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CX2SA > SATDIG 23.10.16 17:46l 1211 Lines 42869 Bytes #999 (0) @ WW
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Sent: 161023/1541Z @:CX2SA.SAL.URY.SOAM #:56305 [Salto] FBB7.00e $:AMSATBB11343
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: SatPC32 Doppler problem (Pedro Converso)
2. ANS-297 AMSAT News Service Weekly Bulletins (Joseph Spier)
3. Re: SatPC32 Doppler problem (George Henry)
4. Re: Crossed polarity dual band single feed yagi (John Toscano)
5. Re: SatPC32 Doppler problem (PE0SAT | Amateur Radio)
6. Re: SatPC32 Doppler problem (Erich Eichmann)
7. Software Problems (Joe)
8. Re: Software Problems (Graham)
9. Re: Software Problems (w4upd)
----------------------------------------------------------------------
Message: 1
Date: Sat, 22 Oct 2016 18:07:26 -0300
From: Pedro Converso <pconver@xxxxx.xxx>
To: Mark Johns <mjohns@xxxxxx.xxx>, Mark Johns <mjohns166@xxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SatPC32 Doppler problem
Message-ID:
<CANTZqKnZJyoHZb_JkSVuTzTeZdF834-ATDsMXRoZXtykhH6agw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Mark,
I have used for FO-29 this pair of central frequencies:
FO-29,435851.95,145951.6,USB,LSB,REV,0,0,Transponder
they are working for me on an FT-736R.
These are used on http://amsat.org.ar/pass.htm using wispDDE
Hope you get on sync with this nice Sat.
73, lu7abf, Pedro Converso
On Sat, Oct 22, 2016 at 5:32 PM, Mark Johns via AMSAT-BB
<amsat-bb@xxxxx.xxx> wrote:
> For some reason, my SatPC32 has stopped correctly compensating for Doppler
shift on FO-29. I'm continually having to "find myself" all over the
passband, making adjustments throughout the pass, just like the old days
when everything was manual.
>
> I've updated the Keps. I marked the uplink and downlink freqs at time of
closest approach on a high-elevation pass, and re-edited my Doppler.SQF with
those numbers.
>
> SatPC32 is talking to the rig, and it does make regular changes to both
uplink and downlink frequencies -- they just happen not to be correct.
>
> I'm stumped! Any thoughts?--
>
> Mark D. Johns, K?MDJ
> Decorah, Iowa USA EN43
> -----------------------------------------------
> "Heaven goes by favor; if it went by merit,
> you would stay out and your dog would go in."
> ---Mark Twain
> _______________________________________________
> 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: Sat, 22 Oct 2016 19:20:00 -0700
From: Joseph Spier <wao@xxx.xxx>
To: ans@xxxxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ANS-297 AMSAT News Service Weekly Bulletins
Message-ID: <84a7394c-71a4-4390-3d1a-5e922c777287@xxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
AMSAT NEWS SERVICE
ANS-297
The AMSAT News Service bulletins are a free, weekly news and infor-
mation service of AMSAT North America, The Radio Amateur Satellite
Corporation. ANS publishes news related to Amateur Radio in Space
including reports on the activities of a worldwide group of Amateur
Radio operators who share an active interest in designing, building,
launching and communicating through analog and digital Amateur Radio
satellites.
The news feed on http://www.amsat.org publishes news of Amateur
Radio in Space as soon as our volunteers can post it.
Please send any amateur satellite news or reports to:
ans-editor at amsat.org.
In this edition:
* VHF Handheld Radio Failed, ARISS Contacts Moved to Kenwood Radio on Board
the International Space Station (ISS)
* New ARISS Equipment Completes Major Milestone, Donations Still Needed
* ESEO Satellite Project
* iCubeSat 2017 Workshop
* 2016 AMSAT Space Symposium at Sea Registration Still Open
* ARISS Proposal Window Closes November 1, 2016
* AMSAT Events
* ARISS News
* Satellite Shorts From All Over
SB SAT @ AMSAT $ANS-297.01
ANS-297 AMSAT News Service Weekly Bulletins
AMSAT News Service Bulletin 297.01
>From AMSAT HQ KENSINGTON, MD.
DATE October 23, 2016
To All RADIO AMATEURS
BID: $ANS-297.01
---------------------------------------------------------------------
VHF Handheld Radio Failed, ARISS Contacts Moved to Kenwood Radio on Board
the International Space Station (ISS)
The VHF handheld radio model that has been used by the ARISS program to
connect students worldwide with astronauts on board the International Space
Station (ISS) for over 16 years has given an error message and is
unusable at
this time. While the ARISS technical team evaluates the best path to restore
operation from the Columbus module, ARISS contacts will be supported
using the
Kenwood radio in the Russian Service Module. During this period, the packet
digipeater will be unavailable.
