Look out for ISS SSTV 26 to 31 December 2021. 145.800 MHz mode PD 120 (FM). See Twitter for latest updates!
Author: SM0TGU
Webmaster and member of the AMSAT-SM steering group.
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CAS-9 XW-3 launch Dec 26 2021
Updated info 22 dec from Alan Kung, BA1DU:
Hello OM,
The CAMSAT XW-3 (CAS-9) amateur radio satellite will be launched at UTC 03:11:31 on 2021-12-26 , and will be deployed at 98.858° east longitude and 28.413° north latitude at UTC 03:35:58, location close to Western Australia.
Radio amateurs will receive CW beacon and GMSK telemetry signals approximately 38 seconds after the satellite is separated from the launch vehicle, and then the linear transponder will be put into use after approximately 49 seconds.
Attached is the launch schedule and the Two-Line Orbital Element file.
73!
Alan Kung, BA1DU
XW-3(CAS-9)
1 99999U 21360.14997609 .00000032 00000-0 10363-4 0 00007
2 99999 098.5836 072.3686 0004232 307.2415 261.3002 14.38559758000156
This is an example how a pass can look like over north NA and EU:
According to info from ANS-353 and BA1DU, Alan Kung, CAMSAT XW-3(CAS-9) amateur radio satellite will be launched by Chinese CZ-4C Y39 launch vehicle on December 25, 2021 from the Taiyuan Satellite Launch Center in China. XW-3(CAS-9) satellite will be piggybacked on the rocket with primary payload ZY-1(02E) satellite.
The satellite orbit is a circular sun-synchronous orbit with an altitude of 770.1 kilometers and an inclination of 98.58 degrees, the running cycle is 100.14 minutes. The functions of XW-3(CAS-9) satellite include UHF CW telemetry beacon, GMSK telemetry data transmission, V/U mode linear transponder, a visible light band space camera and an experimental thermoelectric generator for high school students. After the satellite completes the in-orbit test and works normally, the space camera photo download will be open to amateur radio enthusiasts all over the world.
When the relevant remote control command is received by the satellite, the GMSK telemetry channel will be used to downlink the photo storage information and photo data, and the telemetry data will stop sending at that time.
XW-3(CAS-9) satellite adopts a 6U CubeSat structure with a mass of about 10kg, an onorbit envelope size of 340.5×121.76x998mm with four solar array panels and a threeaxis stabilized attitude control system is used, long-term power consumption is about 15.2 Watts.
Technical specifications:
● VHF antenna: 1/4 wavelength whip antenna
● UHF antenna: 1/4 wavelength whip antenna
● CW telemetry beacon:
Frequency: 435.575MHz RF power: 20dBm CW rate: 22wpm
● GMSK telemetry:
Frequency: 435.725MHz RF power: 23dBm Data rate: 4800bps
● V/U mode linear transponder:
Uplink frequency: 145.870MHz
Downlink frequency: 435.180MHz
RF power: 20dBm Bandwidth: 30kHz Spectrum inverted
AMSAT-SM has decided to unlock all web pages for all visitors of amsat.se
For many years we had have some pages only for registered members – as from now all of these pages are unlocked. For example you can now download all old issues of the newsletter AMSAT-SM Journal.
Source: ARRL and OMOTENASHI Project
Japan’s OMOTENASHI, the world’s smallest moon lander, will have an X-band and UHF communication system, although it will not carry an amateur band transponder. OMOTENASHI is a 6U CubeSat set for launch via a NASA SLS rocket as early as February 2022. It will have a mission period of from 4 to 5 days. The name is an acronym for Outstanding Moon Exploration Technologies demonstrated by Nano Semi-Hard Impactor. Wataru Torii of the Japan Aerospace Exploration Agency (JAXA) Ham Radio Club, JQ1ZVI, said radio amateurs can play a role in gathering data from the spacecraft.
The spacecraft is made up of two separable components, both having independent communication systems — an orbiting module and a surface probe. The orbiting module will take the surface probe to the moon. It will transmit beacon or digital telemetry data on UHF (437.31 MHz). The surface probe — the moon lander — will transmit digital telemetry or three-axis acceleration analog-wave with FM modulation on UHF (437.41 MHz). Transmitter power will be 1 W in both cases.
“If we succeed in receiving the UHF signal from the surface probe, we could know the acceleration data on the impact on the moon and the success of the landing sequence,” Torii explained.
“We already have a station for uplink and downlink at Wakayama in Japan — used as an EME [moonbounce] station. However, if the satellite is invisible from Japan, we cannot receive the downlink signal. So, we need a lot of help from ham radio stations worldwide.” Torii noted that the RF system on the lander only operates on UHF.
The orbiting module beacon will transmit on 437.31 MHz using PSK31. The surface probe beacon will transmit on 437.41 MHz using FM, PSK31, and PCM-PSK/PM.
During the last years more and more visitors to the AMSAT-SM website are from outside Sweden. So, we have decided to change the site language from swedish to english. This means:
- WordPress main site language is now english
- The menus are now in english or a combination of english and swedish
- If a page is only in swedish, you can see a comment in the menu link xxxx (Swe) . For example see the image above.
- In most of the main pages, you will now see a description in both swedish and english
- Most of the new “How to…” posts are written only in english
- The longer posts about “Getting started in amateur satellites” will only be in swedish, because there are a lot of good sites in english about this subject, for example from AMSAT-NA and AMSAT-UK
Jag hade förmånen att få hålla ett föredrag om satelliter hos SK5UM Flen i november 2021. SK5UM, som är min “moderklubb” då jag ursprungligen kommer från Flen, är en liten klubb med imponerande utrustning och aktiviteter. De driver flera repeater och en Winlink-station. Dessutom i en egen klubbstuga.
Många intressanta frågor fick jag vilket är extra kul. Åter igen – tack!
/Lars Thunberg SM0TGU