Tag Archives: Nexus

Jan 30 2019

NEXUS CubeSat designated as Fuji-OSCAR 99

NEXUS PosterOn January 18, 2019, NEXUS was launched on an Epsilon launch vehicle from the JAXA Uchinoura Space Center in Japan.

NEXUS (NExt generation X Unique Satellite) is a satellite developed jointly by Nihon University College of Science and Technology and the Japan Amateur Satellite Association (JAMSAT).

NEXUS demonstrates several new amateur satellite communication technologies, and includes a mode V/u linear transponder.

Telemetry has been received and decoded around the world since the launch, and the transponder was successfully tested on January 26th.

More information may be found at
http://sat.aero.cst.nihon-u.ac.jp/nexus/E0_Top.html

At the request of the Nihon University College of Science and Technology and JAMSAT, AMSAT hereby designates NEXUS as Fuji-OSCAR 99 (FO-99). We congratulate the owners and operators of FO-99, thank them for their contribution to the amateur satellite community, and wish them continued success on this and future projects.

73, Drew Glasbrenner, KO4MA
AMSAT VP Operations / OSCAR Number Administrator

Frequencies:
• 437.075 MHz CW Telemetry
• 435.900 MHz FSK AX.25 / π/4 shift QPSK CCSDS
• SSB/CW transponder
– 145.900-145.930 MHz Uplink
– 435.880-435.910 MHz Downlink

NEXUS Blog http://tinyurl.com/NEXUS-Sat-Blog

JAMSAT in Google English http://tinyurl.com/JAMSAT

IARU Frequency Coordination http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=535

Aug 24 2014

NEXUS CubeSat Will Have Mode-J Transponder

JAMSAT stand at the Tokyo Ham Radio Fair August 2014

JAMSAT stand at the Tokyo Ham Radio Fair August 2014

The Japan AMSAT Association (JAMSAT) and students at the Nippon University are jointly developing a CubeSat called NEXUS which will have a 145 to 435 MHz (Mode-J) transponder and a 38 kbps data downlink.

JAMSAT CubeSat Board

JAMSAT CubeSat Board

Nippon University students have previously developed the SEEDS and SPROUT satellites. NEXUS is an achronym of “Next Education X (cross) Unique Satellite”, it will be 1U CubeSat with a mass of between 1 and 1.5 kg.

The NEXUS team hope to:
● Provide amateur radio communications via the 145/435 MHz transponder and SSTV
● Download pictures from the 640×480 pixel camera
● Operate the data downlink at 38400 bps QPSK
● Compare the performance of the data downlink when using AFSK, GMSK and QPSK modes

The launch is expected to take place on January 17, 2019.

NEXUS website in Google English http://tinyurl.com/NEXUS-Satellite

NEXUS Blog http://tinyurl.com/NEXUS-Sat-Blog

JAMSAT in Google English http://tinyurl.com/JAMSAT

Mar 22 2013

STRaND-1 Update – Ground Station Improvements Underway

STRaND-1 Ground Station Antennas

STRaND-1 Ground Station Antennas

Surrey Space Centre report that the STRAND-1 satellite is healthy but they have had new ground station teething problems. That has diverted effort and delayed the eagerly awaited switch-on of the Google Nexus One smartphone carried by the CubeSat.

The team are currently scouting University of Surrey rooftops for a better antenna position for STRaND-1.

The STRaND-1 downlink frequency is 437.568 MHz using 9k6 bps AX.25 packet radio. Details of the telemetry format are at https://amsat-uk.org/satellites/strand-1/strand-1-telemetry/

Surrey Space Centre https://www.facebook.com/pages/Surrey-Space-Centre/147861435274871

Follow Surrey Space Centre https://twitter.com/SpaceAtSurrey

Feb 28 2013

Antares-110 Amateur Radio CubeSat Integration Completed

Antares-110 CubeSat Integration - Image Credit Spaceflight Inc

Image Credit Spaceflight Inc

Several CubeSats carrying amateur radio payloads are planned to launch on the Antares-110 mission in April.

On the CubeSat mailing list Jason Andrews President and CEO of both Spaceflight Inc and Andrews Space posted:

Spaceflight Inc recently completed CubeSat integration activities for the Antares demonstration mission including deployment dress rehersal.  Spaceflight has two ISIPod deployers on this mission.  One contains three 1U spacecraft for NASA Ames Research Center and the other contains a 3U spacecraft for a commercial customer.  An image of the integration activity can be found here:

https://twitter.com/SpaceflightInc/status/306880665624924161/photo/1

Among the amateur radio CubeSats on the launch are three Phonesats which will all carry Google Nexus smartphones similar to the pioneering UK smartphone satellite STRaND-1 that was launched in February. There will be two PhoneSat 1.0’s and one PhoneSat 2.0 on the launch.

PhoneSat 1.0 cost about $3500 and is built around the Nexus One smartphone, it operates on battery power only with a mission lifetime of approx 1 week.

PhoneSat 2.0 is more expensive at $8000. It is built around the Nexus S smartphone and has solar panels on each face and a mission lifetime until de-orbit of approximately 2 weeks.

The IARU amateur satellite frequency coordination panel have coordinated frequencies of 437.425 MHz and 2401.2-2431.2MHz for the PhoneSats.

Also on the launch is the Dove-1 CubeSat. The Antares-110 launcher is expected to deploy the satellites into a 250 km 51.6° inclination orbit.

Feb 22 2013

Watch Live Video of UK STRaND-1 Smartphone Satellite Launch

The STRaND-1 build and test phase took just 3 months

The STRaND-1 build and test phase took just 3 months

The UK smartphone satellite STRaND-1 is expected to launch from India on Monday, Feb. 25 at 12:25 GMT. You can follow the launch on Twitter or watch live video.

STRaND-1 and other CubeSats carrying amateur radio payloads are planned to launch on the ISRO PSLV-C20 rocket into a 785 km orbit.

STRaND-1 carries an amateur radio 9600 bps AX.25 packet radio downlink on 437.568 MHz. It is hoping to be the first ever satellite to carry a smartphone into space and is also believed be the first satellite to use a part produced with a 3D Printer.

On Twitter the Surrey Space Centre @SpaceAtSurrey tweeted:

Official launch hashtag of STRaND-1 spacecraft is #S1Launch. Post launch we will be using #STRaND1 hashtag. Launch time:12.25 GMT 25th Feb 2013 #UniOfSurrey #SSTL

Launch Authorisation Board (LAB) for PSLV – C20 @STRaND mission has cleared the launch on Monday, Feb 25, 2013. @university of surrey #S1Launch

Live video launch feeds for Monday’s PSLV launch http://www.webcast.gov.in/live/ and http://ibnlive.in.com/livetv/

Launch times can and do change at the last minute so follow Twitter for the latest information.

Follow Surrey Nanosats https://twitter.com/SurreyNanosats

Read more about STRaND-1 at http://www.amsat-uk.org/?page_id=12196

STRaND-1 telemetry format http://www.amsat-uk.org/?page_id=12875

STRaND-1 videos http://www.amsat-uk.org/?page_id=12472

Other satellites on the same launch http://www.amsat-uk.org/?p=12180

STRaND-1 on Facebook https://www.facebook.com/nanosats

Provisional initial track of STRaND-1

Provisional initial track of STRaND-1

Feb 19 2013

JAMSAT 2013 Symposium in Tokyo

tokyo

JAMSAT announces their 2013 Symposium to be held in Tokyo on March 9  to March 10. The Symposium will be held at the National Museum of  Emerging Science and Innovation (Miraikan) – 7F Conference Room CR2. All amateur radio satellite operators are welcome to attend.

The Symposium schdule will be:

March 9 • 14:30 – 17:00 Papers and Technical Presentations • 17:30 – 19:30 Dinner Party

March 10 • 10:00 – 13:00 Papers and Technical Presentations

The list of technical topics includes: • Problem of 1.2GHz Band License • Interference with QZSS Satellite • FitSAT Report • JAMSAT Activities • Progress in Transponder and 38.4Kbps Transmitter • Noise Environment at 2.4GHz Band • Progress in Nippon University Cubesat “NEXUS” • Introduction to AMSAT-NA FOX-Project • SDR and Satellite Communication

Openings remain available for the addition of last minute presentations on topics pertaining to amateur radio in space. If you are interested in making a presentation please contact madoguchi@jamsat.or.jp or ja3gep@jamsat.or.jp

Information on the Museum meeting location can be accessed on-line: http://www.miraikan.jst.go.jp/en/

ANS, Mikio Mouri, JA3GEP of JAMSAT

Via http://www.southgatearc.org/index.htm