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CX2SA > SATDIG 25.07.20 18:34l 652 Lines 21611 Bytes #999 (0) @ WW
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Sent: 200725/1630Z @:CX2SA.SAL.URY.SOAM #:36055 [Salto] FBB7.00e $:AMSATBB15298
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: FM Satellite HT Night Proposal (Koos van den Hout)
2. Re: RS-44 orbit (Nico Janssen)
3. RS-44 orbit (ok2gz)
4. Re: FM Satellite HT Night Proposal (Yono Adisoemarta)
5. FM Satellite HT Night Proposal (Douglas Tabor)
6. Re: FM Satellite HT Night Proposal (kd4iz@?????.????
7. Re: Ballots? (Jonathan Wesley Stone (KI5BEX))
8. Re: Ballots? (H. Stephen Nipper)
9. W0AAE GRID ROVING TO EN47 AREA (Ham Radio Essentials)
10. AO7 yesterday (Joseph Trombino, Jr)
11. Arrow antenna for sale (n4qwf)
12. Re: HEO junk? (Mark Lockwood)
13. Re: Ballots? (W3AB/GEO)
----------------------------------------------------------------------
Message: 1
Date: Sat, 25 Jul 2020 11:12:19 +0200
From: Koos van den Hout <koos@??????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] FM Satellite HT Night Proposal
Message-ID: <20200725091219.3hp4sxfiwjg3ahts@??????.???>
Content-Type: text/plain; charset=utf-8
Quoting Walter Holmes via AMSAT-BB who wrote on Sat 2020-07-25 at 00:49:
> Any idea what the chances would be of having something like 1 night a week
or month, on ONE of the FM birds, that could be reserved for HT access only?
>
> My thinking on this would be a great way for people to test out their
portable or limited satellite stations with a great deal less collisions
against all the other much stronger stations.
>
> I have heard from plenty of people that would like to try a temporary or
portable station on the birds, but we all know that?s not even a remote
possibility unless your on super early in the morning or late at night.
As it happens I was trying a new radio for a portable setup last evening
(I bought a KG-UV1K to get full-duplex capabilities).
On a not-to-high pass yesterday evening (max 21 degrees elevation with lots
of buildings around) I did hear AO-92 and could understand some of the
callsigns, but could not get in at all. Mister Ollaaaa was also active on
some occassions. I will try again on a higher pass.
My plan is to bring it along on an upcoming holiday, which will be in a
somewhat rare grid. But since it's a holiday and I'm not sure when a pass
will be at a usable time, I'm not going to announce it as an activation. I
may just make a few contacts.
So I'm the 'target audience' for your idea, and I really think it's a good
idea.
Koos PE4KH
--
Amateur station PE4KH
https://pe4kh.idefix.net/
------------------------------
Message: 2
Date: Sat, 25 Jul 2020 11:36:24 +0200
From: Nico Janssen <hamsat@??????.??>
To: 73 Bob W7LRD <w7lrd@???????.???>, amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] RS-44 orbit
Message-ID: <93237af4-8b15-d442-9d29-3921fa446012@??????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
Bob,
If you look at the TLE for RS 44 you will see that the argument of perigee
currently is near 139 degrees. Since this value is between 0 and 180
degrees,
that means that the perigee (the low point of the orbit) is over the
northern
hemisphere. Therefore the apogee (the high point of the orbit) is over the
southern hemisphere. But if you monitor the TLEs for RS 44 over a longer
period you will notice that the value of the argument of perigee drifts. As
soon as that value comes between 180 and 360 degrees, the apogee is over
the northern hemisphere.
Usually the argument of perigee of satellites will drift. How fast it drifts
depends on the orbit inclination. There is only one situation where the
argument of perigee does not drift. That is when the inclination has a value
of 63.435 degrees. Then the latitude of both perigee and apogee will remain
constant.
Hope this helps.
73,
Nico PA0DLO
On 25-07-2020 10:09, 73 Bob W7LRD via AMSAT-BB wrote:
> Hi-RS44 varies in altitude from about 1180 to about 1525. Seemingly
always in the southern hemisphere. I'm trying to wrap my head around the
orbital mechanics and getting nowhere. Does the maximum height ever get to
the northern hemisphere? I'm obviously missing something here, a little
help please.
> 73 Bob W7LRD
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Sat, 25 Jul 2020 13:17:25 +0200
From: ok2gz <ok2gz@??????.??>
To: amsat-bb@?????.???
Subject: [amsat-bb] RS-44 orbit
Message-ID: <044de62f-6e93-b3f1-3504-877a209c67f0@??????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Bob and Nico,
?I want to add some info about this problem.
