Tag Archives: Ham Radio

Oct 24 2017

Jordan’s first satellite – JY1-SAT

His Royal Highness Crown Prince Al Hussein bin Abdullah II with JY1-SAT CubeSat, October 23, 2017

His Royal Highness Crown Prince Al Hussein bin Abdullah II with JY1-SAT CubeSat, October 23, 2017

During the final satellite integration training for Jordan’s first satellite, JY1-SAT, the team was supported for the final stages of integration by His Royal Highness Crown Prince Al Hussein bin Abdullah II.

The spacecraft has been given to students of the Masar Initiative at the Jordan University of Science and Technology as part of the JY1-SAT mission support and training program under the Crown Prince Foundation given by ISIS – Innovative Solutions In Space and AMSAT-UK and AMSAT Netherlands.

JY1-SAT CubeSat

JY1-SAT CubeSat

The JY1-SAT mission was proposed by Jordanian students who participated in the first batch of the cooperation program with NASA, after which the interns had suggested the design and launch of the first Jordanian satellite CubeSat.

To build up the capability to design and develop such a first mission, the Crown Prince Foundation signed a support agreement with ISIS – Innovative Solutions In Space and the AMSAT Radio Amateur Societies of the UK and the Netherlands, for hardware and training support, building on ISIS’ and AMSAT’s experience with FUNcube radio amateur transponder missions.

As a special development for the JY1-SAT mission, AMSAT has expanded the capabilities of the FUNcube transponder to be able to transmit stored images reflecting the Jordanian culture and its historical heritage, along with a voice message recorded by the Crown Prince to be transmitted in space to receivers around the world.

The launch of the JY1-SAT, scheduled during the first half of next year, is in memory of His Majesty the late King Hussein, the first founder of the HAM Radio in Jordan and holder of call sign JY1.

JY1-SAT will have a linear, inverting, transponder downlinking between 145.855 & 145.875 MHz with the uplink between 435.100 & 435.120 MHz. The telemetry downlink will be on 145.840 MHz and be FUNcube compatible. A new Dashboard will be made available before the launch of JY1-SAT.

The Jordan Times – Crown Prince puts final touch on mini satellite project
http://www.jordantimes.com/news/local/crown-prince-puts-final-touch-mini-satellite-project

Oct 22 2017

Caution Urged in Using High Duty Cycle Digital Modes via Satellite

Amateur Radio Satellite FO-29

Amateur Radio Satellite FO-29

A report in ANS-288 discussed an experiment operating with the WSJT-X FT8 digital mode via satellite. Satellite operators have gained more experience with this mode over this past week.

As a result of on-the-air observation other satellite users planning to try FT8 or MSK144 modes via satellite are encouraged use caution using these modes and possibly avoid their use completely in light of problems.

Dave, KG5CCI wrote, “He noticed a very hard time getting into the transponder. The pass was nearly overhead, and the 3w-4w that is normally sufficient was barely cutting it. I also noticed it was ‘up and down’ alot, whereas some moments it was easy to get in, then it would be nearly impossible. There were also pockets of ‘noise’ all over the transponder, that sounded somewhat digital, but I just couldn’t place them.” Further investigation revealed that an MSK144 signal in the transponder passband was causing the problems.

Matthew, NJ4Y noted, “Experimentation isn’t the problem, too much power is. It’s bad enough on SSB, worse with CW, and killer on constant duty cycle modes like FT8.”

To gain a full understanding of the situation readers are encouraged to follow the amsat-bb message thread which can be accessed at http://www.amsat.org/pipermail/amsat-bb/2017-October/064896.html

Source: AMSAT News Service http://www.amsat.org/mailman/listinfo/ans

Oct 18 2017

CAS-4A and CAS-4B amateur radio linear transponders activated

CAS-4A and CAS-4B launch on CZ-4B

CAS-4A and CAS-4B launch on CZ-4B

On Wednesday, October 18, 2017 the amateur radio linear (SSB/CW) transponders on the CAS-4A and CAS-4B satellites were activated.

CAMSAT’s amateur radio payloads piggybacked on the optical remote sensing micro-satellites ZHUHAI-1 01 (OVS-1A / CAS-4A) and ZHUHAI-1 02 (OVS-1B / CAS-4B) that were launched at 0300 GMT on Thursday, June 15, 2017 from the Jiuquan Satellite Launch Center, on the CZ-4B launch vehicle. The primary payload of the launch was a hard X-ray modulation telescope satellite (HXMT).

Satellite CAS-4A/OVS-1A/ZHUHAI-1 01:
● Architecture: Micro-satellite
● Dimensions: 494Lx499Wx630H mm
● Mass: 55 kg
● Stabilization: three-axis stabilization system with its +Y surface facing the earth
● Primary Payload: optical Camera with 1.98m resolution

CAS-4A Orbit:
● Orbit type : Sun synchronization orbit
● Apogee: 524 km
● Inclination: 43°
● Period: 95.1 minutes

CAS-4A Amateur Radio Payload:
● Call sign: BJ1SK
● VHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at +Z side
● UHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at -Z side
● CW Telemetry Beacon: 145.855 MHz 17 dBm
● AX.25 4.8k Baud GMSK Telemetry: 145.835 MHz 20 dBm
● U/V Linear Transponder Downlink: 145.870 MHz 20 dBm, 20 kHz bandwidth, Inverted
● U/V Linear Transponder Uplink: 435.220 MHz

CAS-4 Satellite

CAS-4 Satellite

Satellite Name: CAS-4B/OVS-1B/ZHUHAI-1 02:
● Architecture: Micro-satellite
● Dimensions: 494Lx499Wx630H mm
● Mass: 55 kg
● Stabilization: three-axis stabilization system with its +Y surface facing the earth
● Primary Payload: optical Camera with 1.98m resolution

CAS-4B Orbit:
● Orbit type : Sun synchronization orbit
● Apogee: 524 km
● Inclination: 43°
● Period: 95.1 minutes

CAS-4B Amateur Radio Payload:
● Call sign: BJ1SL
● VHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at +Z side
● UHF Antenna: one 1/4λ monopole antenna with max. 0 dBi gain located at -Z side
● CW Telemetry Beacon: 145.910 MHz 17 dBm
● AX.25 4.8k Baud GMSK Telemetry: 145.890 MHz 20 dBm
● U/V Linear Transponder Downlink: 145.925 MHz 20 dBm, 20 kHz bandwidth, Inverted
● U/V Linear Transponder Uplink: 435.280 MHz

73!
Alan Kung, BA1DU

CAMSAT Press Release PDF

N2YO online real-time tracking:
CAS-4A http://www.n2yo.com/satellite/?s=42761
CAS-4B http://www.n2yo.com/satellite/?s=42759

CAS-4A and CAS-4B

Oct 16 2017

AMSAT-UK Colloquium Talks – Videos being added to YouTube

Working satellites with Arrow AntennasVideos of the presentations given at the AMSAT-UK International Space Colloquium, which was held as part of the RSGB Convention in Milton Keynes, October 14-15, are being made available on YouTube.

The first of the videos is ‘An introduction to Amateur satellites’ by David Johnson G4DPZ and Carlos Eavis G3VHF.

The PDF of the slides is here.

Other presentations are expected to be uploaded in the coming days.

Watch An introduction to Amateur satellites

PDF Slides of ‘An introduction to Amateur satellites’
https://amsat-uk.org/wp-content/uploads/2017/10/beginners-guide-to-amateur-satellites-by-dave-johnson-g4dpz.pdf

AMSAT-UK videos on YouTube https://www.youtube.com/user/AMSATUK/videos

Our thanks to the British Amateur Television Club and Wouter Weggelaar PA3WEG for their work in recording, editing and uploading these videos.

Oct 11 2017

Live streaming of talks from International Space Colloquium Milton Keynes

Kents Hill Park Conference Centre Milton Keynes MK7 6BZ

Kents Hill Park Conference Centre Milton Keynes MK7 6BZ

Thanks to volunteers from the British Amateur Television Club (BATC) the presentations given at the AMSAT-UK International Space Colloquium will be streamed live to a global audience.

This year the Colloquium is taking place as part of the RSGB Convention at the Kents Hill Park Conference Centre, Timbold Drive, Milton Keynes, MK7 6BZ on the weekend of October 14-15.

The webstream of the Colloquium talks will be available at https://beta.batc.tv/live/amsatuk
(The other talks at the RSGB Convention are not being streamed)

The Live Stream will begin on Saturday morning, October 14 at 9:30am BST (0830 GMT) with the presentation ‘Everything you wanted to know about Amateur Radio on the International Space Station (ARISS)’ by ARISS Contact Coordinator Kenneth Ransom N5VHO.

The AMSAT-UK Colloquium is talking place in Lecture Room 5 download the programme schedule from
http://rsgb.org/main/about-us/rsgb-convention/rsgb-convention-programme/

Tickets to the event are available at the door or you can book in advance at
http://rsgb.org/main/about-us/rsgb-convention/

Recordings of all talks will be posted on the AMSAT-UK YouTube Channel after the event
https://www.youtube.com/user/AMSATUK

British Amateur Television Club http://www.batc.org.uk/

Oct 11 2017

Geostationary Amateur Radio Transponder Talk and Demonstration

Coverage area of Es'hail 2

Coverage area of Es’hail 2

On Saturday, October 14 at 1:45pm BST (1245 GMT) AMSAT-DL President Peter Guelzow DB2OS will give a presentation on the Es’hail-2 Geostationary Satellite Amateur Radio Transponders to the AMSAT-UK International Space Colloquium in Milton Keynes.

It is expected the presentation will include a demonstration of the P4A transponder simulator. All attendees are welcome to bring any equipment they have for CW/SSB or DATV for the 2.4 GHz and 10.5 GHz bands. The transponder mimics the real thing: 2400-2410 MHz uplink to 10489.5-10499.5 MHz downlink.

This year the AMSAT-UK Colloquium is taking place as part of the RSGB Convention at the Kents Hill Park Conference Centre, Timbold Drive, Milton Keynes, MK7 6BZ on the weekend of October 14-15. Tickets to the event are available at the door or you can book in advance at
http://rsgb.org/main/about-us/rsgb-convention/

The Colloquium is talking place in Lecture Room 5, download the programme schedule from
http://rsgb.org/main/about-us/rsgb-convention/rsgb-convention-programme/

Live streaming of Colloquium talks https://amsat-uk.org/2017/10/11/live-streaming-space-colloquium-mk/