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CX2SA > SATDIG 30.10.18 19:24l 866 Lines 30172 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: AO-85 question (Ryan Noguchi)
2. Re: AO-85 question (Fernando Ramirez)
3. Re: Portable, Full-Duplex Transceiver (Ken M)
4. Amazon Smile now contributing 5% to your favorite charity
(through 2 November) (Alan)
5. Re: HF Satellites (Pavel Milanes Costa)
6. S band satellite (Jim White)
7. Re: S band satellite (Zach Leffke)
8. Upcoming ARISS contact with Pathfinder Regional Vocational
Technical High School, Palmer, MA (n4csitwo@?????????.????
9. Re: HF Satellites (Scott)
10. Re: S band satellite (Jim White)
----------------------------------------------------------------------
Message: 1
Date: Tue, 30 Oct 2018 04:33:13 +0000 (UTC)
From: Ryan Noguchi <ai6do@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] AO-85 question
Message-ID: <1380318052.18817222.1540873993421@????.?????.???>
Content-Type: text/plain; charset=UTF-8
AO-85 is a little deaf, so it's harder to get into than the other FM birds.
As a result, it gets less traffic. It is workable with an HT and handheld
beam, just not as easily.?
The VHF and UHF antennas on the Fox-1 series aren't orthogonal, so with the
Arrow you often will get better results by twisting the antenna 90 degrees
between transmitting and receiving.?The other FM birds aren't nearly as
sensitive to polarization mismatch.?
I find that AO-85's AFC is less forgiving than AO-91 or AO-92, which makes
good Doppler correction timing--relative to the nominal uplink frequency of
435.172, not .170--more important for best results.?I also find a PL tone of
69.3 to be more reliable than 67.0, particularly on the second half of the
pass; I got that tip from Patrick WD9EWK.?
73, Ryan AI6DO
On Monday, October 29, 2018, 7:19:36 AM PDT, skristof@???????.???
<skristof@???????.???> wrote:
Lately, I've been trying other FM satellites besides SO-50. I have made
contacts on AO-92, but I can't get anything from AO-85.
On AO-85 I can hear the voice ID of the satellite plain as day, but I
never hear any other hams trying to make contacts and I can't seem to
get into the satellite.?
My set up is two Baofeng handhelds and an Arrow antenna. This set up
works fine on SO-50 and AO-92 so I know that it works.
For AO-85 I'm using 435.170 for the uplink and 145.980 for the downlink.
I have the uplink sending the 67.0 Hz tone.
So, what am I missing? Constructive tips would be very much appreciated.
Steve AI9IN
------------------------------
Message: 2
Date: Mon, 29 Oct 2018 21:47:09 -0700
From: Fernando Ramirez <framirezferrer@?????.???>
To: skristof@???????.???
Cc: AMSAT -BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] AO-85 question
Message-ID:
<CAGHXx8i=K6=QRL-bQcXkEkD3+ne2g5Scyow0trc7-3jz_30ZPA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Steve, AO-85 can be a bit harder to work with an HT but it's doable. I
started making QSOs with a UV-5R half duplex and an Arrow antenna. IMHO the
best chances are on descending passes or after the first quarter of an
ascending pass. Passes above 20? work the best.
My longest distance on AO-85 was 5282 km with FG8OJ in Guadeloupe using a
UV-B5 to transmit and a FT-817 as the receiver. I was using the Arrow
during that 2? pass.
Try twisting the antenna to match the satellite RX polarization.
Figuratively speaking, of course :-)
Best of luck!
Fernando
NP4JV
On Mon, Oct 29, 2018, 7:19 AM <skristof@???????.??? wrote:
> Lately, I've been trying other FM satellites besides SO-50. I have made
> contacts on AO-92, but I can't get anything from AO-85.
>
> On AO-85 I can hear the voice ID of the satellite plain as day, but I
> never hear any other hams trying to make contacts and I can't seem to
> get into the satellite.
