Date   

QSL Card from the ISS

Clint Bradford
 

Don't forget: You qualify for the gorgeous ISS QSL card by merely hearing signals from the ISS! Details on the SSTV page at Work-Sat.com
 


Re: Arrow antenna rotor?

Jerry Rappel
 

Thanks - What pan tilt head are you using?


On Sat, Nov 27, 2021 at 2:02 PM Jerry Rappel via groups.io <ww0ejar=gmail.com@groups.io> wrote:
Thanks to all.

Jerry

On Sat, Nov 27, 2021 at 10:29 AM Max Becker <maxheadspace@...> wrote:
Agree, I don’t get many 90 degree passovers, and as stated, the broad width of the antenna will get you close enough. I have a similar camera pan/tilt that doesn’t go up to even 70 degrees. I’m designing a 3D print model to connect the antenna at like a 30 degree down angle, so when the camera mount is -30 degrees my antenna is 0 degrees - level. Then if I tilt up the camera mount to +30 degrees, my antenna will actually be oriented +60 degrees. Not sure if I’m making sense. 


Re: Arrow antenna rotor?

Jerry Rappel
 

Thanks to all.

Jerry

On Sat, Nov 27, 2021 at 10:29 AM Max Becker <maxheadspace@...> wrote:
Agree, I don’t get many 90 degree passovers, and as stated, the broad width of the antenna will get you close enough. I have a similar camera pan/tilt that doesn’t go up to even 70 degrees. I’m designing a 3D print model to connect the antenna at like a 30 degree down angle, so when the camera mount is -30 degrees my antenna is 0 degrees - level. Then if I tilt up the camera mount to +30 degrees, my antenna will actually be oriented +60 degrees. Not sure if I’m making sense. 


Re: Arrow antenna rotor?

Max Becker
 

Agree, I don’t get many 90 degree passovers, and as stated, the broad width of the antenna will get you close enough. I have a similar camera pan/tilt that doesn’t go up to even 70 degrees. I’m designing a 3D print model to connect the antenna at like a 30 degree down angle, so when the camera mount is -30 degrees my antenna is 0 degrees - level. Then if I tilt up the camera mount to +30 degrees, my antenna will actually be oriented +60 degrees. Not sure if I’m making sense. 


Re: Arrow antenna rotor?

mchenryproj
 

Consider the 3dB beam width of the antenna. You likely would not gain much by trying to get to a full 90°.

For example, the 3dB beam width of my EME antenna I have used is 16°.  It's a 45 element 1296 antenna. I can be "on the moon" anywhere in that 16° arc so I would not need to hit 90° but can do with 74° max elevation angle.

Most smaller antennas have a wider beam width.  I don't know if the arrow has a published one or not but as long as you get the Az correct you may not need to worry so much about pointing exactly at the target.

Just a thought.  Sometimes we over engineer things.

Sean
KB8JNE
EN80qc


Arrow antenna rotor?

Jerry Rappel
 

I believe it says Tilt Angle:70 degrees, I could compensate to 90 degrees by adjusting the tripod head ?




Jerry WW0E


Re: Groups io

fejohnso
 

email confirmed.

On Friday, November 26, 2021, 08:57:42 PM EST, Eric Christian <christian.eric41@...> wrote:


Confirm email
--


Groups io

Eric Christian <christian.eric41@...>
 

Confirm email
--


Europe's Solar Orbiter Pass

Clint Bradford
 

Europe's Solar Orbiter will fly by Earth tonight. Here's how to spot it in the night sky.


https://www.space.com/how-to-observe-solar-orbiter-earth-flyby


Caution ...

Clint Bradford
 

CAUTION: This is what can happen if you take your prescribed pain meds and then get on the 'Net late at night ...
May be an image of 1 person, outdoors and text that says 'Prime'
 
 
 
 
Like
 
 
 
Comment
 
 
Share
 
 
 
 


ISS SSTV December 1-2

Clint Bradford
 

Reports received that Moscow Aviation Institute (MAI) SSTV experiment sessions are in work and targeting December 1 and 2. The targeted times are currently listed below but subject to change.

 

December 1 – Start: 12:10 UTC. Stop: 19:10 UTC

December 2 – Start: 11:40 UTC. Stop: 17:20 UTC

Expected SSTV mode is their traditional PD120 and images will be transmitted on 145.800 MHz. 


ISS Crossband Repeater

Clint Bradford
 

I was very pleasantly surprised that there wasn't a monumental pile-up 
attempting to work the ISS at 6PM local time here in Southern California!
 
I got in with just an HT and improved whip (21") antenna. 4W TX power.
 
SO ... If you've been hesitant in the past due to heavy traffic, please reconsider 
before December - when the ISS will be flipped to APRS/Packet mode!
 
Clint K6LCS
work-sat.com


Not "our" ISS antenna ... but interesting

Clint Bradford
 

November 12, 2021 
MEDIA ADVISORY M21-152
NASA to Air Spacewalk to Swap Communications Antenna on Space Station
Astronaut Tom Marshburn, STS-127 mission specialist, participates in his first spacewalk and the second overall for the crew members of the Space Shuttle Endeavour and the International Space Station July 20, 2009.
Astronaut Tom Marshburn, STS-127 mission specialist, participates in his first spacewalk and the second overall for the crew members of the Space Shuttle Endeavour and the International Space Station, July 20, 2009.
Credits: NASA

Two NASA astronauts will venture outside the International Space Station on Tuesday, Nov. 30, for a spacewalk to replace a faulty antenna system. NASA officials will describe the upcoming spacewalk during a news conference on Wednesday, Nov. 17.