Switching to the 70 cm radio capability on board the Columbus module for
some
operations is being coordinated. Expect further updates as we work to
resolve
this problem.
Amateur Radio on the International Space Station (ARISS) is a cooperative
venture of international amateur radio societies and the space agencies that
support the International Space Station (ISS). In the United States,
sponsors
are the Radio Amateur Satellite Corporation (AMSAT), the American Radio
Relay
League (ARRL), the Center for the Advancement of Science in Space
(CASIS) and
National Aeronautics and Space Administration (NASA). The primary goal of
ARISS is to promote exploration of science, technology, engineering, and
mathematics (STEM) topics by organizing scheduled contacts via amateur radio
between crew members aboard the ISS and students in classrooms or informal
education venues. With the help of experienced amateur radio
volunteers, ISS
crews speak directly with large audiences in a variety of public forums.
Before and during these radio contacts, students, teachers, parents, and
communities learn about space, space technologies, and amateur radio.
For more information, see
www.ariss.org
www.amsat.org
www.arrl.org.
[ANS thanks ARISS, and Dave Jordan, AA4KN for the above information]
---------------------------------------------------------------------
New ARISS Equipment Completes Major Milestone, Donations Still Needed
Yesterday, October 21, 2016, the ARISS hardware team accomplished a very
major
milestone ? the successful completion of the Technical Interchange Meeting
(TIM)for the Interoperable Hardware System, which includes the JVC
Kenwood D710
Radio and the Multi Voltage Power Supply.
The TIM was conducted as an ARISS hardware milestone from the Technical
Evaluation and Support (TES) Committee and our international members from
TES were present. The TIM also had subject matter experts from NASA
attending
and providing advice as well as a former (retired) chief engineer from
the NASA
Space Communication and Navigation (SCaN) organization. All in all, ARISS
received great advice and suggestions on how to move forward with the
hardware
development. I am most proud that we have completed this first major
milestone
in the development of the next ARISS hardware upgrade to fly on ISS.
On behalf of the ARISS International team, I would like to thank TES
co-leads
Mark Steiner and Lou McFadin for their leadership in getting the important
milestone accomplished. I would also like to thank Kerry Banke, the Multi
Voltage Power Supply developer, Bob Davis who is developing the mechanical
enclosure for the system, and Bob Bruninga and Dave Taylor for their help on
the D710 programming modes. And, of course, special thanks goes to JVC
Kenwood and Aota Shin and Phil Parton for their support, equipment and
engineering that will serve ARISS and the ham community for years to come.
With this milestone completed, we will move forward with the design process
and finalize the design with a TIM in the next few months. Our next hurdle
will be the Phase 0 safety review which we hope to complete before the
end of
this year. While aggressive, we are still working with NASA towards an
October
2017 launch of the hardware system.
The costs and effort to develop and certify equipment for human spaceflight
missions is very high. The bulk of this cost is for safety certification
testing and hazard reporting expertise. We have estimated that from
beginning
to end (a 3 year development cycle), the costs for the new hardware
system are
in the $200k range. Note that we are aggressively pursuing real dollar and
in-kind donations to address this. But, as you know, every bit of funding
helps. That is why we started the ARISS Challenge Coin Donation Campaign
this year at the Dayton Hamvention.
As you communicate this important milestone to your friends, please remind
them that we cannot complete this effort without funding. Human spaceflight
hardware developments are always expensive. They are most welcome to donate
towards the hardware development by pushing the ?ARISS Donate? button at
www.amsat.org.
Those that donate $100 or more will receive a special ARISS
Commemorative Coin.
I thank all of you for all your sustained support and efforts to our ARISS
cause over the years. It is hard to believe that we are nearing 20 years of
ARISS being a team.
[ANS thanks Frank Bauer, KA3HDO, ARISS Chairman for the above information]
---------------------------------------------------------------------
ESEO Satellite Project
Here is a brief update on the ESEO Satellite project which may be of
interest.
"A team of 3 from AMSAT-UK and Surrey Space Center visited Forli in
Italy this
week where the engineering model of the ESEO satellite is being assembled.
During the visit, the team began work integrating the AMSAT payload into
ESEO,
confirming successful 2 way communication communication via the satellites
CAN bus. They also checked the transmission of educational telemetry at
1200
and 4800 bits per second and tested the L band to VHF FM transponder.
ESEO, The European Student Earth Orbiter, is a 50kg satellite from ESA
Education incorporating payloads from AMSAT-UK and Universities around
Europe."
[ANS thanks David, G0MRF, and AMSAT-UK for the above information]
---------------------------------------------------------------------
iCubeSat 2017 Workshop
iCubeSat 2017 - the 6th Interplanetary CubeSat Workshop will be held
30-31 May 2017 in Cambridge, United Kingdom.
