May 20, 2018

CAMSAT amateur radio transponder satellites to launch this year

CAMSAT has released details of three new amateur radio satellites, CAS-5A, CAS-5B and CAS-6, that are hoped to launch in September 2018. Two of the satellites CAS-5A and CAS-6 will carry transponders.

CAS-5A a 6U CubeSat which will include the following capabilities:
• HF/HF – H/T Mode Linear Transponder
• HF/UHF – H/U Mode Linear Transponder
• HF – CW Telemetry Beacon
• VHF/UHF – V/U Mode Linear Transponder
• VHF/UHF – V/U Mode FM Transponder
• UHF – CW Telemetry Beacon
• UHF – AX.25 4.8k/9.6k Baud GMSK Telemetry.
The transponders will have 30 kHz bandwidths except the H/U one which will be 15 kHz. Planning a launch in September 2018 from the Jiuquan Satellite Launch Center into a 539×533 km 97.5 degree orbit.

CAS-5B a femto-satellite architecture 90Lx80Wx50H mm with a mass of 0.5kg Proposing a UHF CW beacon and to be deployed from CAS-5A when in space.

CAS-6 a 50 kg micro satellite approx 490 x 499 x 430 mm. It will include:
• VHF CW Telemetry Beacon
• U/V Mode 20 kHz Linear Transponder
• AX.25 4.8k baud GMSK telemetry downlink
• Deployable Antennas
• Solar Panels, Lithium ion battery and power controller
• Integrated Housekeeping Unit
• Three-axis stabilization system
• Atmospheric Wind detector
• S-band TT&C system (non-amateur radio band)
• X-band Data link system (non-amateur radio band)
Planning a Sea Launch Pad from the China Academy of Launch Vehicle Technology in September 2018 into a 579 x 579 km 45 degree orbit.

source AMSAT-UK

Hexadecimal -> file vis Falaconsat-1


Falconsat-3 satellite.Telemetry .


DSLWP Lunar Amateur Radio Satellites Launch May 21




Hu Chaoran BG2CRY tests 435/2250 MHz dish feed for DSLWP ground station – Image credit Wei Mingchuan BG2BHC 

Two microsatellites DSLWP-A1 and DSLWP-A2 carrying amateur radio payloads are planned to launch with the Chang’e 4 Relay satellite on a CZ-4C from the Xichang Space Center into lunar orbit early Monday, May 21 Beijing time (2100 GMT May 20).Wei Mingchuan BG2BHC reports DSLWP is a lunar formation flying mission for low frequency radio astronomy, amateur radio and education, consists of two microsatellites.
Developed by students at the Harbin Institute of Technology the amateur radio payload onboard DSLWP-A1 will provide telecommand uplink and telemetry / digital image downlink. An open telecommand is also designed to allow amateurs to send commands to take and download an image.
The satellites are 50x50x40 cm with a mass of about 45 kg and are 3-axis stabilized. Two linear polarization antennas are mounted along and normal to the flight direction.
The downlinks for DSLWP-A1 are 435.425 MHz and 436.425 MHz while downlinks for DSLWP-A2 are 435.400 MHz and 436.400 MHz using 10K0F1DCN or 10K0F1DEN. Will use 250/500 bps GMSK with turbo code or JT4G. Uplinks are reported to be in the 144 MHz band.



Read more
 https://amsat-uk.org/2018/04/03/dslwp-lunar-amateur-radio-satellites/
https://twitter.com/bg2bhc
https://www.chinaspaceflight.com/satellite/HIT/DSLWP-A1-A2.html
http://www.asahi-net.or.jp/~ei7m-wkt/numbr999.htm

May 16, 2018

Small Asteroid (2010 WC9 ) to Fly Between Earth and Moon

Asteroid 2010 WC9 will make a close approach to Earth today (5/15/18) at 3:04 p.m. PDT (6:04 p.m. EDT, 22:04 UTC). At the time of closest approach, the asteroid will be no closer to Earth’s surface than about 120,000 miles (200,000 kilometers), which is about half the distance between Earth and the Moon. 2010 WC9 is about 200 to 400 feet (50 to 120 meters) across. The asteroid's velocity at the time of closest approach will be about 29,000 mph (8 miles per second, 12.8 kilometers per second). This flyby is the closest approach 2010 WC9 will make to Earth for at least two centuries.
Asteroid 2010 WC9 was discovered on Nov. 30, 2010, by the NASA-sponsored Catalina Sky Survey near Tucson, Arizona, and was tracked for about 10 days before it faded from view. Orbit calculations in 2010 ruled out any chance that the asteroid could pose a threat to our planet in 2018, but the distance of this year's close approach could not be predicted precisely until the asteroid was detected again last week as it approached our planet once again.



source  NASA

May 13, 2018

Irazu , 1KUNS PF, UBAKUSAT - short movie clip

Three CubeSats, Irazu (Costa Rica), 1KUNS-PF (Kenya) and UBAKUSAT (Turkey) heard over Africa with very stable strong signal .


May 12, 2018

Irazu , 1KUNS-PF, UBAKUSAT heard over Africa

The 3 new   three CubeSats, Irazu (Costa Rica), 1KUNS-PF (Kenya) and UBAKUSAT (Turkey)  heard over Africa with very stable strong signal .