 

NASA will provide live coverage of the news conference and spacewalk on NASA Television, the agency’s website, and the NASA app.

 

NASA astronauts Thomas Marshburn and Kayla Barron will exit the Quest airlock around 7:10 a.m. EST to replace an S-band Antenna Subassembly (SASA) with a spare already available on the station’s truss structure. The space station transmits low-rate voice and data with flight controllers on the ground over the S-band of radio frequencies. Live coverage will begin at 5:30 a.m.

 

NASA’s Johnson Space Center in Houston will host a news conference to preview the spacewalk at 2 p.m. Wednesday, Nov. 17. Participants are:

 

  • Dana Weigel, NASA deputy manager of the International Space Station Program
  • Vincent LaCourt, NASA spacewalk flight director
  • Art Thomason, NASA spacewalk officer

 

Reporters who wish to participate in the news conference by telephone must call the Johnson newsroom at: 281-483-5111 no later than 1:45 p.m. Wednesday, Nov. 17. The briefing is virtual only due to safety restrictions related to the ongoing COVID-19 pandemic. Anyone following the briefing on social media may ask questions using #AskNASA.

 

The spacewalk is expected to take about six hours and 30 minutes to complete. Marshburn and Barron will work at the Port 1 (P1) truss structure, where the antenna is mounted. The antenna recently lost its ability to send signals to Earth via NASA’s Tracking and Data Relay Satellite System. Although its degradation has had limited impact on station operations, mission managers decided to install a new antenna to ensure communications redundancy. The space station has additional low-rate S-band systems, as well as the high-rate KU-band communications system that relays video.

 

Throughout the spacewalk, Marshburn will position himself at the end of the Canadarm2 robotic arm, working in tandem with Barron. Astronaut Matthias Maurer of ESA (European Space Agency) will control the robotic arm from inside the space station.

 

Marshburn will serve as extravehicular crew member 1 (EV1), with red stripes on his spacesuit, while Barron will be extravehicular crew member 2 (EV2), with an unmarked suit. This will be the fifth spacewalk for Marshburn, the first spacewalk for Barron, and the station’s 245th spacewalk in support of assembly, maintenance, and upgrades.

 

Earlier this month, the International Space Station surpassed its 21-year milestone of continuous human presence, providing opportunities for unique research and technological demonstrations that help prepare for long-duration missions to the Moon and Mars and also improve life on Earth. During that time, 249 people from 19 countries have visited the orbiting laboratory, which has hosted nearly 3,000 research investigations from researchers in 108 countries and areas.

 

Learn more about the International Space Station, its research, and its crew, at:

 

https://www.nasa.gov/station

 

-end-


ISS X-band - No One There?

Clint Bradford
 

Last night at 11:31pm local time: Only two hams accessed the ISS on 
this magnificent pass over the most populous region of the US' most 
populous state ... 


Re: Simple automatic antenna rotation system- any suggestions?

Don Solberg
 

Tom,

I use a similar combination of an AZ rotator, which in my case is a Yaesu, and a Yaesu G550 El rotator (which I believe is almost the same as your Kenpro.  Look at the controller hardware from ERC https://www.schmidt-alba.de/eshop/  they also have a GroupsIo forum.  For software I use PstRotator, interfaced to SatPC32.  

There are detailed instructions in the ERC manual for installing their controller board in the CD45 and the Kenpro 500.

Have fun with the satellites.

73,

Don K9AQ



Re: Simple automatic antenna rotation system- any suggestions?

Robert Hanson
 


Try
www.sarcnet.org

I have considered this for years. It is an impressive group.

73 
W6RH


Re: Simple automatic antenna rotation system- any suggestions?

Dwayne Terry
 

https://www.sarcnet.org/sarctrac.html is the correct URL for the suggested website


Re: Simple automatic antenna rotation system- any suggestions?

T W
 

Have you heard about sarctrac.net?

On 4 Nov 2021, at 12:40, Wojciech Tomczyk via groups.io <sp7wt@...> wrote:

Hello OMs,
I am novice who would like to extend my interest into amateur satellite operation.
As a start I would like to build an antenna rotation system based on my Kenpro 500 and Hy-gain CD 45 rotator.
While mechanics is not a problem for me, I am looking for details related to an automatic antenna system control, both hardware and software.
Can some OMs offer a simple solution- drawings, diagrams, photographs, description, etc. of a  working project?

Tom, SP7WT


Simple automatic antenna rotation system- any suggestions?

Wojciech Tomczyk
 

Hello OMs,
I am novice who would like to extend my interest into amateur satellite operation.
As a start I would like to build an antenna rotation system based on my Kenpro 500 and Hy-gain CD 45 rotator.
While mechanics is not a problem for me, I am looking for details related to an automatic antenna system control, both hardware and software.
Can some OMs offer a simple solution- drawings, diagrams, photographs, description, etc. of a  working project?

Tom, SP7WT


Re: Twitter Jail

Bruce Perens K6BP
 

On Wed, Oct 27, 2021 at 10:49 PM Clint Bradford via groups.io
<clintbradford@...> wrote:
Twitter slammed shut my account within an hour. "You are
advocating violence, and enticing others to do the same."
Congratulations on having been disciplined by a computer program. You
hit the right keywords.

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