>
> My set up is two Baofeng handhelds and an Arrow antenna. This set up
> works fine on SO-50 and AO-92 so I know that it works.
>
> For AO-85 I'm using 435.170 for the uplink and 145.980 for the downlink.
> I have the uplink sending the 67.0 Hz tone.
>
> So, what am I missing? Constructive tips would be very much appreciated.
>
>
> Steve AI9IN
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 3
Date: Tue, 30 Oct 2018 00:14:16 +0000
From: Ken M <va7kbm@???????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Portable, Full-Duplex Transceiver
Message-ID:
<DM5PR0101MB3084C03F1B53EEC98367CF3A98CC0@???????????????.????.????????????.??
?>
Content-Type: text/plain; charset="utf-8"
Hi Ron,
I too am relatively new to this (and not enough time to pursue it). So
far I have just done some FM satellite work with an FT-60R and an 817
(two radios for full-duplex) along with an Arrow antenna. I'm thinking
about saving my pennies for an 818 to go with my 817 for two-radio
linear satellite operation - or I may just use an SDR for my downlink
radio - we'll see. Like you I've thought about an 857 as a second radio
- not so much for satellite use but for higher power HF field use -
again, we'll see.
As to rotators, this Australian school group has some interesting
rotator projects for the DIY'er. I have not tried to build one yet but
the projects look approachable. They have other interesting radio
projects as well.
http://www.sarcnet.org/projects.html
I have also become interested in omni-directional satellite antennas
like lindenblad, turnstile, or helical and I may try building one of
these (which I suspect are much better at receiving than transmitting,
especially at low power). There are lots of plans on the Internet.
73
Ken VA7KBM
On 2018-10-29 3:02 PM, ronald mosher wrote:
> A very sincere thank you to all who replied to my post (below). The many
> thoughtful responses have caused me to stop searching for a nonexistent
> radio and to concentrate on realistic options. I am now focused on
> evaluating the FT818 and FT857. The 818 looks like a good choice, but the
> 857 provides a power boost that is useful on HF in current band conditions.
> Offsetting, the 857 draws a huge current and I'm not relishing the battery
> weight that entails. I'm heading over to HRO soon to operate both radios
> side-by-side just to see how I like the relative feel.
>
> I also appreciate the advice to keep things simple, especially for portable
> operation. I will take that to heart.
>
> I'm learning a lot just reading the posts on this reflector. Your help is
> very much appreciated.
> Ron K0PGE
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of ronald mosher
> Sent: Wednesday, October 24, 2018 9:59 AM
> To: amsat-bb@?????.???
> Subject: [amsat-bb] Portable, Full-Duplex Transceiver
>
> I am new to satellite communication and this is my first post. My setup so
> far includes an Arrow antenna on a camera tripod, an SDR (RSP) and SatPC32
> software on a Surface Pro. I would like to buy a portable, HF/VHF/UHF,
> Full-Duplex transceiver that I can use for both portable HF QRP and for
> satellite work. So far, I have not been able to find such a radio. Any
> recommendations would be much appreciated.
>
>
>
> Also, I would like to buy or build an AZ-EL rotator that is suitable for a
> portable setup. I am leaning toward building as a less expensive
> alternative. I have been studying the WRAPS version by WA8SME and the Mini
> Mk-2 by VK3FOWL and VK3YSP. Both look to be of about equal construction
> complexity. Any thoughts on either if these rotators, or any other
> inexpensive rotator would also be very much appreciated.
>
>
>
> It is exciting to be learning a new phase of ham radio and to be a part of
> this group. Thank you for any suggestions.
>
> 73,
>
> Ron K0PGE
>
> _______________________________________________
> 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: http://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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Tue, 30 Oct 2018 05:49:16 -0500
From: "Alan" <wa4sca@?????.???>
To: <amsat-bb@?????.???>
Subject: [amsat-bb] Amazon Smile now contributing 5% to your favorite
charity (through 2 November)
Message-ID: <000001d4703e$34dc40c0$9e94c240$@?????.???>
Content-Type: text/plain; charset="us-ascii"
Amazon Smile is running a special, through 2 November, where they give 5% of
your purchase to the charity you have registered. You HAVE registered
AMSAT, right?! This is 10X the normal .5%, so it might be a good time to
purchase those big ticket items you have been wanting.
