Posts by HB9SKA

  • UMKA-1 R4UAB Teleskop mit am Bord

    UMKA-1 School Satellite Sets Out to Explore the Skies


    The UMKA-1 satellite, developed by schoolchildren from the Moscow Regional Educational Institution Secondary School No. 29 named after P.I. Zabrodin (Podolsk) in collaboration with SPUTNIKS LLC, was successfully launched into orbit on June 27, 2023. As part of the "Space-π" program and with the support of the Innovation Assistance Fund, UMKA-1 aims to train young students in spacecraft design, programming, and assembly, while also conducting astronomical observations using its high-aperture telescope, Leptonar-20955K.


    The UMKA-1 satellite is a 3U+ CubeSat equipped with a Leptonar-20955K optical telescope and an astronomical digital camera called PlayerOne Saturn-C SQR. This compact satellite operates in two frequency bands, with telemetry transmission taking place on the UHF downlink frequency of 437.625 MHz, using GMSK USP modulation scheme at a rate of 2400 baud. Additionally, the transmission of data from the telescope occurs on the S band at a frequency of 2402 MHz. On June 18th, 2023, UMKA-1, known by its designated callsign RS40S, obtained its IARU Amateur Satellite Frequency Coordination.


    Named after a beloved Soviet cartoon character, UMKA-1 carries the spirit of adventure and discovery. The mission team plans to share the main course of their mission, interesting events from the ground segment, and a transmission schedule on the S band with the wider community. Once the satellite is fully operational, a schedule will be published, and opportunities will be provided for the reception of images from the telescope.


    Despite some minor setbacks during the installation process, the UMKA-1 team remains dedicated to the success of their mission. The initial format installation confusion has been addressed, and the satellite is currently undergoing testing. The team expects the telescope to be fully operational by the end of July, following which a transmission schedule will be made available.


    Alexey Shafiev, RA3PPY, expressed gratitude to SPUTNIX for their support and guidance throughout the project. He acknowledged the enthusiasm and efforts of the young schoolchildren and students who form the bulk of the team. Their passion for space exploration is evident, and they have been actively involved in every aspect of the project.


    In the past week, the telemetry transmission format was updated to use GMSK USP 2400 baud. The Mission Control Center (MCC) team will next focus on stabilizing the spacecraft and ensure the proper functioning of the guidance system. Subsequently, a two-week testing period for the payload will commence before UMKA-1 can fulfill its educational mission.


    The UMKA-1 team assures the community that updates on their progress will be provided as soon as possible. Despite their current work rush, they value the interest and support from all those following their mission. Alexey, on behalf of the team, promises to respond to all the emails received thus far in the near future.


    As of July 4, 2023, UMKA-1 remains operational in orbit, transmitting telemetry data pertaining to the satellite's operation. The team has made available a tool for decoding S band dump transmissions from the spacecraft, allowing enthusiasts to access the images collected by UMKA-1.


    For radio amateurs keen on participating in the mission, the UMKA-1 team offers a QSL card as recognition for receiving telemetry from the satellite. To qualify, individuals must receive three packets of telemetry data and upload the collected information to the QSL card application form found at https://r4uab.ru/diplomnye-programmy-i-qsl/mka-umka-1/ within 24 hours of receiving the last telemetry package. The required software for receiving the telemetry information, such as "SoundModem USP" and "AGW Client R4UAB," is available to facilitate the process.


    The UMKA-1 mission is an exciting endeavor that combines education, amateur radio, and scientific exploration. By encouraging young minds to explore the wonders of space, this project aims to inspire the next generation of scientists, engineers, and astronomers. The UMKA-1 team invites everyone to join them on this incredible journey as they unlock the secrets of the universe through their school telescope satellite.


    More detailed information about the UMKA-1 satellite is available at https://sputnik.school29.ru/radio/. Individuals can visit the project's GitHub repository at https://github.com/radio-satellites/UmKa-1/ to obtain the software needed to decode the S band dump transmissions, which contain high resolution imagery from the telescope on board the satellite.


    [ANS thanks Alexey Shafiev, RA3PPY and R4UAB.ru for the above information]

  • UMKA-1 R4UAB Teleskop mit am Bord

    Ist mir jetzt eingefallen: JE9PEL hat auch eine riesige Liste:

    http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm


    Da kann man nach "2400." und "2401." in der rechten Spalte suchen und der Sat sollte noch grün unterlegt sein. Good hunting ;)


    Nachtrag:

    Code
    DTUsat-2                    40030   1268.900          2401.835          2401.860     9k6CPFSK/1k2,19k2MSK,CW   OZ2DTU       *

    Da habe ich es lange probiert, aber nichts empfangen. So viel ich weiss, ist DTUsat-2 nur im Sonnenlicht aktiv, da die Stromversorgung ausgefallen ist.