The full call for papers and presentations can be found at
www.iCubeSat.org
iCubeSat 2017, the 6th Interplanetary CubeSat Workshop, will address
the technical challenges, opportunities, and practicalities of
interplanetary space exploration with CubeSats. The workshop provides
a unique environment for open wide ranging practical collaboration
between academic researchers, industry professionals, policy makers
and students developing this new and rapidly growing field. The papers
and presentations from previous workshops at Caltech, Cornell, Imperial,
MIT and Oxford may be found at:
https://icubesat.org/
You can see the presentations from this years workshop
at Oxford at the following link:
https://icubesat.org/archive/2016-2/icubesat-program-2016
[ANS thanks Micheal, iCubeSat 2017 Committee for the above information]
---------------------------------------------------------------------
2016 AMSAT Space Symposium at Sea Registration Still Open
If you are an Individual attending Symposium on board the CARNIVAL LIBERTY
departing Galveston, TX on November 10, you must register to attend the
AMSAT
Space Symposium & Annual Meeting through AMSAT. Cruise arrangements made
through Carnival Cruise Lines does not include the registration fee for the
Symposium itself.
There are three options to register for Symposium:
-Complete and mail to the AMSAT Office the 2016 Symposium Registration Form
that was sent to all AMSAT members back in July along with the BoD
ballot along
with payment;
-Call the AMSAT Office (301-822-4376) and speak with AMSAT Office Manager
Martha Saragovitz ; or
-Use the AMSAT Store (store.amsat.org) by selecting the ?2016 AMSAT-NA
Symposium Registration? link found under ?Bestsellers? on the right hand
side
of the store?s main page.
Registration for the Symposium is $40.00 and includes a copy of the
?Proceedings? that contains papers written for the Symposium as well as
technical documentation that AMSAT is placing in the public domain. The
?Proceedings? will be available to attendees onboard ship. In addition, the
registration provides a means to confirm the number of individuals in your
party planning to attend the AMSAT Banquet as well as an opportunity to
reserve
seats for the Field Ops Breakfast. Both meals are open to anyone wishing to
attend (AMSAT Registration is not necessary) and there is no charge for
either
event as food is included in your cruise package. However, by
indicating how
many individuals will be attending, it helps to ensure that sufficient
seating
is made available for each activity.
As the AMSAT Office will not be open after Monday, 7 NOV 16 through that
week,
we ask that your Symposium Registration be received at the AMSAT office by
Friday, 4 NOV 16.
[ANS thanks 2016 AMSAT Space Symposium Committee for the above information]
---------------------------------------------------------------------
ARISS Proposal Window Closes November 1, 2016
The Amateur Radio on the International Space Station (ARISS) Program is
seeking formal and informal education institutions and organizations,
individually or working together, to host an Amateur Radio contact with
a crew
member on board the ISS. ARISS anticipates that the contact would be held
between July 1, 2017 and December 31, 2017. Crew scheduling and ISS
orbits will
determine the exact contact dates. To maximize these radio contact
opportunities, ARISS is looking for organizations that will draw large
numbers
of participants and integrate the contact into a well-developed
education plan.
The deadline to submit a proposal is November 1, 2016. Proposal
information and documents can be found at
www.arrl.org/hosting-an-ariss-contact.
[ANS thanks ARISS for the above information]
---------------------------------------------------------------------
AMSAT Events
Information about AMSAT activities at other important events around
the country. Examples of these events are radio club meetings where
AMSAT Area Coordinators give presentations, demonstrations of working
amateur satellites, and hamfests with an AMSAT presence (a table with
AMSAT literature and merchandise, sometimes also with presentations,
forums, and/or demonstrations).
*Thursday-Monday, 10-14 November 2016 ? 2106 AMSAT Space Symposium,
Symposium at Sea, on Carnival Liberty, Galveston TX to Cozumel and
return
*Saturday, 12 November 2016 ? Oro Valley Amateur Radio Club Hamfest in
Marana AZ
*Saturday, 3 December 2016 ? Superstition Superfest in Mesa AZ
*Saturday, 14 January 2017 ? Thunderbird Hamfest 2017 in Phoenix AZ
*Saturday, 4 February 2017 ? Palm Springs Hamfest in Palm Springs CA
*Friday-Sunday, 10-12 February 2017 Orlando HamCation in Orlando, FL
*Friday and Saturday, 17-18 February 2017 ? Yuma Hamfest in Yuma AZ
[ANS thanks AMSAT-NA for the above information]
---------------------------------------------------------------------
ARISS News
Successful Contacts
* Howell L. Watkins Middle School, Palm Beach Gardens, Florida
direct via N4J.
The ISS callsign was scheduled to be NA1SS.
The scheduled astronaut is Takuya Onishi KF5LKS
Contact was successful: Mon 2016-10-17 16:08:00 UTC
Right from AOS full quieting!
All 20 questions asked and a farewell by all the students transmitted.
