KLETSKOUS CubeSat Update

KLETSkous LogoThe KLETSKOUS satellite team is making good progress. SA AMSAT reports that the KLETSKOUS team made some major progress during the past few weeks.

Currently the team is researching a new type of battery. It was planned to use Lithium Ion but one of the negatives about Lithium Ion is that it may suffer thermal runaway, which increases the risk of fire. Companies, like NEC, have developed a Lithium-Iron battery using lithium Iron phosphate (LiFePO4) as the cathode material. Generally, anodes of most batteries are made of carbon. As safety and reliability is the first concern for any battery being used on a satellite, it should not get overheated or catch fire in case of overcharging. The Lithium-Iron battery has superior chemical and thermal stability.

The team is in the process of acquiring Lithium Iron batteries to run tests. If the decision is to switch to Lithium Iron Phosphate, some modifications will have to be made to the charging circuit in the power unit but Fritz Sutherland, ZS6FSJ, says that it is not a major problem and will not delay the construction of the next prototype of the power unit.

Frik Wolff, ZS6FZ, has finalised the layout of the solar panels and Hannes Coetzee, ZS6BZP, will now proceed to mount the solar cells on a test board, which has to be carried out in a vacuum chamber. Work has also commenced on the magnetic stabilisation of Kletskous, which will be achieved by the use of orthogonal rod magnets. ZS6FZ is current working on this and reported good progress with a prototype ready for testing.

Work on the On Board Controller (OBC) is also progressing well. The first two prototypes have been completed. Brain McKenzie, ZS6BNM, is now working closely with team members to establish their telemetry point requirements and interfaces.

Nico van Rensburg,  ZS6QL, has  been working on the specifications and configuration management  and has put a first draft on the table. The team meets via Skype on a fortnightly basis to discuss progress and plan the next steps.

Funding remains a major challenge. Radio Amateurs are urged to support the local CubeSat programme by donating to the SA AMSAT CubeSat building fund. Donors are acknowledged on the SA AMSAT web at http://www.amasatsa.org.za/

Source South African Radio League (SARL) http://www.sarl.org.za/

KLETSKOUS Linear Transponder Demonstration

KLETSkous Project Update

KLETSkous LogoThe South African Radio League (SARL) report at the pre-conference Engineering meeting held on Friday [June 19] members of the SA AMSAT CubeSat team made some tough decisions.

During the past few years, various options and subsystems have been experimented with.

The team has now set the launch date of KLETSkous at July 2017 with the first flight model to be ready by February 2016 for testing after which final integration will start. This requires that various module designs are locked down and built by October 2015.

It is planned to have all the modules wired together in a breadboard configuration for testing the interoperation of the various sub-units by December 2015. Some modules are at a more advanced stage than others, but in the next few months, the team expect to catch up and meet the deadline for the first breadboard test.

Frik Wolff, ZS6FZ, the League’s technical manager, has joined the team and is working on solar panels and stabilisation issues. Francois Oberholzer, an honours student at Stellenbosch University, is working on improving the weight/strength relationship of the space frame, a project that is part of his thesis. Nico van Rensburg, ZS6QL, as programme manager and the person responsible for documentation, will support the project manager, Hannes Coetzee, ZS6BZP.

There are many opportunities for radio amateurs to join the engineering team. If you have a particular expertise or passion to add value to the  KLETSKOUS project, please discuss your participation with Hannes Coetzee or any of the team members and send your details to saamsat@intekom.co.za

Source SARL http://www.sarl.org.za/

KLETSkous http://www.amsatsa.org.za/KLETSkous.htm

SA AMSAT Space Symposium June 20, 2015

KLETSkous Linear Transponder Demonstration

KLETSkous LogoThis video shows a demonstration, given on May 24, 2014, of the KLETSkous 1U Cubesat amateur radio transponder.

A 435/145 Linear transponder is planned with a bandwidth of 20 kHz.

Currently the team are considering frequencies in the 435.100 to 435.140 MHz range for the uplink and 145.860 to 145.980 MHz for the downlink.

The scientific payload will be an experiment analysing “Worm Holes”. This experiment will try and find the portholes between Sun and Earth.

Further information at http://zr6aic.blogspot.co.uk/search/label/KLETSkous
and at http://www.amsatsa.org.za/

Watch KLETSkous 1U CubeSat Satellite Transponder Demo

SA AMSAT Turns to Innovation for its Cubesat

Southern Africa AMSAT LogoHans van de Groenendaal ZS6AKV gave a presentation “SA AMSAT Turns to Innovation for its Cubesat” at the 2013 AMSAT Space Symposium in Houston, Texas, on Saturday, November 2, 2013.

The mission aim of the KLETSkous Cubesat is to give Radio Amateurs in Southern Africa easy access to a Low Earth Orbit (LEO) satellite on as many of the available passes as possible. KLETSkous will carry a 435 to 145 MHz linear transponder and will carry a scientific experiment for school projects.

Hans also described another transponder opportunity with the Africa Resource Management Constellation of Satellites.

It is hoped that DynaCube, constructed by Interns at the Denel Dynamics Engineering Academy, will launch in 2014. The CubeSat will have downlinks on 145.980 MHz and 145.840 MHz and aims to explore the South Atlantic Anomaly during orbits over the area.

ZACube-1 is due to launch on November 21, 2013 with FUNcube-1 (they share the same launch pod). This CubeSat will carry beacons on 14.999 MHz and 437.345 MHz.

Watch ZS6AKV: SA AMSAT Turns to Innovation for its Cubesat (presentation at 2013 AMSAT Symposium)

KLETSkous https://amsat-uk.org/2013/01/12/sa-amsat-accelerating-the-kletskous-cubesat-project/

DynaCube https://amsat-uk.org/2013/03/30/dynacube-to-explore-the-south-atlantic-anomaly/

ZACube-1 https://amsat-uk.org/2012/08/25/14099-khz-cput-cubesat-to-launch-end-of-november/