Categories
Ham Satellite news

CatSat to Open Microwave Linear Transponder Access for Amateur Radio Community

Re-post from ANS-313:

The CatSat team has announced that preparations are underway to open public operation of the spacecraft’s linear transponder, offering the amateur-radio community a new microwave-band satellite resource. CatSat, a 6U CubeSat developed and flown by students, faculty, and staff at the University of Arizona in partnership with FreeFall Aerospace and Rincon Research, has been on orbit since July 2024 and is now entering the phase of its mission focused on community engagement and technology demonstration.

CatSat was launched aboard a Firefly Aerospace Alpha rocket from Vandenberg Space Force Base as part of NASA’s CubeSat Launch Initiative. Measuring roughly the size of a family-size cereal box, the spacecraft carries a suite of experimental payloads, including a novel inflatable antenna capable of enabling large-aperture communications from a small satellite platform. In addition to ionospheric monitoring via high-frequency (HF) radio measurements and imaging of the Earth, CatSat includes a linear transponder for amateur radio, extending the University of Arizona’s long legacy in space science down to hands-on student involvement.

The satellite orbits Earth in a nearly sun-synchronous polar orbit, circling the globe approximately every 90 minutes. As part of its student-driven mission, CatSat is demonstrating how cutting-edge antenna systems and commercial-off-the-shelf radio hardware can support meaningful research and amateur communications from a compact form factor. The mission is funded by the University of Arizona Office of the Vice President for Research and the Arizona Space Institute, with additional support from industry partners.

When the linear transponder is active, CatSat listens on 5.663 GHz (uplink) and transmits on 10.47 GHz (downlink), providing approximately 200 kHz of bandwidth. Patch antennas on the spacecraft’s −Y face offer roughly 60-degree beam coverage, and the attitude-control system can point the antenna footprint at ground stations for up to 10 minutes per pass. Power considerations limit each activation to about 15 minutes, a balance that allows the spacecraft to support both mission science and amateur communications.

Early on-orbit demonstrations used a 1-meter C-band uplink dish and a 6.1-meter X-band downlink dish to confirm transponder functionality, successfully relaying Morse code. The CatSat team is now constructing a more accessible ground station using 1-meter-class commercial antennas to show that amateur access is practical with reasonably sized equipment. Operators will be able to monitor schedule updates — informally known as the “five and dime” plan — through the CatSat mission website.

Commissioning passes targeting the CatSat ground stations in Tucson took place on October 29 and November 2, with one final activation scheduled for November 9 at approximately 7:50 PM MST (UTC-7) — just hours after this bulletin’s publication. As testing continues, dates may shift as the team evaluates performance and power-budget constraints. Operators can follow activation plans and future opportunities at https://catsat.arizona.edu.

Read the full announcement at: https://catsat.arizona.edu/news/catsat-team-preparing-public-linear-transponder-operations

[ANS thanks the CatSat Team and the University of Arizona for the above information]

Categories
Members news

Winner 2025 antenna lottery

And the winner is – Jan Emanuelsson SM7KOJ! Congratulation!

Categories
Members news

Svar på förslag till förbättringar runt AMSAT-SM

Under 2025 års antenntävling fanns det möjlighet att komma med förslag till förbättringar runt AMSAT-SM hur vi kan göra det lättare att komma igång med amatörradiosatelliter.

Det viktigaste som kom fram är att vi behöver bli bättre på att presentera nybörjarartiklar och att hitta dessa på hemsidan.

Här kommer några av förslagen, dock inte alla, och våra svar.

  • Tydligare artiklar för nybörjare och enklare att hitta
    Svar:
    Det är önskvärt från många att det blir tydligare och enklare att hitta nybörjarartiklar på hemsidan.
    “Börja lyssna på satelliter” ska därför skrivas om från grunden och hemsidan ska göras om lite så att nybörjarartiklar, på svenska, syns bättre.
  • En FAQ för nybörjare
    Svar:
    Se ovan. Det kommer att synas bättre på hemsidan vilka artiklar som är för nybörjare.
  • Presentation av trackingprogram och tips för användaren runt spårning. Mera info om hur man spårar satelliter.
    Svar:
    Vi ska lyfta fram det bättre på hemsidan
  • Web-SDR för att lyssna på satelliter
    Svar:
    Vi har länkat till den QO-100 Web-SDR som finns tillgänglig, finns på QO-100-sidan. Vi har ej möjlighet för tillfället att drifta en egen Web-SDR.
  • Byggförslag på antenner
    Svar:
    Vi har gjort några sådana artiklar men just nu inget nytt på gång. Se annars: https://www.amsat.se/antenner
  • En satellitdag – vara med på loppisar/events
    Svar:
    Ja det vore kul! Få se om någon av oss kan vara med på något under 2026.
  • Göra en svensk YouTube-video om hur man kommer igång med satelliter.
    Svar:
    Det har vi tyvärr inte kapacitet att klara av att producera så det kommer inte att bli av. Men vi kommer att länka mer till många bra andra YT-videos som finns.
  • Artiklar runt att bygga egna rotorer
    Svar:
    Vi ska skriva lite mer om det.
  • Skriva artiklar i QTC
    Svar:
    Vi har en förhoppning att publicera en nybörjarartikel i QTC under 2026, dvs samma artikel som vi ska skriva för hemsidan.