Contact duration 9 mins 30 seconds.
At 16:15 UTC not sure if it was low audio or a signal issue but question 20
had to be repeated. Live streamed over the school network to about 900
students. Media coverage was 2 newspapers and TV station.
There were about 90 students present.
* University of Nebraska's Peter Kiewit Institute, Omaha NE, telebridge
via VK4KHZ.
The ISS callsign was scheduled to be NA1SS.
The scheduled astronaut was Kate Rubins KG5FYJ
Contact was successful: Sat 2016-10-15 14:00:08 UTC 29 deg
This was a JOTA event. An estimate of audience was 5,750. We had 19 of 20
scouts interview Dr. Rubins. The last question was at LOS, but Astronaut
Mike Fossum (who was at the event) answered for Dr. Rubins. There was low
audio from the event, but Shane, VK4KHZ relayed the questions to the ISS.
* Stephen F. Austin Elementary School, Brazosport ISD, Jones Creek,
Texas,
telebridge via VK5ZAI
The ISS callsign was scheduled to be NA1SS.
The scheduled astronaut was Takuya Onishi KF5LKS
Contact was successful: Mon 2016-10-10 16:46:00 UTC
Takuya Onishi answered 24 questions. About 400 students, teachers and
parents were in the audience. Reporters from two small local newspapers
were also in attendance.
Upcoming Contacts
* Istituto Comprensivo ?Marco da Melo?, Mel, Italy, direct via IQ3FL
The ISS callsign is presently scheduled to be OR4ISS.
The scheduled astronaut is Shane Kimbrough KE5HOD.
Contact is presently scheduled for: Sat 2016-11-05 09:32:10 UTC 76 deg
Watch
http://www.ariss.org/upcoming-contacts.html
for information about upcoming contacts as they are scheduled.
[ANS thanks ARISS, Dave, AA4KN, and Charlie, AJ9N for the above information]
---------------------------------------------------------------------
Satellite Shorts From All Over
AMSAT's Around the World
A new link has been created under the AMSAT pull-down tab at
http://www.amsat.org or directly
http://www.amsat.org/?page_id=5618
which list the links to all the other AMSAT's around the world. A webpage
like this was on the old AMSAT site and never got migrated over. A new
webpage
has been created. Check it out!
[ANS thanks Bruce Paige, KK5DO, AMSAT BOD Member for the above information]
---------------------------------------------------------------------
In addition to regular membership, AMSAT offers membership in the
President's Club. Members of the President's Club, as sustaining
donors to AMSAT Project Funds, will be eligible to receive addi-
tional benefits. Application forms are available from the AMSAT
Office.
Primary and secondary school students are eligible for membership
at one-half the standard yearly rate. Post-secondary school students
enrolled in at least half time status shall be eligible for the stu-
dent rate for a maximum of 6 post-secondary years in this status.
Contact Martha at the AMSAT Office for additional student membership
information.
73,
This week's ANS Editor,
Joe Spier, K6WAO
k6wao at amsat dot org
------------------------------
Message: 3
Date: Sat, 22 Oct 2016 23:23:30 -0500
From: "George Henry" <ka3hsw@xxx.xxx>
To: "Mark Johns" <mjohns@xxxxxx.xxx>, "Mark Johns"
<mjohns166@xxxxx.xxx>, "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SatPC32 Doppler problem
Message-ID: <6F152DD01AF3479B89EB2F0F2A8425CD@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="UTF-8";
reply-type=original
How accurate is the time on your computer? If it's not dead on, that can
mess with your doppler correction...
73,
George, KA3HSW
----- Original Message -----
From: "Mark Johns via AMSAT-BB" <amsat-bb@xxxxx.xxx>
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Sent: Saturday, October 22, 2016 3:32 PM
Subject: [amsat-bb] SatPC32 Doppler problem
> For some reason, my SatPC32 has stopped correctly compensating for Doppler
> shift on FO-29. I'm continually having to "find myself" all over the
> passband, making adjustments throughout the pass, just like the old days
> when everything was manual.
>
> I've updated the Keps. I marked the uplink and downlink freqs at time of
> closest approach on a high-elevation pass, and re-edited my Doppler.SQF
> with those numbers.
>
> SatPC32 is talking to the rig, and it does make regular changes to both
> uplink and downlink frequencies -- they just happen not to be correct.