If You have the ARRL Satellite Handbook, see? page A-8 (Appendix A -
Satellite Orbits).
There is Equation 13a, which give us the value - rate of change of
argument of perigee in degrees per day.
The value for RS-44 with? current TLE data is?? -2.3331333 degrees per day.
A negative value means that the ARGP angle will be smaller tomorrow.
For example 180? degrees divided by -2.3331333 is approx. -77.1495471 days.
So, in 77.15 days the positions of the apogee and perigee will be swaped.
And yet, if we have apogee in the best position for some rare qso with
RS-44 transponder,? this situation will be repeated 2.366 times per year.
My calculation:
360/2.3331333 = 154.2989
and 365 days / 154.2989 is 2.366
With the same equation 13a? we can calculate the famous angle of 63.435
degrees of inclination with zero drift as Nico says. This angle was used
by the old Russian Molnia satellites at a time when it was still
difficult to reach a geostationary orbit.
My favorite FO-29 (now probably nice history) has Rate of change ARGP
-2.573348 deg/day.
Yet, AO-91 with elliptical orbit (apogee 811.8 km /perigee 453.6 km) has
Rate of change ARGP? = -3.251476 degrees/day, so it takes -55.359 days
for exchange apogee and perigee positions..
It is very good to check the ARGP angle in the TLE data when working via
elliptical orbiting satellites.
For example, for the qso between the eastern costs of the USA and
Europe, we need an orbit height of approximately 950 km (for OK
stations). FO-29has an apogee height of 1320.8 km, perigee 801.2 km. It
was not possible to make with the apogee in the wrong position
QSO? USA-Europe...
73
Jarda ok2gz
--
This email has been checked for viruses by AVG.
https://www.avg.com
------------------------------
Message: 4
Date: Sat, 25 Jul 2020 19:15:35 +0700
From: Yono Adisoemarta <yono_adisoemarta@?????.???>
To: Koos van den Hout <koos@??????.???>
Cc: AMSAT-BB@?????.???
Subject: Re: [amsat-bb] FM Satellite HT Night Proposal
Message-ID: <9A975409-FCDA-482E-9AB6-4C170D8C8FB6@?????.???>
Content-Type: text/plain; charset=utf-8
We have conducted several times ?HT only pass? on IO-86.
Real nice to practice sat qso using HT.
73 de Yono - YD0NXX
Jakarta - Indonesia
Sent from my iPhone
> On Jul 25, 2020, at 4:18 PM, Koos van den Hout via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?Quoting Walter Holmes via AMSAT-BB who wrote on Sat 2020-07-25 at 00:49:
>
>> Any idea what the chances would be of having something like 1 night a
week or month, on ONE of the FM birds, that could be reserved for HT access
only?
>>
>> My thinking on this would be a great way for people to test out their
portable or limited satellite stations with a great deal less collisions
against all the other much stronger stations.
>>
>> I have heard from plenty of people that would like to try a temporary or
portable station on the birds, but we all know that?s not even a remote
possibility unless your on super early in the morning or late at night.
------------------------------
Message: 5
Date: Sat, 25 Jul 2020 07:15:17 -0600
From: Douglas Tabor <dtabor52@?????.???>
To: AMSAT-BB@?????.???
Subject: [amsat-bb] FM Satellite HT Night Proposal
Message-ID: <8A80B964-B31B-4BCB-8D69-93F55D3D73F1@?????.???>
Content-Type: text/plain; charset=utf-8
I really like Walters? idea of having an HT only (or QRP) time for
an FM satellite.
Once a week or even month would be fine. I have special memories
of using my TH-D72 with a long whip getting into AO-91 and working
ZL3GAV (from RF73 to RE66) back in 2018.
My thought is this non-QRO time would allow new-to-sat hams and those
testing portable equipment an opportunity to experience the wonder of
satellites without having to wedge themselves between other QSOs.
And to Walters? final comment about operating with an HT and an Arrow
That was my experience for two years with ONLY SO-50 available and a
Yaesu FT-530 running 2.5 watts. The competition for SO-50 was intense
with other rovers and QRO stations.
Hector (congrats GridMaster #13) suggested I use a larger battery for
full 5 watts from the FT-530. This could be one of potential results
for an operator using this ?special? time for HT-only FM sat usage.
73 and Dream On Walter. Great idea!
Doug, N6UA
Douglas Tabor
dtabor52@?????.???
------------------------------
Message: 6
Date: Sat, 25 Jul 2020 11:15:06 -0400
From: <kd4iz@?????.???>
To: <walterh@????.???>
Cc: AMSAT-BB@?????.???