Categories
Ham Satellite news

AMSAT-NA President Outlines Future Directions

From ANS-299:

At the Annual General Meeting of AMSAT members, held as part of the AMSAT Symposium in Phoenix, Ariz. last weekend, newly elected AMSAT President Drew Glasbrenner, KO4MA, outlined some future directions for the organization.

Noting that membership in organizations and voluntary associations of all types has been declining across the board, in all areas of society, Glasbrenner suggested a two-pronged approach.

First, reduce the cost per member. AMSAT has already made major steps in that direction, by closing the office and changing to an all-volunteer administration, and also by changing the AMSAT Journal from print to a digital publication. The organization should seek more opportunities to economize.

Second, increase membership by creating a strategy to actively seek and invite new hams. The Board has just approved a free student membership to bring young hams into the organization. Reinstating a College Activity Night on the satellites, an AMSAT Youth Net, and publicizing youth satellite activities are priorities. Another possibility might be a two-tiered membership structure with a low-fee introductory membership.

Glasbrenner also noted that government budget cuts have caused NASA to eliminate the CubeSat Launch Initiative program (CSLI), which provided free launch opportunities to educational projects. AMSAT has benefited from CSLI, but has also purchased commercial launches in the past. He indicated that AMSAT should not wait to see if CSLI is reinstated or replaced with a similar program, but that the organization should move forward to fund commercial launches for GOLF-Tee and Fox Plus satellites that are nearing readiness in coming months.

Another challenge facing AMSAT is that it is becoming increasingly difficult to operate in Low Earth Orbit (LEO). While orbital debris regulations forbid launches to higher orbits without meeting stringent technical requirements for deorbiting, reentry devices are largely unavailable or unproven. The GOLF program is meant to address this, but launches to higher orbits are also difficult to find. Future rules may mandate propulsion for collision avoidance in LEO.

A strategy to meet these orbital challenges is to focus on developing amateur radio payloads that can fly on other satellites. The Italian Greencube satellite, IO-117, was an example. To take advantage of these opportunities, AMSAT engineers must focus on developing payloads as a series, rather than as single projects, so that units are “on the shelf” and available on short notice. The SDR Gen2 transverter board – an updated version of the units flown on HuskySat and MESAT1 – is a major step in this direction, as is the updated PacSat board under development. The GOLF and Fox Plus programs are also being crafted to create satellites in a series with iterative improvements and an up-tempo launch cadence.

Finally, Glasbrenner called for strengthening international collaboration with other AMSAT organizations around the world, as well as establishing mechanisms for strategic planning at the Board of Directors level. His address was received enthusiastically by those in attendance.

[ANS thanks Mark Johns, KØJM, News Service Senior Editor, for the above information.]

Categories
Ham Satellite news

e-kagaku-1 and BOTAN

Three Japanese CubeSats were deployed from the ISS using the Japanese J-SSOD on October 10, 2025. Two of the satlelites transmit in the amateur radio bands.

e-kagaku-1
CW, DigiTalker, 1.2kbps AFSK, 9.6kbps GMSK  145.840MHz
https://ekagaku-sat.net/   This web site is in Japanese
https://iaru.amsat-uk.org/finished_detail.php?serialnum=888

BOTAN
APRS 145.825MHz
Digital 437.375MHz
https://sites.google.com/p.chibakoudai.jp/gardens-04/
https://iaru.amsat-uk.org/finished_detail.php?serialnum=938

[ANS thanks JAXA and Masahiro Arai, JN1GKZ, for the above information]

Categories
Ham Satellite news

FutureGEO Workshop 2025 in Bochum

Thanks to ANS and AMSAT-DL for this info:

On September 19, 2025, the futureGEO workshop took place under the radome of the Bochum Observatory. Organized by AMSAT-DL with the support of ESA, the event brought together international experts, representatives of amateur radio organizations and dedicated radio amateurs who had previously declared their active participation in an appeal and submitted corresponding proposals. In the spring, AMSAT-DL had invited potential interested parties as part of an RFEI. The aim was to build on the experience gained with QO-100 and to jointly define the first concrete mission ideas for a future amateur radio payload in geostationary orbit.

The workshop was held as a hybrid event. The group was made up of one half who were present on site and the other half who took part online via ZOOM. Andrew Glasbrenner, K04MA, AMSAT VP – Operations represented AMSAT-USA at the meeting.

The purpose of the workshop was to collect, cluster and prioritize ideas:

  • Mission & Services – Which communication services and experiments should a new GEO payload enable?
  • Payload & antennas – What technical solutions are conceivable?
  • Ground station & operation – How can control and operation be organized?
  • User segment – Who should have access and how?

In a concluding reflection among the participants, it became clear how much QO-100 has revitalized and enriched the amateur radio community:

  • Affordable entry into microwave communication with low-cost SDRs and LNBs.
  • Development of open source software such as DVB-S2 encoders and decoders.
  • Educational projects from schools to schools contacts with Antarctica and other events.

The participants hope that radio amateurs can be even more involved in the construction of the hardware of a futureGEO with appropriate personal contribution, transparency and participation than was possible with QO-100 due to NDAs with the manufacturers and owners of the parent satellite.

The next steps are clear: The mission ideas developed in the workshop will be further concretized and should be available by the end of 2025 in the form of 1-3 consolidated mission concepts that are both technically exciting and attractive to the international amateur radio community and must also be technically feasible.

Read the entire story at https://amsat-dl.org/en/review-futuregeo-workshop-2025-in-bochum/ .

[ANS thanks AMSAT-DL for the above information.]