>
> I'm stumped! Any thoughts?--
>
> Mark D. Johns, K?MDJ
> Decorah, Iowa USA EN43
> -----------------------------------------------
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
------------------------------
Message: 4
Date: Sun, 23 Oct 2016 00:04:07 -0500
From: John Toscano <tosca005@xxx.xxx>
To: pedro@xxxxxxxxxx.xxxx
Cc: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] Crossed polarity dual band single feed yagi
Message-ID:
<CABGf72rA=r-NMNrOHcQvSyyKOzd4k-GK=Q=De5c6ureNWrNaoA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
What about putting the VHF elements at a 45 degree angle to the UHF
elements? Say, for example, the VHF elements were vertical and horizontal,
then the UHF elements would be the two diagonals, up-to-the-right and
down-to-the-right. That might help to reduce interference between the two
bands. This would (at least theoretically) allow the VHF and UHF elements
to be interspersed within one another. One VHF feed and one UHF feed could
start at nearly the same boom position, and the second VHF feed could be
spaced 1/4 of the VHF frequency forward, while the second UHF feed could be
spaced 1/4 of the UHF frequency (i.e., about a third as far of a distance)
forward. I suppose it could get pretty crowded on the boom, but it is at
least theoretically possible. I'd be curious to see what a NEC simulation
predicts.
On Thu, Oct 20, 2016 at 9:48 AM, Pedro via AMSAT-BB <amsat-bb@xxxxx.xxx>
wrote:
> Hi Rico,
>
> Thank you for that explanation.
>
> The main problem here is that the original antenna has the UHF elements
> just to help the VHF tune into UHF. It's not a true dual feed VHF/UHF.
> So if I get this concept in circular polarisation it'll always be for the
> VHF leaving UHF to the mercy of a low gain.
>
> The simulation confirms that the gain will bend into an elliptical
> polarisation, but not that significant.
>
> It's tricky alright.
>
> Here are the calculations from 4nec2.
>
> https://dl.dropboxusercontent.com/u/6751494/single_VHF.png
> https://dl.dropboxusercontent.com/u/6751494/single_UHF.png
>
> https://dl.dropboxusercontent.com/u/6751494/3inch_VHF.png
> https://dl.dropboxusercontent.com/u/6751494/3inch_UHF.png
>
> https://dl.dropboxusercontent.com/u/6751494/16inch_VHF.png
> https://dl.dropboxusercontent.com/u/6751494/16inch_UHF.png
>
> 73s Pedro
> CU2ZG
>
>
> Quoting Rico van Genugten <rico.van.genugten@xxxxx.xxx>:
>
> Hi Pedro,
>>
>> I have thought about this subject a lot. How to build an antenna that is
>> single boom, dual band, circularly polarized. I have come to the
>> conclusion
>> that it is pretty difficult due to the following considerations:
>>
>> - To create a circularly polarized antenna a phase shift of 1/4 wl is
>> needed. A phase shift can be obtained through physical distance on the
>> boom, or a difference in feed line length.
>>
>> - When a phase shift of 0 is produced, for instance when the elements are
>> on the same location on the boom and there is no feed line difference, you
>> will end up with a diagonal linear polarized antenna. Think about it: You
>> have two perpendicular linear antennas in the same plane, the resultant
>> will be the summation of the two antennes: a diagonal antenna.
>>
>> - When a phase shift of anything in between 0 and 1/4 wl (or any multiple)
>> is produced, the antenna polarization is somewhere between linear and
>> circular: it will be elliptically polarized. This will mean that it is not
>> completely deaf in one plane like a linear antenna, but will have a gain
>> optimum in a particular plane and a gain minimum in a plane perpendicular
>> to it.
>>
>> - 1/4 wl spacing on UHF is (obviously) not the same as 1/4 wl spacing on
>> VHF, but if you use open-sleeve feeding (2 feed points) there is no way to
>> manipulate either the position on the boom or the feed line difference for
>> VHF and UHF independently
>>
>> - If you use 4 feed points you have full control of the placing of the
>> four
>> antennas on the boom and the feed line differences and are probably able
>> to
>> produce a true single boom, dual band, circularly polarized antenna, but
>> the VHF and UHF antennas will influence each other so strongly that you
>> will probably end up placing the UHF antenna after the last element of the
>> VHF antenna, leaving you with either a very long boom or very little gain.
>>
>> My two cents. :)
>>
>> 73, Rico
>> PA3RVG
>>
>>
>> On Thu, Oct 20, 2016 at 1:16 PM, Pedro via AMSAT-BB <amsat-bb@xxxxx.xxx>
>> wrote:
>>
>> Hi all,
>>>
>>> The best of ham radio is that you can build and experiment.
>>>
>>> My current portable yagi is a dualband single fed (VHF element) home
>>> built, from DK7ZB designs, 4+5 elements version. VHF has 9.25dB gain
>>> 1.03SWR, UHF 8.67dB 1.12SWR.
>>> It works like a charm.
>>>
>>> Now that I'm on the final stages of condo permits for a tower - although
>>> it's a tower on top of the building there are still space limitations -
>>> my
>>> goal is to build a crossed polarity set of my portable antenna. Something
>>> similar to what Gulf Alpha had, but instead of 4 feed points, one for
>>> each
>>> band/polarisation, I'll have only two, combined into one impedance
>>> matched
>>> feed line to the shack.
