WARP DRiVE for UK STRaND-1 CubeSat

Dr Chris Bridges working on STRaND

Dr Chris Bridges working on STRaND

The SSTL Space Blog reports on WARP DRiVE (Water Alchohol Resistojet Propulsion system), a novel new propulsion system that will help the STRaND-1 cubesat to perform manoeuvres. STRaND-1 is the first cubesat to have two types of propulsion system. As well as the WARP DRiVE, it will be equipped with a pulsed plasma thruster system which will provide full-axis control with low power, mass and volume requirements.

WARP DRiVE works by pushing water alcohol out of a tiny hole (just 0.2mm across) to produce thrust. The main advantage of this system is that it’s much smaller than regular space propulsion systems measuring in at about the same width as a drinks coaster. The WARP DRiVE will also provide more thrust than other similar systems whilst maintaining a comparable specific impulse (the efficiency of the propulsion system).

Read the SSTL Space Blog at http://www.sstl.co.uk/Blog/January-2013/WARP-speed-ahead

STRaND stands for Surrey Training, Research and Nanosatellite Demonstration and the programme is intended to be a long-term arrangement between the space company SSTL and academic researchers at the Surrey Space Centre (SSC), with STRaND-1 the first of a long line of STRaND nanosatellites.

STRaND-1 aims to carry a NEXUS Android Smartphone into space and plans to use data rates of 9k6 or 19k2 bps for the AX.25 packet radio downlink on 437.575 MHz. A software-based speech synthesiser will be included to pay homage to the UOSAT family of satellites.

The SSTL employees involved with the STRaND programme are volunteers. It is a condition of the programme that volunteers from SSTL and SSC use their own, free time for STRaND activities (such as lunches and breaks). The project has no budget for staff so is entirely dependent on volunteers.

To watch a presentation about STRaND-1 given by Dr. Chris Bridges to the AMSAT-UK 2012 International Space Colloquium following these steps:
• Go to http://www.batc.tv/
• Click on “Film Archive
• Select “AMSAT 2012″ in the Category box and click on Select Category
• Select “A03 – STRaND-1” in the Stream box and click on Select Stream
• Click the play button on the video player window

The videos can be downloaded for later use, for instance at a club meeting, by clicking on the “Click Here” link underneath the video player.

STRaND-1 CubeSat & BBC Stargazing Live

STRaND-1 CubeSat Plasma Propulsion Test

STRaND-1 CubeSat Plasma Propulsion Test Firing

BBC TV have been filming at the Surrey Space Centre (SSC) and Surrey Satellite Technology Limited (SSTL) for an item on the STRaND-1 CubeSat mission for Stargazing Live.

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Smartphone and Kinect Satellite Presentations at Guildford

Dr Christopher Bridges (2nd from left) discussing why space is cool on Sky News

Dr Chris Bridges recently appeared on the nationwide TV channel Sky News discussing why space is cool. On September 15-16 he will be giving two presentations to the AMSAT-UK International Space Colloquium at the Holiday Inn, Guildford, GU2 7XZ.

Chris will cover the Nexus Android Smartphone amateur radio satellite STRaND-1 which will carry both a Resistojet and a Pulsed Plasma Thruster (PPT) module and STRaND-2 which comprises two 3U CubeSats that will use Microsoft Xbox Kinect controller technology for docking.

UPDATE: For videos of the two STRaND presentations see http://www.uk.amsat.org/?p=10297

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VE3NML works on STRaND solar panels

The UK STRaND nanosat team have released this picture in which a volunteer from SSTL, Nimal Navarathinam VE3NML, finishes laying down the cells for the Earth-facing and Space-facing solar panels.

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STRaND-2 and OSCAR-5 in SatMagazine

The STRaND-2 nanosats feature in the June issue of the free publication SatMagazine.

These innovative satellites, being developed in the UK by the University of Surrey and SSTL, feature on pages 25 and 26 of the magazine

Additionally on page 71 there is a picture of the satellite OSCAR-5 that was built by radio amateurs at the University of Melbourne, Australia.

Download the June 2012 SatMagazine at http://www.satmagazine.com/2012/SM_Jun2012.pdf

SatMagazine http://www.satmagazine.com/

STRaND-2 ‘Kinect’ Satellites Video http://www.uk.amsat.org/7851

Surrey Satellite to put Xbox parts in space http://www.uk.amsat.org/7771

‘Kinect’ STRaND-2 at UK Space Agency Conference http://www.uk.amsat.org/6795

Live Coverage of HORYU-II Launch May 17

Amateur Radio Satellite HORYU-2

The launch of amateur radio satellite HORYU-2 on Thursday, May 17 at 1639 UT will be broadcast live on the Internet. On the same launch will be the JAXA climate observation satellite SHIZUKU (GCOM-W).