73,
Alan
WA4SCA
-----------------------------------
The prospect of domination of the
nation's scholars by Federal employment,
project allocations, and the power of money
is ever present - and is gravely to be
regarded.
President Dwight D. Eisenhower
------------------------------
Message: 5
Date: Tue, 30 Oct 2018 09:21:21 -0400
From: Pavel Milanes Costa <pavelmc@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] HF Satellites
Message-ID: <2be08e9d-2a59-6c67-b0fa-7c6c9bb99a92@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Yes...
I'm looking for your mentioned articles on ARRL archives ASAP, thanks
for the tip.
With 15m up and 10m down, I'm wondering to the collective mind in ammsat-bb:
What would be the best antennas (both ways)? ground planes? verticals?
inverted V? etc?
Cheers Pavel CO7WT.
El 27/10/18 a las 16:45, 2 via AMSAT-BB escribi?:
> Interest in planned satellites carrying 10 and 15 meter transponders is
growing steadily, owing in large part to the DX possibilities these
satellites will open.
>
>
> The best source I know of for information about propagation from such
satellites is the Space Radio Handbook, by the late John Branigan, GM4IHJ
(SK), published by RSGB. Unfortunately, this book is out of print and may
be difficult to find.
>
>
> November QST arrived several days ago. As always, I turned to the monthly
column describing the contents of QST 25, 50 and 75 years ago. Was I
surprised! In the "50 Years Ago" section, about November 1968 QST, was an
article I had written, about which I had totally forgotten in the
intervening 50 years.
>
>
> It was called "Antipodal Reception of Satellite Signals," discussing what
was then known about such things and proposing an experiment to be carried
out using the 10 meter beacon to be carried on OSCAR-Australis, the name of
which was changed to Australis-OSCAR 5 after its launch in 1970.
>
>
> Readers of that article will also want to read the results of the AO-5
propagation experiments, which I presented in October 1970 QST. You will
find these articles in the QST archive on ARRL's Web site, under my call
sign at the time, K2QBW. Unfortunately, copyright laws prevent my attaching
them here.
>
>
> I turned out to be in very good company. Also researching in this field
at the time were Dr. Owen Garriott. W5LFL, later to be the first US ham in
space, and Dr. O. G. (Mike) Villard, Jr., W6QYT (SK), an early pioneer of
SSB. Both were then at Stanford University.
>
>
> 73 Ray W2RS
>
>
>
>
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Tue, 30 Oct 2018 10:06:52 -0600
From: Jim White <jim@?????????????????.???>
To: AMSAT-BB <amsat-bb@?????.???>, "'Craig Kief (COSMIAC)'"
<Craig.kief@???????.???>
Subject: [amsat-bb] S band satellite
Message-ID:
<3dafd502-af8f-d5aa-a2ff-bdceb8a24a2f@?????????????????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
I'm working with a university that has a new 4 meter S band dish they
are trying to test out.? Can anyone recommend a satellite they know is
transmitting in the 2200 to 2300Mhz band?? Geo or LEO as long as it's
transmitting. Any modulation; we are using a spectrum analyzer to detect
the signals.
Thanks,
Jim
jim.white@?????????????????.???
wd0e@?????.???
------------------------------
Message: 7
Date: Tue, 30 Oct 2018 12:27:30 -0400
From: Zach Leffke <zleffke@??.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] S band satellite
Message-ID: <b49a1499-f564-9f77-9e37-fb834f06386b@??.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Jim,
I've used the Sirius Satellites to calibrate my pointing for S-Band, but
its a bit higher around 2340 MHz.? Sirius FM-5 was pretty active, from
some old notes I have strong tones (beacons?) documented at 2341.481 MHz
and 2341.495 MHz (#s are 'ish', may need to tune a bit).