>>>
>>> Due to the required materials for the feed points and the elements
>>> positions I came up with 2 versions where the vertical antenna is ahead
>>> of
>>> the horizontal by 3 inches and 16 inches. My understanding is that
>>> circular
>>> polarisation would require a specific position for the vertical antenna
>>> plus the proper cable circuit for it.
>>> I'm aware that RHCP would give me a stable signal reception, rather than
>>> my setup even tilted 45 degrees instead of plain horizontal/vertical. I
>>> saw
>>> PU3GUO report on his VHF only antenna while receiving ANDE.
>>>
>>> I've ran the model in 4nec2 for the two options, 145MHz and 435MHz, and
>>> using 5W. Here are my findings.
>>>
>>> 3 inches separation:
>>>
>>> VHF
>>> Both antennas 1.03SWR
>>> Combined gain 9.25dB
>>>
>>> UHF
>>> Both antennas 1.12SWR
>>> Combined gain 8.67dB
>>>
>>> 16 inches separation:
>>>
>>> VHF
>>> Both antennas 1.03SWR
>>> Combined gain 9.24dB
>>>
>>> UHF
>>> Horizontal antenna 1.12SWR; Vertical antenna 1.49SWR
>>> Combined gain 8.27dB
>>>
>>>
>>> My conclusion is that advancing the vertical antenna by so many inches
>>> will result in interference from the horizontal one in such way that the
>>> gain is lower and SWR increases.
>>> Gain in UHF is lower, expected as same happens in my current portable
>>> antenna, and that's because it's being fed in the VHF element.
>>>
>>> Has anyone built something similar that can share any comments?
>>> Would there be any other configuration possible for a single boom?
>>>
>>> Thanks in advance.
>>>
>>> 73s de Pedro
>>> CU2ZG, HM77
>>>
>>>
>>>
>>> --
>>> This message has been scanned for viruses and
>>> dangerous content by MailScanner, and is
>>> believed to be clean.
>>>
>>> _______________________________________________
>>> 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
>>>
>>>
>> --
>> This message has been scanned for viruses and
>> dangerous content by MailScanner, and is
>> believed to be clean.
>>
>
>
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
> _______________________________________________
> 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: Sun, 23 Oct 2016 10:00:40 +0200
From: PE0SAT | Amateur Radio <pe0sat@xxxxx.xx>
To: Mark Johns <mjohns@xxxxxx.xxx>, Mark Johns <mjohns166@xxxxx.xxx>,
Amsat BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SatPC32 Doppler problem
Message-ID: <5f1cd048000867eeed5a2807bf88e559@xxxxx.xx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hello Mark,
Make sure location, time, summer/winter time and time zone are correct.
73 Jan PE0SAT
On 22-10-2016 22:32, Mark Johns via AMSAT-BB wrote:
> For some reason, my SatPC32 has stopped correctly compensating for
> Doppler shift on FO-29. I'm continually having to "find myself" all
> over the passband, making adjustments throughout the pass, just like
> the old days when everything was manual.
>
> I've updated the Keps. I marked the uplink and downlink freqs at time
> of closest approach on a high-elevation pass, and re-edited my
> Doppler.SQF with those numbers.
>
> SatPC32 is talking to the rig, and it does make regular changes to
> both uplink and downlink frequencies -- they just happen not to be
> correct.
>
> I'm stumped! Any thoughts?--
>
> Mark D. Johns, K?MDJ
> Decorah, Iowa USA EN43
> -----------------------------------------------
> "Heaven goes by favor; if it went by merit,
> you would stay out and your dog would go in."
> ---Mark Twain
> _______________________________________________
> 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
--
With regards PE0SAT
Internet web-page http://www.pe0sat.vgnet.nl/
DK3WN SatBlog http://www.dk3wn.info/p/
irc://chat.freenode.net #Cubesat - Twitter @xxxxxx
------------------------------
Message: 6
Date: Sun, 23 Oct 2016 12:36:17 +0200
From: Erich Eichmann <erich.eichmann@xxxxxxxx.xx>
To: AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] SatPC32 Doppler problem
Message-ID: <c9fc065e-ce31-a956-44d9-cce13fe02e59@xxxxxxxx.xx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hello Mark,
try the following:
Track a FO-29 pass and find your signal using the "Upl. Corr." up/down
controls in menu "CAT". Fine tune the uplink for best audio (best around
the middle of the pass). Then click the "Change/Store Data File" in
menu "CAT" and in the little window that opens click on "Upl.
Correction". That will save the correct uplink frequency. That is easier
and more reliable than to enter observed frequencies manually in
Doppler. SQF.
At the next program start you should immediately hear your signal.