  • UMKA-1 R4UAB Teleskop mit am Bord

    Quote from DD4YR

    Thomas, ist derzeit überhaupt ein LEO auf 2,4 GHz noch aktiv.

    In allen Listen die ich bisher durchgesucht habe bin ich nicht fündig geworden. Entweder gibts den Sat nicht mehr, oder keine Frequenzangaben, oder verwirrende Satellitennamen..... Jede Liste schaut etwas anders aus, bin da etwas ratlos.


    73 de Robert

    Hallo Robert


    Seit UO-11 habe ich keinen S-Downlink mehr beobachtet. Es werden bei der IARU S-Band-QRGs koordiniert, aber ob und wie/wann die QRV sind, weiss ich auch nicht. Da weisst Du jetzt mehr als ich. Meine 1.2 m Schüssel müsste ich wieder in Schuss bringen, die steht auch schon jahrelang da oben unbenutzt im Estrich.

  • PRECURSOR satellite

    I met the designer of the propulsion system and Mario, DL5MLO, in Friedrichshafen at the AMSAT-DL stand. The system is a test unit and brings the satellite only in a 20 - 30 km higher orbit (LEO).

  • PRECURSOR satellite

    Hallo Peter


    In the SATELLITE DESCRIPTION you can read "The main experiment is a new generation propulsion system for Orbital Plane Change (inclination) and/or Orbital Altitude Change and uses green propellant." I think the sat will be shot from LEO in a higher orbit. Further infos will follow, hopefully.


    CU in Friedrichshafen


  • PRECURSOR satellite

    Source: https://iaru.amsat-uk.org/formal_detail.php?serialnum=916


    PRECURSOR Updated: 28 May 2023   Responsible Operator Mario Lorenz DL5MLO Supporting Organisation Spectrum Aerospace Technologies UG Contact Person dl5mlo@amsat-dl.org.nospam Headline Details: PRECURSOR is 15cm x 30cm x 60cm, 18kg weight (including propellant). \it is planned to be launched on an experimental/test flight on a LandSpace ZQ-2 to a geosynchronous orbit in 460km altitude. Current estimates predict a mission lifetime between 1 and 5 years, depending mainly on solar activity and success in the primary mission. The primary mission of PRECURSOR is the in-orbit- verification of an electric propulsion system within ~ 6 months after launch. Due to the power demands of the electric propulsion system, the satellite includes significant electrical power collection capabilities. Once the propellant (reaction mass) for the propulsion system is used up, the power budget allows for several secondary missions: Amateur Radio: - Provide an U/V amateur radio transponder - Enable S/C tracking using telemetry - Provide a software defined wideband L/S amateur radio transponder and/or signal source Educational experiments: - an onboard computer using an intra-satellite wireless bus system (University of Wuerzburg) - radiation sensors - GNSS experiments including a software defined GNSS system (ETH Zurich, Fraunhofer IIS Erlangen) - LPWAN technology verification (Fraunhofer IIS Erlangen) - two cameras - various antenna systems.Other than collecting telemetry and learning about satellite operating environment, an 25kHz linear, bent- pipe Mode U/V will support direct amateur radio operation and involvement. A software-defined wideband L/S transponder will allow for direct amateur radio operation and involvement. Being software-defined, its characteristics can be modified while it is in orbit by uploading new software. On a time-shared basis, this transponder can be used as a bent-pipe transponder, a regenerating transponder, or as a signal source carrying telemetry or live video. For a typical user station, a 250kbit/s link is planned, sufficient for narrowband DATV operations. Stations putting more effort into their ground stations could benefit from higher bandwidths, enabling (2..5 MHz). Other than a purely linear transponder, regenerative transponders of varying modes can be experimented with. This would include 5G and IoT waveforms. We expect to turn on the U/V transponder after initial checkout of spacecraft, about 1 month after launch. L/S transponder will be operated on a time-share basis depending on available power and mission requirements. Proposing VHF and S Band downlinks with 9k6 GMSK telemetry with CCSDS formatting. Planning a launch from Jiuquan Satellite Launch Center in Q4 2023. More info at http://precursor.space/#_SATELLITE_DESCRIPTION Application Date: 23 May 2023 Freq coordination completed on 01 Jan 1970

    The IARU Amateur Satellite Frequency Coordination Status pages are hosted by AMSAT-UK as a service to the world wide Amateur Satellite Community


    Infos:

    http://precursor.space/


    I think there is something wrong with the orbit specification.


    But WOW, this will be a next super HAM satellite :!::):thumbup: