Archivos de la categoría Radioaficion – Amateur Radio

Issue 245 of OSCAR News Now Available

E-members of AMSAT-UK can now download the April 2025 edition of OSCAR News, issue 245, here.

The paper edition edition will be sent to postal members and should arrive in the next 2-3 weeks.

In this issue:
• From the Secretary’s Keyboard
• Satellite News
• Team 2: Canada VO100QO by Stefan Wagener VE4SW and John Langille VE1CWJ
• Roving in England & Wales by Endaf Buckley N6UTC / MW1BQ
• A Quadrifilar Helicoidal Antenna by Ron G4LMN
• AMSAT-UK Statement of Accounts
• The FUNcube-Lite Payload on Jovian-1 by David Bowman, G0MRF
• FUNcube Lite – Project Update by David Bowman, G0MRF
• ARISS Contact Report between the Girlguiding Surrey West Association and the International Space Station on 5th October 2024 by Ciaran Morgan M0XTD
• Goonhilly Radio Club M0XGH by David Johnson G4DPZ

AMSAT-UK FUNcube Mission Patch

E-members of AMSAT-UK are able to download the quarterly publication OSCAR News as a convenient PDF that can be read on laptops, tablets or smartphones anytime, anyplace, anywhere. Join as an E-member at Electronic (PDF) E-membership

PDF sample copy of “Oscar News” here.

Join AMSAT-UK using PayPal, Debit or Credit card at
http://shop.amsat-uk.org/

E-members can download their copies of OSCAR News here.

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Results of Fram2Ham Competition Announced

Rabea Rogge LB9NJ KD3AID operating ICOM IC-705 from Fram2 spacecraft

Rabea Rogge LB9NJ / KD3AID has announced the three teams that scored the highest in the Fram2Ham SSTV competition for students.

In a post on Discord she says:

Dear @everyone,
first of all: Thank you to everyone participating! It was such fun seeing the engagement and having this direct connection to you all on the ground – literally. These were the best moments on the mission: sending down the pictures, looking down at Earth and knowing that there is someone right there looking up at the same moment. We have seen great submissions to the SSTV gallery and quiz submissions. Without further ado, the three teams that scored the highest are the following:

1st Place – Grand Prize: Team ARISStocats! Active countries: Lithuania, Italy, US (Pennsylvania), Switzerland, US (California)

2nd Place: Team W1HLO-LA1K! Active countries: US (Conneticut), Norway, US (Pennsylvania), Germany

3rd Place: Team GuufyFram! Active countries: Greece, US (Pennsylvania), France, US (Kentucky), US (New York)

The winning teams will be contacted by email in the next days.

Well done everyone – we loved to see that all the teams were very international. My hope is that some friendships have formed, the passion for technology has been kindled and that most of all everyone had fun.

For everyone who is not listed above – don’t forget to claim your digital SSTV certificate! We are looking forward to seeing all the pictures of your setups and hearing the stories.

Further information on the Fram2Ham mission at https://amsat-uk.org/2025/04/01/fram2-mission-launched/

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ISS SSTV April 11-16 – Humans in Space

April 12 is the International Day of Human Spaceflight so, what better theme for the April 11-16 Slow Scan TV transmissions.

Start: Friday, April 11 1700 GMT (6pm BST)
End: Wed, April 16 1430 GMT (3:30pm BST)

Frequency: 145.800 MHz FM (+/-3.5 kHz Doppler Shift)
SSTV Mode: PD120 (Transmission cycle 2 minutes on, 2 minutes off)

You are invited to upload decoded images in the ARISS gallery, area “Series 26 – Humans in space” at: https://ariss-usa.org/ARISS_SSTV/

Once you’ve submitted, just clicking on the dedicated button you can apply for the official ARISS SSTV award.

Also, you can request the ARISS QSL by contacting the European QSL bureau: https://www.ariss-eu.org/index.php/ariss-station/european-qsl-bureau

To support everyone interested in such events, the European Space Agency released tutorials about how to receive pictures transmitted over amateur radio by the International Space Station: you can find them on https://issfanclub.eu/2024/11/08/esa-tips-how-to-get-pictures-from-the-international-space-station-via-amateur-radio-2/

It’s always possible to receive the ISS SSTV signal by using the WebSDR at the Goonhilly Earth Station, the audio can then be fed into your PC or Smartphone SSTV App  https://vhf-goonhilly.batc.org.uk/

Follow @ARISS_intl on X for official updates, since changes can occur.

Reminder, the images are sent on a (roughly) 2 minutes on, 2 minutes off schedule. So if you don’t hear anything, give it 2 minutes!

Many FM rigs can be switched been wide and narrow deviation FM filters. For best results you should select the filter for wider deviation FM. Handhelds generally have a single wide filter fitted as standard.