For the 2200-2300 band I've had some luck with the GOES satellites.? I
have a narrowband signal documented at 2209.086 MHz off GOES-15.
For LEO, the active NOAA birds usually have S-Band telemetry as well.?
NOAA-15, NOAA-18, and NOAA-19 should all work (NOAA-18/19 for sure, 15
might not always be on).? Sometimes the 'telemetry' is un-modulated so
just a nice clean tone that you can easily see following the Doppler
S-curve.
You can also try pointing at the moon and see if you can pick up the
Lunar Reconnaisance Orbiter.? Thats probably more for 'funnsies' though.
My usual procedure is to calibrate pointing against a GEO bird to peak
up and fine tune the pointing angles, then autotrack a LEO bird to make
sure everything is behaving.
My notes are a couple years old, so things may have changed.? So below
are some links that you can use to maybe hunt something down.
https://www.wmo-sat.info/oscar/satellitefrequencies
https://uhf-satcom.com/satellite-reception/s-band
http://wiki.oz9aec.net/index.php/Receiving_LRO_and_LCROSS? (for the LRO
attempt)
Hope this helps, good hunting!
73s,
Zach, KJ4QLP
Research Associate
Aerospace Systems Lab
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
On 10/30/2018 12:06 PM, Jim White wrote:
> I'm working with a university that has a new 4 meter S band dish they
> are trying to test out.? Can anyone recommend a satellite they know is
> transmitting in the 2200 to 2300Mhz band?? Geo or LEO as long as it's
> transmitting. Any modulation; we are using a spectrum analyzer to
> detect the signals.
>
> Thanks,
>
> Jim
> jim.white@?????????????????.???
> wd0e@?????.???
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Tue, 30 Oct 2018 12:38:09 -0400
From: <n4csitwo@?????????.???>
To: <amsat-bb@?????.???>, <ariss-press@?????.???>
Subject: [amsat-bb] Upcoming ARISS contact with Pathfinder Regional
Vocational Technical High School, Palmer, MA
Message-ID: <4A4057498CFE403FACC612BAA1F560F7@???>
Content-Type: text/plain; charset="iso-8859-1"
An International Space Station school contact has been planned with
participants at Pathfinder Regional Vocational Technical High School,
Palmer, MA on 02 Nov. The event is scheduled to begin at approximately 14:50
UTC. The duration of the contact is approximately 9 minutes and 30 seconds.
The contact will be direct between NA1SS and KB1MDS. The contact should be
audible over the state of Massachusetts and adjacent areas. Interested
parties are invited to listen in on the 145.80 MHz downlink. The contact is
expected to be conducted in English.
This ARISS Project has become a school-wide endeavor here at Pathfinder
capitalizing on our students' interests in the trades and STEM subjects and
giving them an interdisciplinary opportunity to apply their various skill
sets. We have incorporated many of the technical areas to construct the
radio station and prepare for the ARISS Contact and challenged our students
to learn more about wireless technology and radio science. Many shops were
directly involved, including Advanced Manufacturing, Auto Body, Business
Technologies, CAD, Electrical, Electronics, HVAC/R, Programming and Web and
many of the academic courses have been involved including the History, Math,
and Science Departments. Students have helped build the radio station,
advertise the event, solicit and narrow down questions for the astronauts,
and document the entire process on the Web. Academic teachers have also
incorporated the ARIIS project into their curriculums creating an engaging
educational opportunity for the
school. All involved have had the chance to learn more about space
exploration, technology, and communications. This project has also become an
opportunity for engagement with the larger community through work with local
businesses, media, and amateur radio clubs. All of this work by the various
stakeholders has led to this once in a lifetime opportunity for our all
involved.
Participants will ask as many of the following questions as time allows:
1. Our bodies are used to living with the force of gravity, how does living
in micro-gravity affect the human body?