Little deviations (100 ... 300 Hz) may remain due to temperature
differences at the sat or the radio. You can easily correct them using
the ? keys of the numerical pad with a few hits in steps of 100 Hz. (The
keys work only if SatPC32 must be the active program - blue header line).
73s, Erich, DK1TB
Am 22.10.2016 um 22:32 schrieb Mark Johns via AMSAT-BB:
> For some reason, my SatPC32 has stopped correctly compensating for Doppler
shift on FO-29. I'm continually having to "find myself" all over the
passband, making adjustments throughout the pass, just like the old days
when everything was manual.
>
> I've updated the Keps. I marked the uplink and downlink freqs at time of
closest approach on a high-elevation pass, and re-edited my Doppler.SQF with
those numbers.
>
> SatPC32 is talking to the rig, and it does make regular changes to both
uplink and downlink frequencies -- they just happen not to be correct.
>
> I'm stumped! Any thoughts?--
>
> Mark D. Johns, K?MDJ
> Decorah, Iowa USA EN43
> -----------------------------------------------
> "Heaven goes by favor; if it went by merit,
> you would stay out and your dog would go in."
> ---Mark Twain
> _______________________________________________
> 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: Sun, 23 Oct 2016 09:55:37 -0500
From: Joe <nss@xxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Software Problems
Message-ID: <bccf5e53-c170-6e2c-9a8f-3ebacce8db8b@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
I am really excited about getting back on the Birds after a 40+ year
absence.
I've done EME, MS, AU, and all sorts of weak signal stuff on 144Mhz.
I've played the DX and contesting on HF.
All has been fun, but none except for the EME has given the most
happiness than the memories of playing with the birds in the late 70's
Now let me know, I can take this off list if members here want me to,
But This excitement is quickly turning into disgust. To the point I'm
just about to say screw it and forget about Sat work again.
I am in the need of help with prediction programs.
Man in the late 70's it was the ARRL bulletin with keps etc. and a Oscar
Locator.
Now we got ultra cool software programs that all are incredible! Except
for me, I can not trust ANY of them. I have been testing several to see
what I will make my primary program. BUT...... and there always is a
"BUT" isn't there? I can not say what one to "Trust"
The four I have installed are...
SatLookDown1_28
HRDSatTrack
Orbitron
SatPC32
Now of course they all use the same computer clock. And it is accurate
to less than a tenth of a second.
Each one periodically ask to Up-Date the TLE's and I say "YES" and let
them do it all on their own. I change NOTHING on where they get their data.
The run them.
The,
SatLookDown1_28 & HRDSatTrack, both agree very closely. Almost to the
second.
But the Orbitron, is off, WAY off. like 15 minutes off.
And the SatPC32 is even worse the sat is like 1/2 an orbit off!
Now the ones that agree also match the page
http://www.amsat.org.ar/pass.htm#
So my guess they are the ones showing correct data.
Now what to do about the other two. How can I make them show correct passes?
Remember I can take this off list if no one wants to read about this...
Just let me know,
Joe WB9SBD
--
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
------------------------------
Message: 8
Date: Sun, 23 Oct 2016 15:25:30 +0000
From: Graham <planophore@xxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Software Problems
Message-ID: <48919924-854d-d6db-f341-0c6d992e3740@xxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Joe,
I feel your pain.
Back in the Oscar 7/8 and RS10 (et al) days, all I had was a simple
program written in BASIC for which I had to manually update the element
sets and which only provided a prediction rather than a "real time"
view. It all seemed so much simpler and to some degree more satisfying.
Skip forward 35 to 40 years and we have all these wonderful near real
time "ultra cool software programs", multiple computer platforms and
operating systems (Windows, Apple OS, Linux, Android) and the choices
are many, the learning curve can be steep, and it is easy to get frustrated.
From your list I have only first hand experience with Orbitron. The one
I decided on is not in your list - GPREDICT.
I quickly settled on GPREDICT because to me at least it was intuitive
and useable on at least Windows and LINUX. Generally I leave it running
on a Raspberry Pi 3 and a dedicated monitor showing the various Amateur
and Weather satellites in which I have an interest. Predictions are
always spot on. I typically hear whatever satellite I am waiting for
within a few seconds of the indicated AOS.
To be fair, I also have own GPS disciplined NTP time server which serves
precise time to all of my networked computers plus I run NTP on each
computer on the network. I check them regularly to unsure that all are
correct.
Keeping you computer's time correct is the first hurdle. Having the
correct time to the a couple of seconds is more than adequate in this
case and if you have in interest in something like WSPR then within a
second is usually sufficient.
The next hurdle is to get your latitude, longitude, and altitude set
correctly in the program of your choice. Latitude and longitude need to
have the correct quadrant be it specified as N S E or W or + for N, -
for S, - for W, and + for E, and as precise as you can. But this you
already know given your experience with the other modes you have listed.