Subject: Re: [amsat-bb] FM Satellite HT Night Proposal
Message-ID: <022501d66296$62c76720$28563560$@?????.???>
Content-Type: text/plain; charset="utf-8"
Hi Walter,
I'd love it! I am still learning (or trying) how to do FM HT w an Arrow here
and have had some "1/2 successes" but nothing great... certainly not
rewarding enough for me to stand out in the yard pass after pass trying in
July heat and humidity.
A serious problem is (as pointed out by Koos), interjections by "Mr. Ollaaa"
along with QRO sigs swamping the birds.
Challenge: Do we (general hamdom) have the discipline and civility to
observe an HT only/no QRO pass schedules?
"Wouldn't it be nice if...?" (credit Mike Love/Brian Wilson)
Jack Spitznagel ? KD4IZ
Trustee for NR3DT
Museum Ship USCGC W-37 Amateur Radio Group
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Walter Holmes via
AMSAT-BB
Sent: Saturday, July 25, 2020 01:49
To: 'AMSAT BB' <AMSAT-BB@?????.???>
Subject: [amsat-bb] FM Satellite HT Night Proposal
A little food for thought:
Any idea what the chances would be of having something like 1 night a week
or month, on ONE of the FM birds, that could be reserved for HT access only?
My thinking on this would be a great way for people to test out their
portable or limited satellite stations with a great deal less collisions
against all the other much stronger stations.
I have heard from plenty of people that would like to try a temporary or
portable station on the birds, but we all know that?s not even a remote
possibility unless your on super early in the morning or late at night.
Ie.. it would be great to see how many people could test and build their
skills to operate with an HT and an arrow or something, kinda like the old
days. ?
Just dreaming out-loud. ?
Walter/K5WH
_______________________________________________
Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Fri, 24 Jul 2020 18:26:21 -0500
From: "Jonathan Wesley Stone (KI5BEX)"
<jonathanwesleystone+KI5BEX@?????.???>
To: "Doug Faunt N6TQS +1-510-717-1197" <dougfaunt@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Ballots?
Message-ID:
<CAJQcYMh4od=-eprQo-mFcxwAveRu=Lgn-x2qsRkrpbgqM1KwrA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I am rooting for USPS, but I hear what you are saying. But, hear me: we
should be able to cast our vote via satellite pass QSO with the secretary.
This is fine, since no one is allowed to use another's callsign.
Cheers and '73!
kilo india five blahblah e!@???????? x-ray
On Thu, Jul 23, 2020 at 8:58 PM Doug Faunt N6TQS +1-510-717-1197 via
AMSAT-BB <amsat-bb@?????.???> wrote:
> It's pretty sad we can't vote online. I had to use up one of my stock
> of stamps- how 20th century, like checks.
> 73, doug
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 8
Date: Sat, 25 Jul 2020 09:24:49 -0600
From: "H. Stephen Nipper" <stephennipper@?????.???>
To: "Jonathan Wesley Stone (KI5BEX)"
<jonathanwesleystone+KI5BEX@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>, Doug Faunt N6TQS +1-510-717-1197
<dougfaunt@?????.???>
Subject: Re: [amsat-bb] Ballots?
Message-ID:
<CAPf7+3pvKo8UxeXB0hQ1qObaLXBab1H3MHaE84c+sWfBsQ-rLg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I am starting to wonder if the USPS is back to using the Pony Express to
get the Ballots to us in Idaho. Still nothing. When do they have to be
returned? Hope they give enough time for the pony to make it back east.
On Sat, Jul 25, 2020 at 9:21 AM Jonathan Wesley Stone (KI5BEX) via AMSAT-BB
<amsat-bb@?????.???> wrote:
> I am rooting for USPS, but I hear what you are saying. But, hear me: we
> should be able to cast our vote via satellite pass QSO with the secretary.
> This is fine, since no one is allowed to use another's callsign.
>
> Cheers and '73!
> kilo india five blahblah e!@???????? x-ray
>
>
> On Thu, Jul 23, 2020 at 8:58 PM Doug Faunt N6TQS +1-510-717-1197 via
> AMSAT-BB <amsat-bb@?????.???> wrote:
>
> > It's pretty sad we can't vote online. I had to use up one of my stock
> > of stamps- how 20th century, like checks.
> > 73, doug
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
> >
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
--
Stephen Nipper
Boise, Idaho
N7DJX
------------------------------
Message: 9
Date: Sat, 25 Jul 2020 10:34:19 -0500
From: Ham Radio Essentials <arrl.kvan@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] W0AAE GRID ROVING TO EN47 AREA
Message-ID:
<CA+-4fePmT=GFnpTB+zjELAmDaxYSky6PkP5rs1NgLwKKqJX3RQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hello all,
Sorry this information is a little late. I've been busy with other stuff. I
will be going to the North Shore of Minnesota, July 26-29 . I'm hoping to
activate a few grids on this trip. Grids will probably be EN47, EN46, or
around those grids. I will only be doing AO-91 and AO-92 satellites, and
maybe some SO-50. This will be a relaxing trip, so I will get on the
satellites when I can. Thanks everybody!
