AMSAT-UK test ESEO payload command uplink

Dr Chris Bridges M0IEB and Pete Bartram conduct uplink command testing on the ESEO payload in University of Surrey grounds

Dr Chris Bridges M0IEB and Pete Bartram conduct uplink command testing on the ESEO payload in University of Surrey grounds

AMSAT-UK are providing an amateur radio 1260/145 MHz FM transponder and a 145 MHz BPSK telemetry beacon for the European Student Earth Orbiter (ESEO) satellite.

Over the weekend of April 22-23, 2017, AMSAT-UK members met at the Surrey Space Centre to conduct some final testing of the command uplink on the Engineering Model of their payload which will launch on the European Space Agency ESEO mission.

The payload, which will transmit 1k2 and 4k8 BPSK telemetry on 145.895 MHz, was set up in the Arthur C Clarke building, with the AMSAT-UK team sending commands on L-band (1260 MHz) from some distance away in the university grounds.  A large string of attenuators simulated the path loss to low Earth orbit, while the VHF telemetry confirmed the level of signal received at the ‘spacecraft antenna’ and that the commands had been executed correctly.

With the lab and range testing declared a success, work now begins on constructing the Flight Model hardware. This is due for delivery by the middle of the summer so that it can be integrated into the 50 kg microsat. ESEO is expected to be launched late this year or in the first quarter of 2018.

ESEO satellite https://amsat-uk.org/satellites/communications/eseo/

ESEO Project Update October 2016

Dr Chris Bridges 2E0OBC and Pete Bartram from Surrey Space Centre with the AMSAT-UK payload and some of the ESEO electronics

Chris Bridges 2E0OBC and Pete Bartram from Surrey Space Centre with the AMSAT-UK FUNcube-4 payload and some of the ESEO electronics

A team of three from AMSAT-UK and Surrey Space Centre visited Forli in Italy in mid-October where the Engineering Model of the ESEO satellite is being assembled.

ESEO, The European Student Earth Orbiter, is a 50 kg satellite from ESA Education incorporating payloads from AMSAT-UK and Universities around Europe.

The AMSAT-UK FUNcube-4 payload will provide a 1260/145 MHz FM transponder and 145 MHz 1200 bps BPSK telemetry beacon to provide a telemetry downlink that can be easily received by schools and colleges for educational outreach purposes. The data will be displayed in an attractive format and provide stimulation and encouragement for students to become interested in all STEM subjects in a unique way.

The target audience is primarily students in Secondary and Higher education, the project includes the development of a simple and cheap “ground station” operating on VHF frequencies in the Amateur Satellite Service. The ground station would comprise an omni-directional antenna feeding a FUNcube DonglePRO+ SDR receiver which will receive the signals direct from the satellite and transfer the data to specially developed graphical software running on any Windows laptop.

David Bowman G0MRF holds the ESEO bottom plate during the fit check of the L band patch antenna

David Bowman G0MRF holds the ESEO bottom plate during the fit check of the L band patch antenna

During the visit to Forli, the team began work integrating the AMSAT-UK payload into a FlatSat version of ESEO at the facilities of Sitael, who are the prime contractor for the mission. One of the main objectives was to check communication between the payload’s CAN bus, the ESEO On-Board Data handling system (OBDH) and the science payloads. Until now the communication between units, using the CAN-Open protocol had only been simulated as each part of the satellite had been assembled in a different part of Europe. After a tense few hours and a few inevitable refinements to the firmware, data started flowing as planned and another milestone had been achieved.

When on orbit, the ESEO AMSAT-UK payload will transmit telemetry on 145.930 MHz at 1200 bps for educational outreach in a similar way to the FUNcube-1 satellite (AO-73). Additionally, In the event of a failure of the main 2.2 GHz S-Band transmitter, the payload will act as a redundant communications system for transmitting science data. To achieve this the payload can increase its transmission rate to 4800bps.

The team also carried out a fit check for the circular polarised L band patch antenna and checked out the L band to VHF FM transponder.

The flight model of ESEO is due to be delivered at the end of  the 2nd quarter of 2017. An Invitation to Tender for the launch has been issued by ESA.

Watch An RF look at ESEO by David Bowman G0MRF

2016 International Space Colloquium Presentations Playlist
https://www.youtube.com/user/AMSATUK/playlists

ESEO https://amsat-uk.org/satellites/communications/eseo/

Work continues on ESEO FUNcube-4

Graham Shirville G3VZV working on the ESEO FUNcube-4 amateur radio payload - Credit 2E0OBC

Graham Shirville G3VZV working on the ESEO FUNcube-4 amateur radio payload – Credit 2E0OBC

AMSAT-UK members have been busy this week working on the FUNcube-4 amateur radio payload for the new European Student Earth Orbiter (ESEO) satellite. On Friday, August 7, 2015 they tested the transponder and it seems to work fine. More testing and characterisation will follow over the next few days.

ESEO FUNcube-4 Engineering Model

ESEO FUNcube-4 Engineering Model

This is the third mission within the European Space Agency’s Education Satellite Programme. The satellite, which has a mass of 40 kg and measures 33x33x63 cm, is planned to launch into a Low Earth Orbit (LEO).

The spacecraft will carry a 1260/145 MHz FM transponder and 145 MHz 1200 bps BPSK telemetry beacon to provide a telemetry downlink that can be easily received by schools and colleges for educational outreach purposes. The data will be displayed in an attractive format and provide stimulation and encouragement for students to become interested in all STEM subjects in a unique way.

The target audience is primarily students at both primary and secondary levels and the project includes the development of a simple and cheap “ground station” operating on VHF frequencies in the Amateur Satellite Service. This station is an omni-directional antenna feeding a FUNcube DonglePRO+ SDR receiver which will receive the signals direct from the satellite and transfer the data to specially developed graphical software running on any Windows laptop.

Watch “ESEO Payload Update” by Chris 2E0OBC and Graham G3VZV at 2015 AMSAT-UK International Space Colloquium

Download the ESEO Presentation Slides

2015 International Space Colloquium Presentations Playlist
https://www.youtube.com/user/AMSATUK/playlists

AMSAT-UK to provide Amateur Radio payload for ESEO satellite

The ESEO spacecraft Copyright ALMASpace - ESA

The ESEO spacecraft Copyright ALMASpace – ESA

AMSAT-UK will be providing a 1260/145 MHz FM transponder and a 145 MHz BPSK telemetry beacon for the European Student Earth Orbiter (ESEO). This is the third mission within the European Space Agency’s Education Satellite Programme.

The satellite, which has a mass of 40 kg and measures 33x33x63 cm, is planned to launch in 2015-16 into a low Earth orbit.

Nine European universities will be working with the prime contractor ALMASpace, Italy, on the mission. Cranfield University in Bedfordshire will be supplying a small sail that will be deployed to demonstrate the de-orbiting of spacecraft at the end of the mission.

The primary purpose of the AMSAT-UK payload is to provide a downlink telemetry that can be easily received by schools and colleges for educational outreach purposes. The data will be displayed in an attractive format and provide stimulation and encouragement for students to become interested in all STEM subjects in a unique way.

The target audience is primarily students at both primary and secondary levels and the project includes the development of a simple and cheap “ground station” operating on VHF frequencies in the Amateur Satellite Service. This station is an omni-directional antenna feeding a FUNcube DonglePRO+ SDR receiver which will receive the signals direct from the satellite and transfer the data to specially developed graphical software running on any Windows laptop.

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