2. How has seeing Earth from space impact your view on the world?
3. With the amount of heat generated on the ISS, how do you dissipate heat
into space when heat transfer through a vacuum is poor?
4. How often do you refuel the propulsion system and what is the fuel?
5. If you need to manufacture a part or tool on the ISS, how is this
accomplished? Do you have any machines such as 3D-printers, mills, or
drills to assist you?
6. After reaching a professional goal of space travel, what piece of advice
could you share with high school students who are navigating toward their
future?
7. Do you generate enough electricity to power everything on the ISS and if
not, how do you compensate for the lack of power generated? How do you
manage excess generated power?
8. Working with a number of nations, is there a uniform set of rules that
guide activities and projects on ISS?
9. How difficult is it to readjust from living in space somewhat isolated for
6 months in a micro gravity environment to living on Earth?
10. How do you prevent/monitor space debris from coming in contact with the
ISS, and in the event of a space debris collision how do you fix the
outside of the space station?
11. The temperature difference can be over 300 degrees different from the
sunny side of the ISS to the shaded side, why do we not use thermal
generators?
12. What kinds of experiments that are difficult or impossible on Earth are
best suited to the microgravity on the Space Station?
13. When the ISS is facing the Sun, the sunlight side is at about 120 degrees
Celsius, and the other side is at about -160 degrees Celsius. How do you
thermoregulate the inside of the Station between these extremes,
considering that there is no thermal convection in the microgravity
environment?
14. Do you see a geotropic response from plants?
PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES:
Visit ARISS on Facebook. We can be found at Amateur Radio on the
International Space Station(ARISS).
To receive our Twitter updates, follow @????????????
Next planned event(s):
1. Bishop O'Connell High School, Arlington, VA, telebridge via W6SRJ
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Serena Aunon-Chancellor KG5TMT
Contact is a go for: Thu 2018-11-08 15:56 UTC
About ARISS:
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 informa
tion, see www.ariss.org, www.amsat.org, and www.arrl.org.
Thank you & 73,
David - AA4KN
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
------------------------------
Message: 9
Date: Tue, 30 Oct 2018 09:45:39 -0700
From: Scott <ka7fvv@?????.???>
To: Pavel Milanes Costa <pavelmc@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] HF Satellites
Message-ID: <BAEF5C76-0121-458C-91AA-02F791DEFA53@?????.???>
Content-Type: text/plain; charset=utf-8
Pavel,
Years ago when there were Russian RS satellites that used these modes I used
an HF vertical very successfully. Here is a link to an old how to for the
RS satellites. Interesting reading, brings back memories of the ols sat ops.
https://www.qsl.net/kd4cga/howtos.htm
73. Scott, KA7FVV
Director - KBARA kbara.org
Alternate Board of Director - AMSAT amsat.org
Co-Owner WA7DRE 443.525 System Fusion Repeater
Co-Owner KA7FVV 147.320 KBARA Repeater
www.ka7fvv.net
> On Oct 30, 2018, at 06:21, Pavel Milanes Costa <pavelmc@?????.???> wrote:
>
> Yes...
>
> I'm looking for your mentioned articles on ARRL archives ASAP, thanks for
the tip.
>
> With 15m up and 10m down, I'm wondering to the collective mind in ammsat-bb:
>
> What would be the best antennas (both ways)? ground planes? verticals?
inverted V? etc?
>
> Cheers Pavel CO7WT.
>
>> El 27/10/18 a las 16:45, 2 via AMSAT-BB escribi?:
>> Interest in planned satellites carrying 10 and 15 meter transponders is
growing steadily, owing in large part to the DX possibilities these
satellites will open.
>>
>>
>> The best source I know of for information about propagation from such
satellites is the Space Radio Handbook, by the late John Branigan, GM4IHJ
(SK), published by RSGB. Unfortunately, this book is out of print and may
be difficult to find.
>>
>>
>> November QST arrived several days ago. As always, I turned to the
monthly column describing the contents of QST 25, 50 and 75 years ago. Was
I surprised! In the "50 Years Ago" section, about November 1968 QST, was an
article I had written, about which I had totally forgotten in the
intervening 50 years.