The launch broadcast will commence at 1610 UT and can be seen at http://www.jaxa.jp/countdown/f21/live/index_e.html

Built by students at the Kyushu Institute of Technology (KIT) HORYU-2 is 350 * 310 * 315 mm and mass is 7.1 kg. It will be launched into a Sun-Synchronous 680 km orbit with an inclination of 98.2°.

The satellite’s callsign is JG6YBW and radio amateurs are asked to listen for the 437.375 MHz  (+/- 9 kHz Doppler shift) telemetry downlink that will be using 20 wpm Morse Code or 1200 bps AX.25 FSK packet radio. Details of the telemetry format are available here.

There will be a monthly competition for radio amateurs and listeners who send data received from the telemetry to the KIT server, via the HORYU-2 telemetry analysis software, details here.

The HORYU-2 telemetry software can be downloaded from here and an explanation of the software is here.

Keplerian Two Line Elements (TLEs / KEPS) for new satellites launched in past 30 days

Amateur satellite Keplerian Two Line Elements (TLEs / KEPS) http://celestrak.com/NORAD/elements/amateur.txt

Among the experiments to be carried out on HORYU-2 are:

HORYU-2 discharge suppression solar cell side

300V power generation in LEO
In recent years, satellite size and power keep increasing. For large space platforms such as a space station, it is necessary to generate and transmit the power at a high voltage to minimize the Joule heating loss or the increase in the cable mass. It has been known that in LEO a solar array with a negative potential of 100 to 200V with respect to the plasma can suffer electrostatic discharge. Because of this, ISS power system was limited to 160V generation and 120V transmission. Generally speaking the transmission power is proportional to the square of the voltage. For a large space platform which requires 1MW-class power, such as a space hotel or a space factory, power generation at a voltage of 300 to 400V is required. The present HORYU-2 mission, 300V power generation in space without any discharge, is the first space environment test of the new technology that will be strongly demanded in near future. Also, as the satellite power employs higher voltage, there will be more demand for spacecraft charging mitigation.

Horyu-2 Structural Thermal Model

Horyu-2 Structural Thermal Model

Demonstration of COTS surface potential meter in space (Trek)
This mission demonstrates a surface potential meter in space. The potential meter has been developed by TREK, Inc. aiming for terrestrial commercial application. It is a contact type potential meter with extremely large input impedance so that the contact does not affect the charging state of the specimen. KIT is currently working with TREK, Inc. to convert the potential meter for extreme environments such as space or plasma processing chamber. The in-orbit demonstration is a part of the joint research program. To put the COTS device on HORYU-2, the electronics board and the consumed power have been reduced significantly.

When HORYU-2 passes through the aurora zone, differential charging may develop between the insulator surface and the satellite chassis. The potential meter will measure the potential of the insulator that is the same material to be used for SCM. The two measurements are compared to validate against each other.

Debris observation with debris sensor
This mission aims at detecting the micro-debris impact on the surface of HORYU-2. Space debris has become a serious threat to satellites in orbit. Observation of micro debris less than 1mm has been very difficult. The debris sensor consists of many conductive thin wired laid down in parallel in the area of 8×8 cm. Upon impact, some of the lines are cut and the resistance becomes infinite.

Taking photographs of the Earth
HORYU-2 aims to take pictures of the Earth using a small CMOS camera. The camera is called SCAMP (Surrey Camera Payload) and was developed by the University of Surrey, a sister university of KIT. SCAMP takes a JPEG format picture of 640×480 pixels. From 700km altitude, one pixel corresponds to 1.6km.

HORYU-2 Launch Information http://kitsat.ele.kyutech.ac.jp/Documents/information_launch_english.html

English language version of HORYU website http://kitsat.ele.kyutech.ac.jp/index_e_new.html

Japanese HORYU website in Google English http://tinyurl.com/HoryuSatellite

KIT HORYU Blog in Google English http://tinyurl.com/HORYU-Blog

Development of High Voltage Technology Demonstration Satellite, HORYU-2

KIT HORYU-2 Facebook Group https://www.facebook.com/groups/277436165678985/

HORYU-2 Japanese Operating Schedule http://tinyurl.com/HORYU-2-Schedule

HORYU-2 Telemetry Competition http://www.uk.amsat.org/7474

HORYU-2 CW Telemetry Decoder by DK3WN http://tinyurl.com/SatSoftwareDK3WN/

SimpleSatLookDown satellite tracking software http://www.uk.amsat.org/?p=8217

MixW http://mixw.net/

UZ7HO Packet Radio Soundmodem http://wa8lmf.net/miscinfo

AGWPE Soundcard packet download page http://www.sv2agw.com/downloads/

Sound Card Packet Guide by Ralph Milnes KC2RLM

Sound card Interface http://www.southgatearc.org/articles/g0ftd/data_dummy_interface.htm

UISS Windows AX.25 Packet Software http://users.belgacom.net/hamradio/uiss.htm

DK3WN satellite decode software http://tinyurl.com/SatSoftwareDK3WN/