• [ANS] ANS-316 AMSAT News Service Weekly Bulletins

    From Paul Stoetzer via ANS@21:1/5 to All on Sat Nov 11 19:09:09 2023
    XPost: rec.radio.info


    In this edition:

    * Trends in Propulsion Systems for Small Satellites
    * FO-99 Re-enters
    * URESAT-1 Designated Spain-OSCAR 120 (SO-120)
    * New Satellite Distance Records
    * Changes to AMSAT-NA TLE Distribution for November 10, 2023
    * ARISS News
    * Upcoming Satellite Operations
    * Hamfests, Conventions, Maker Faires, and Other Events
    * Satellite Shorts From All Over

    The AMSAT News Service bulletins are a free, weekly news and information service of AMSAT, 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]

    You can sign up for free e-mail delivery of the AMSAT News Service
    Bulletins via the ANS List; to join this list see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/

    ANS-316 AMSAT News Service Weekly Bulletins

    From: Radio Amateur Satellite Corporation
    712 H Street NE, Suite 1653
    Washington, DC 20002

    DATE 2023 November 12

    Trends in Propulsion Systems for Small Satellites

    Recently AMSAT News Service had the opportunity to interview Jonathan Brandenburg, KF5IDY, AMSAT Assistant VP – Engineering about recent
    in propulsion systems for small satellites.

    ANS: “Jonathan, we understand you are looking at propulsion systems
    might be added to future satellites. What is the impetus for this?

    JB: “As we all know, debris is becoming a big issue in space. The a
    mount of
    debris in space is growing and any of it that hits a satellite can cause significant damage. The European Space Agency estimates that there are more than 35,000 pieces of space debris, 2/3 of which is in LEO. Further, for
    the first time the FCC has issued a fine to Dish Network because they were
    not able to move its defunct EchoStar-7 satellite fully into the intended disposal orbit. Dish was supposed to move it 186 miles further from the
    earth, but it only reached 76 miles because the satellite ran out of fuel.
    This fine is likely a harbinger of things to come.

    “The FCC has pending requirements to be able to deorbit on command.
    we are beginning to hear rumblings that we may have to be able to maneuver satellites to avoid a “conjunction event,” that is a collis
    ion. This is
    just in the conversation stage.”

    “In addition, we often wish to reach higher orbits with AMSAT
    s satellites.
    With the ability to thrust we can launch into a lower and more accessible
    orbit then raise our orbit with onboard thrusters.

    ANS: “That is very crucial capability for AMSAT to add. What is req
    uired to
    do this and how difficult will it be to achieve?”

    JB: “We need three things: a GNSS – a Global Navigational S
    pace System, an
    ADCS – an Attitude Determination, and Control System, and a thruste

    “A GNSS is needed to determine the exact position of the satellite.
    We have
    a current ASCENT project in progress for this.

    “We have to be able to accurately determine the position and orient
    ation of
    the satellite so that we know the thrusters are oriented in the correct direction when they are fired. We are currently planning to fly an ADCS on
    the GOLF-TEE satellite which estimated to be launched in Q2 2025. The plan
    is to fly an ADCS purchased from CubeSat.

    “We have a new ASCENT project for small satellite thrusters. This
    is our
    topic of discussion here. There are many different types of thruster
    systems. Examples are:
    - Solid motor thrusters which are very powerful,

    - Hall effect thrusters which are popular, large and power hungry but very reliable,

    - Electrospray thrusters are relatively inexpensive and simple. The
    propellant can be solid or a liquid which melts down quickly and then is accelerated out of the nozzle with an electric field. It is an affordable technology, and a moderately simple technology.

    - And pulsed plasma/vacuum arc thrusters which have the advantage of being
    a very, very simple and affordable technology. It uses an electric arc to ablate the material which becomes the fuel. The fuel material can be a
    light metal or a high technology plastic.

    “We’ve recently acquired a demonstration kit for a pulsed p
    lasma type
    thruster. We are in the early stages of engaging our volunteers to perform
    an in-depth analysis of this thruster as part of our investigation to
    determine which thruster is the most appropriate for AMSAT.

    ANS: ”Interesting. How can we learn more?”

    JB: “I gave a 20-minute presentation on this at the recent AMSAT An
    Space Symposium, which you can see on YouTube. The presentation includes a short demonstration of a pulse plasma type thruster made by Hypernova
    Space. The demonstration includes firing the thruster, the control
    software, and some of the output data.”

    ANS: Thank you for your time, Jonathan!

    Link to Jonathan Brandenburg’s presentation is: https://www.youtube.com/watch?vO4-h7bbxs&tF5s

    [ANS thanks Jonathan Brandenburg, KF5IDY, AMSAT Assistant VP – Engi
    and Mark
    Blackwood, KI5AXK for the above information.]


    The 2023 AMSAT President's Club coins are here now!
    To commemorate the 40th anniversary of its launch
    on June 16, 1983, this year's coin features
    an image of AMSAT-OSCAR 10.
    Join the AMSAT President's Club today and help
    Keep Amateur Radio in Space!


    FO-99 Re-enters

    FO-99 re-entered on November 9, 2023 after nearly five years in orbit.
    Launched on January 18, 2019 on an Epsilon launch vehicle, the 1U CubeSat, named NEXUS for Next Generation X Unique Satellite, was designed and built
    by Nihon University in collaboration with JAMSAT. The satellite
    demonstrated a high speed QPSK transmitter and also sent SSTV transmissions
    and carried a VHF/UHF linear transponder.

    [ANS thanks Nihon University, JAMSAT, and AMSAT Orbital Elements Manager
    Joe Fitzgerald, KM1P, for the above information]

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)