>>
>>
>> It was called "Antipodal Reception of Satellite Signals," discussing what
was then known about such things and proposing an experiment to be carried
out using the 10 meter beacon to be carried on OSCAR-Australis, the name of
which was changed to Australis-OSCAR 5 after its launch in 1970.
>>
>>
>> Readers of that article will also want to read the results of the AO-5
propagation experiments, which I presented in October 1970 QST. You will
find these articles in the QST archive on ARRL's Web site, under my call
sign at the time, K2QBW. Unfortunately, copyright laws prevent my attaching
them here.
>>
>>
>> I turned out to be in very good company. Also researching in this field
at the time were Dr. Owen Garriott. W5LFL, later to be the first US ham in
space, and Dr. O. G. (Mike) Villard, Jr., W6QYT (SK), an early pioneer of
SSB. Both were then at Stanford University.
>>
>>
>> 73 Ray W2RS
>>
>>
>>
>>
>> _______________________________________________
>> 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: http://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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Tue, 30 Oct 2018 11:10:27 -0600
From: Jim White <jim@?????????????????.???>
To: Zach Leffke <zleffke@??.???>, AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] S band satellite
Message-ID:
<e2759b53-c839-d3f3-cf44-22b6ce0fdcec@?????????????????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Thanks much Zach.? I've passed this on and the guys will see if they can
see some of those today.
Very helpful.
Jim
On 10/30/2018 10:27 AM, Zach Leffke wrote:
> Hi Jim,
>
> I've used the Sirius Satellites to calibrate my pointing for S-Band,
> but its a bit higher around 2340 MHz.? Sirius FM-5 was pretty active,
> from some old notes I have strong tones (beacons?) documented at
> 2341.481 MHz and 2341.495 MHz (#s are 'ish', may need to tune a bit).
>
> For the 2200-2300 band I've had some luck with the GOES satellites.? I
> have a narrowband signal documented at 2209.086 MHz off GOES-15.
>
> For LEO, the active NOAA birds usually have S-Band telemetry as well.?
> NOAA-15, NOAA-18, and NOAA-19 should all work (NOAA-18/19 for sure, 15
> might not always be on).? Sometimes the 'telemetry' is un-modulated so
> just a nice clean tone that you can easily see following the Doppler
> S-curve.
>
> You can also try pointing at the moon and see if you can pick up the
> Lunar Reconnaisance Orbiter.? Thats probably more for 'funnsies' though.
>
>
> My usual procedure is to calibrate pointing against a GEO bird to peak
> up and fine tune the pointing angles, then autotrack a LEO bird to
> make sure everything is behaving.
>
>
> My notes are a couple years old, so things may have changed.? So below
> are some links that you can use to maybe hunt something down.
>
> https://www.wmo-sat.info/oscar/satellitefrequencies
>
> https://uhf-satcom.com/satellite-reception/s-band
>
> http://wiki.oz9aec.net/index.php/Receiving_LRO_and_LCROSS? (for the
> LRO attempt)
>
>
>
> Hope this helps, good hunting!
>
> 73s,
>
> Zach, KJ4QLP
>
>
> Research Associate
> Aerospace Systems Lab
> Ted & Karyn Hume Center for National Security & Technology
> Virginia Polytechnic Institute & State University
> Work Phone: 540-231-4174
> Cell Phone: 540-808-6305
>
> On 10/30/2018 12:06 PM, Jim White wrote:
>> I'm working with a university that has a new 4 meter S band dish they
>> are trying to test out.? Can anyone recommend a satellite they know
>> is transmitting in the 2200 to 2300Mhz band?? Geo or LEO as long as
>> it's transmitting. Any modulation; we are using a spectrum analyzer
>> to detect the signals.
>>
>> Thanks,
>>
>> Jim
>> jim.white@?????????????????.???
>> wd0e@?????.???
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