You can get predictions for the ISS pass times at https://www.amsat.org/track/

Useful information on receiving the pictures and links for Apps to display the pictures can be found here:
https://amsat-uk.org/beginners/iss-sstv/

You may be able to get publicity for the amateur radio hobby if you contact your local newspaper and tell them you’ve received a picture (doesn’t have to be perfect) from the International Space Station, see
https://amsat-uk.org/2015/02/04/iss-sstv-in-uk-press/

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Fram2 Mission Launched

Rabea Rogge LB9NJ / KD3AID – Photo credit DLR

A SpaceX rocket carrying radio amateur Rabea Rogge LB9NJ / KD3AID and 3 other astronauts launched from Pad 39A at the Kennedy Space Center on April 1 at 0146 GMT on the Fram2 mission. It is the first polar-orbit human spaceflight mission to explore Earth.

Rabea will be transmitting amateur radio Robot 36 Slow Scan TV (SSTV) images on 437.550 MHz (+/- 10 kHz Doppler shift) during the mission.

ARISS will provide special commemorative certificates for those who upload their Fram2 SSTV images to the ARISS SSTV Gallery. Certificates will be delivered after the completion of the Fram2 mission.

There are several challenges in receiving the images,  the low transmit power, variations of antenna orientation, and a short, 3-day mission duration, with only a limited time assigned for the SSTV operation. Are you up for the challenge?

Watch a recording made by Robbie Ei2iP of the amateur radio downlink during the contact on April 1 at 0728 GMT between Fram2 astronaut Rabea Rogge LB9NJ / KD3AID and students at the Technical University Berlin (note unexpected frequency change).

Watch the Technical University Berlin video of the contact

Operations Frequency: 437.550 MHz FM (+/- 10 kHz Doppler shift).

SSTV Mode: Robot 36

ARISS are livestreaming orbital predictions for the Fram2 mission at http://live.ariss.org/

Orbital predictions https://www.amsat.org/track/

Fram2 TLEs (also known as Keplerian, or Orbital Elements) https://www.ariss.org/keps.html

Upload your received pictures to https/ariss-usa.org/ARISS_SSTV/

Fram2Ham https://fram2ham.com/

First human Spaceflight to Earth’s polar regions https://f2.com/

Fram2Ham on Discord https://discord.com/invite/GYQzmSh5sp

Student competition details https://fram2ham.com/wp-content/uploads/2025/02/amapay_user_manual-ver-2-7-2025.pdf

Follow Rabea on X https://x.com/rprogge

Follow Chun Wang on X https://x.com/satofishi

Follow ARISS on X https://x.com/ARISS_Intl

Follow AMSAT-UK on X https://x.com/amsatuk

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Fram2Ham SSTV Simulation from ISS

Rabea Rogge LB9NJ / KD3AID – Photo credit DLR

Astronaut and radio amateur, Rabea Rogge LB9NJ / KD3AID, will be transmitting amateur radio Slow Scan TV images from space during the SpaceX Fram2 mission, planned for March.  It will be the first polar-orbit human spaceflight mission to explore Earth.

The International Space Station will be simulating the Fram2 SSTV mode PD-120 transmissions from February 13-17 on 437.550 MHz FM to enable people to gain proficiency in receiving the signals bafore the mission.

The Chair of ARISS International posted:

The ARISS international team is planning an SSTV event to help all participating to be as proficient as possible in acquiring images from Fram2Ham and submitting them in the SSTV gallery. Like previous SSTV events, ARISS will provide special commemorative certificates for those who upload images to the gallery. Certificates will be delivered after the completion of both the Fram2 simulation event and the Fram2 mission.

SSTV Simulation details:
Hardware: ARISS radio transmitter set to low power (5 watts vs. 25 watts for previous SSTV events). This is to simulate the challenges and unknowns of a new radio system on a Dragon capsule that might be in an unfavorable attitude in some parts of the mission flight path.

Operations Frequency: 437.550 MHz FM (+/- 10 kHz Doppler shift). Using the SSTV (public downlink) planned for Fram2Ham, ground users can practice the more challenging 70 cm Doppler correction.

SSTV Mode: PD120. The longer image capture for this simulation (120 seconds, vs. 36 seconds for Fram2Ham’s Robot 36 SSTV mode) will allow ground users to hone their signal polarization switching skills (manually and electronically) as well as precise antenna pointing.

Operations Duration: February 13 (World Radio Day) to February 17, 2025. This long duration, over a weekend, will allow users multiple passes to practice, learn lessons, make corrections, and try again.

Summary:
There are several challenges like low transmit power, variations of antenna orientation, and a short, 3-day mission duration, with only a limited time assigned for the SSTV operation. These challenges require operating proficiency and the use of the best attainable radio station and this simulation shall give the possibility to exercise this. Are you up for the challenge?

ISS pass predictions https://www.amsat.org/track/

Upload your received pictures to https/ariss-usa.org/ARISS_SSTV/

For more information on the Fram2 mission and for youth organizations interested in participating in the Fram2Ham SSTV competition, see https://fram2ham.com/

First human Spaceflight to Earth’s polar regions https://f2.com/

Fram2Ham on Discord https://discord.com/invite/GYQzmSh5sp

Competition details https://fram2ham.com/wp-content/uploads/2025/02/amapay_user_manual-ver-2-7-2025.pdf

Follow Rabea on X https://x.com/rprogge

Follow ARISS on X https://x.com/ARISS_Intl

Follow AMSAT-UK on X https://x.com/amsatuk

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