 km and
> h = 1,459 km at Apogee (AO-7)
> h = 1,440 km at Perigee (AO-7)
>
> Therefore the maximum possible communication distance via AO-7 at Apogee =
> 7,904 km.
> Therefore the maximum possible communication distance via AO-7 at Perigee
> =
> 7,861 km.
>
> The difference in range from apogee to perigee appears to be only 33 km.
>
>
> 73, Pierre ZS6BB
>
>
> _______________________________________________
> 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: 14
Date: Fri, 26 Feb 2010 08:31:42 -0500
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: Planet Pseudo-Keps
To: "'Jeff Yanko'" <wb3jfs@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <C043317A51C74D168FE4BECDDBD0EB3A@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
> Are there any pseudo-keps for the planets?
Actually, the word planet comes from the meaning "wanderers"
because that is what stumped the early astronomers thousands of
years ago. They do not have regular motion about Earth... And
Copernicus finally figured it out... They rotate around the sun.
Bob
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 5, Issue 96
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