Altitude is also important but needn't be that precise but ensuring the
right units is, i.e. ft or meters as required by the program. But again,
I think you are already aware of this. I am just being complete in my reply.
Once all of your configurations are set correctly, I can't see these
programs all giving different answers. It is possible but the
underlying math is pretty much all the same for each of the programs.
cheers, Graham ve3gtc
On 2016-10-23 14:55, Joe wrote:
> I am really excited about getting back on the Birds after a 40+ year
> absence.
> I've done EME, MS, AU, and all sorts of weak signal stuff on 144Mhz.
> I've played the DX and contesting on HF.
> All has been fun, but none except for the EME has given the most
> happiness than the memories of playing with the birds in the late 70's
>
> Now let me know, I can take this off list if members here want me to,
> But This excitement is quickly turning into disgust. To the point I'm
> just about to say screw it and forget about Sat work again.
>
> I am in the need of help with prediction programs.
>
> Man in the late 70's it was the ARRL bulletin with keps etc. and a
> Oscar Locator.
>
> Now we got ultra cool software programs that all are incredible!
> Except for me, I can not trust ANY of them. I have been testing
> several to see what I will make my primary program. BUT...... and
> there always is a "BUT" isn't there? I can not say what one to "Trust"
> The four I have installed are...
> SatLookDown1_28
> HRDSatTrack
> Orbitron
> SatPC32
>
> Now of course they all use the same computer clock. And it is accurate
> to less than a tenth of a second.
>
> Each one periodically ask to Up-Date the TLE's and I say "YES" and let
> them do it all on their own. I change NOTHING on where they get their
> data.
>
> The run them.
>
> The,
> SatLookDown1_28 & HRDSatTrack, both agree very closely. Almost to the
> second.
>
> But the Orbitron, is off, WAY off. like 15 minutes off.
>
> And the SatPC32 is even worse the sat is like 1/2 an orbit off!
>
> Now the ones that agree also match the page
>
> http://www.amsat.org.ar/pass.htm#
>
> So my guess they are the ones showing correct data.
>
> Now what to do about the other two. How can I make them show correct
> passes?
>
> Remember I can take this off list if no one wants to read about this...
> Just let me know,
>
> Joe WB9SBD
------------------------------
Message: 9
Date: Sun, 23 Oct 2016 11:38:59 -0400
From: w4upd <w4upd@xxx.xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Software Problems
Message-ID: <580CD993.7090202@xxx.xx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I run most of those programs without any problems. I even run old
Instantrak under DosBox, and WISP32. This all runs on a 64-bit Laptop
Windows 10 system. SatPC32 needs to have the correct coordinates put in.
You have to make sure that the longitude and latitude are the correct
polarity as well. On WISP32 I merely have to make sure they are
west/east or north/south.
I would definitely check your system time and date as well as QTH
settings. Insure the time displayed is correct based on your settings in
regards to local or UTC. I find that all of my programs come within
seconds are less of each other for tracking.
Reid. W4UPD
On 10/23/2016 10:55 AM, Joe wrote:
> I am really excited about getting back on the Birds after a 40+ year
> absence.
> I've done EME, MS, AU, and all sorts of weak signal stuff on 144Mhz.
> I've played the DX and contesting on HF.
> All has been fun, but none except for the EME has given the most
> happiness than the memories of playing with the birds in the late 70's
>
> Now let me know, I can take this off list if members here want me to,
> But This excitement is quickly turning into disgust. To the point I'm
> just about to say screw it and forget about Sat work again.
>
> I am in the need of help with prediction programs.
>
> Man in the late 70's it was the ARRL bulletin with keps etc. and a
> Oscar Locator.
>
> Now we got ultra cool software programs that all are incredible!
> Except for me, I can not trust ANY of them. I have been testing
> several to see what I will make my primary program. BUT...... and
> there always is a "BUT" isn't there? I can not say what one to "Trust"
> The four I have installed are...
> SatLookDown1_28
> HRDSatTrack
> Orbitron
> SatPC32
>
> Now of course they all use the same computer clock. And it is accurate
> to less than a tenth of a second.
>
> Each one periodically ask to Up-Date the TLE's and I say "YES" and let
> them do it all on their own. I change NOTHING on where they get their
> data.
>
> The run them.
>
> The,
> SatLookDown1_28 & HRDSatTrack, both agree very closely. Almost to the
> second.
>
> But the Orbitron, is off, WAY off. like 15 minutes off.
>
> And the SatPC32 is even worse the sat is like 1/2 an orbit off!
>
> Now the ones that agree also match the page
>
> http://www.amsat.org.ar/pass.htm#
>
> So my guess they are the ones showing correct data.
>
> Now what to do about the other two. How can I make them show correct
> passes?
>
> Remember I can take this off list if no one wants to read about this...
> Just let me know,
>
> Joe WB9SBD
------------------------------
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 343
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