73 de W0AAE
------------------------------
Message: 10
Date: Sat, 25 Jul 2020 11:42:33 -0400
From: "Joseph Trombino, Jr" <w2kj@?????????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] AO7 yesterday
Message-ID: <917DD52E-77DE-4962-9DB6-42BA6D4FFBE4@?????????.???>
Content-Type: text/plain; charset=utf-8
Howdy Gang.
Got my SSB preamps installed yesterday and listened for AO7 just for grins.
Listened on the beacon frequency 145.700Mhz+/- for a few minutes past AOS
and heard nothing.
Tuned down into the passband heard a couple of stations?believe I copied
KB1HY in FN31 on SSB.
Is the beacon still working on AO7?
Just getting my feet wet after quite a few years.
73, Joe W2KJ
------------------------------
Message: 11
Date: Sat, 25 Jul 2020 12:01:50 -0400
From: n4qwf <n4qwf1@?????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: [amsat-bb] Arrow antenna for sale
Message-ID:
<CA+Fxo6Ry96YUu8YrwtftagkVy8ac0kOHOhyXur2YyCUOmrEhuw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I have the model 146/437-10wBP arrow antenna I wish to sell. It has the
removable duplexer in the handle and is the split boom model. It has 3
elements for VHF and 7 elements for UHF. It is in excellent condition. The
new price is $159.00 for this antenna. I am asking $100.00 plus shipping.
Thanks <<John
------------------------------
Message: 12
Date: Sat, 25 Jul 2020 10:11:28 -0600
From: Mark Lockwood <mark@?????.???>
To: Clint Bradford <clintbradford@???.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HEO junk?
Message-ID:
<CAHG=g5u3sJ1h1DDWfNAPVJ6YcaQT2NLh_JSvzfdPq7rUgFGzNw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
There are many man made objects in orbit. The mission plan for
Geo-stationary satellites is to super-sync them at end of life sending them
into a higher orbit out of the way of the rest of the geo constellation.
Geo is fairly high orbit, approximately 22,300 miles above the equator, and
they need to get them significantly above that to retire them.
On Fri, Jul 24, 2020 at 11:59 AM Clint Bradford via AMSAT-BB <
amsat-bb@?????.???> wrote:
> While looking for the comet from Southern California last night (too low
> to
> see through city lights), I saw something right above me ? moving ?
>
> Way too slow to be what I would call ?low-earth? stuff ?
>
> Which meant is was much higher? Is there ?HEO junk? out there?
>
> Puzzled,
>
> Clint K6LCS
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
--
Mark Lockwood
Digital Business Card <http://linkmwl.xyz/yrl/emailsig>
------------------------------
Message: 13
Date: Sat, 25 Jul 2020 09:22:44 -0700
From: W3AB/GEO <w3ab@?????.???>
To: "Jonathan Wesley Stone (KI5BEX) "
<jonathanwesleystone+ki5bex@?????.???>
Cc: amsat-bb@?????.???? Doug Faunt N6TQS +1-510-717-1197
<dougfaunt@?????.???>
Subject: Re: [amsat-bb] Ballots?
Message-ID: <fea91ba3-0516-4c41-abc7-bcac75cc2989@?????.???>
Content-Type: text/plain; charset=UTF-8
Do the on-air pirates know that? ?
"This is fine, since no one is allowed to use another's callsign."
?___
Sent from my two way wrist watch
73 de W3AB/GEO?
On Jul 25, 2020, 08:22, at 08:22, "Jonathan Wesley Stone (KI5BEX) via
AMSAT-BB" <amsat-bb@?????.???> wrote:
>I am rooting for USPS, but I hear what you are saying. But, hear me: we
>should be able to cast our vote via satellite pass QSO with the
>secretary.
>This is fine, since no one is allowed to use another's callsign.
>
>Cheers and '73!
>kilo india five blahblah e!@???????? x-ray
>
>
>On Thu, Jul 23, 2020 at 8:58 PM Doug Faunt N6TQS +1-510-717-1197 via
>AMSAT-BB <amsat-bb@?????.???> wrote:
>
>> It's pretty sad we can't vote online. I had to use up one of my
>stock
>> of stamps- how 20th century, like checks.
>> 73, doug
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. 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:
>https://www.amsat.org/mailman/listinfo/amsat-bb
>>
>_______________________________________________
>Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
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!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 298
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