communication (Page 25)

XW-3 (CAS-9) Satellite Launch December 26

XW-3 (CAS-9) satellite

The CAMSAT XW-3 (CAS-9) satellite carrying a 145/435 linear transponder has been installed on the CZ-4C Y39 launch vehicle at the Taiyuan Satellite Launch Center. The launch is scheduled for 03:11:31 GMT on December 26.

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.

Deployment from the launcher will take place at  at 98.858° east longitude and 28.413° north latitude at 03:35:58 GMT, location close to Western Australia. Radio amateurs should 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.

Download the XW-3（CAS-9) Amateur Radio Satellite User’s Manual V1.0

Download the XW-3 (CAS-9) Amateur Radio Satellite Launch Time Sequence

Download the XW-3 (CAS-9) Two-Line Orbital Element file

Get The Details…

m5aka

AMSAT-UK

Powered by WPeMatico

CAS-9 / XW3 to launch December 25

XW-3 (CAS-9) satellite

The CAMSAT XW-3 (CAS-9) satellite carrying a 145/435 linear transponder has been installed on the CZ-4C Y39 launch vehicle at the Taiyuan Satellite Launch Center, launch is expected on December 25.

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.

Download the XW-3（CAS-9) Amateur Radio Satellite User’s Manual V1.0

Get The Details…

m5aka

AMSAT-UK

Powered by WPeMatico

ISS SSTV in late December

The ARISS team will be supporting Slow Scan TV (SSTV) operations from the International Space Station during the period of December 26-31.

The images will be related to lunar exploration. The transmissions should be available worldwide on 145.800 MHz FM. The planned SSTV mode is PD 120.

Planned start and stop times are currently listed as:
Start – Dec 26 about 18:25 GMT
Stop – Dec 31 about 17:05 GMT

The signal should be receivable even on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

Check the ARISS SSTV blog for the latest information http://ariss-sstv.blogspot.com/

ARISS SSTV Award https://ariss.pzk.org.pl/sstv/

The signal from the ISS should be receivable outdoors on a handheld with a 1/4 wave whip although tracking the ISS with a small handheld beam will give better results. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

You can get predictions for the ISS pass times at https://www.amsat.org/track/

Useful SSTV info and links https://amsat-uk.org/beginners/iss-sstv/

Get The Details…

m5aka

AMSAT-UK

Powered by WPeMatico

FUNcube-1 (AO73) Celebrating eight years in orbit!

FUNcube-1 Telemetry as at Nov 21, 2021

November 21, 2021, marks the eighth birthday of the FUNcube-1 CubeSat. Remarkably the tiny spacecraft, launched from Russia on November 21, 2013, continues to work well having travelled more than a billion kilometres in space.

During the past couple of months, the spacecraft’s orbits have been running just along the edge of the terminator. Initially we had effectively full sun with no eclipses but at the beginning of this month it appears that the solar panels were not receiving enough solar radiation to keep the battery fully charged.

FUNcube-1 was transmitting continuous high-power telemetry and was therefore consuming maximum power. The screenshot above is from the AMSAT-UK/BATC groundstation at Goonhilly Earth Station. The FUNcube Dashboard shows the rapid decline in the bus voltage from an already below normal 8.0V down to 7.8V. The spacecraft was switched to “safe” mode on the afternoon of November 18th. This reduced to total power consumption by almost 50% and, as can been seen, the spacecraft is again in a happy “power positive” situation.

Although safe mode provides less than 20mW of downlink RF, it is remarkable how many stations are still receiving and decoding the 1k2 BPSK telemetry. This is a good point at which to say a massive thank you to the many many stations around the world who, even after eight years, are continuing to submit their data to the FUNcube Data Warehouse. It really is valuable to the team and has really helped us to understand what is going on up there!

We will continue to monitor the telemetry over the next few weeks and plan to return FUNcube-1 to nominal autonomous operation, with the transponder on when the spacecraft is in eclipse, as soon as possible.

Interestingly, it appears that we will not be having any more “full sunlight” periods for the foreseeable future., however those that we have experienced have provided some good data on how hot a 1U CubeSat can become in such circumstances!

Get The Details…

m5aka

AMSAT-UK

Powered by WPeMatico

ISS SSTV Dec 1-2 145.800 MHz FM

ISS SSTV MAI-75 image 9/12 received by Chertsey Radio Club on Baofeng handheld

Russian cosmonauts on the International Space Station (ISS) are planning to transmit Slow Scan TV images on 145.800 MHz FM using the SSTV mode PD-120.

The transmissions are part of the Moscow Aviation Institute SSTV experiment (MAI-75) and will be made from the amateur radio station RS0ISS in the Russian ISS Service module (Zvezda) using a Kenwood TM-D710 transceiver.

December 1, 2021 (Wednesday) from 12:10 GMT until 19:10 GMT*

December 2, 2021 (Thursday) from 11:40 GMT until 17:20 GMT*

*Dates and times subject to change.

The signal should be receivable on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

You can get predictions for the ISS pass times at https://www.amsat.org/track/

ARISS SSTV Blog https://ariss-sstv.blogspot.com/

Useful SSTV info and links https://amsat-uk.org/beginners/iss-sstv/

Get The Details…

m5aka

AMSAT-UK

Powered by WPeMatico