IARU Amateur Satellite Frequency Coordination
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IARU Amateur Satellite Frequency Coordination |
| CAS-11 | Updated: 16 Nov 2024 | Responsible Operator | Alan Kung BA1DU | |
| Supporting Organisation | Chinese Amateur Satellite Group (CAMSAT) | |||
| Contact Person | alankung@vip.sina.com.nospam | |||
| Headline Details: A 6U CubeSat. Payloads include HF/UHF - H/U Mode Linear Transponder, VHF/UHF - V/U Mode Linear Transponder, VHF/UHF - V/U Mode FM Transponder, VHF/UHF - V/U Mode digital store-and-forward Transponder, UHF - CW Telemetry Beacon and UHF telemetry beacon using AX.25 4.8k/9.6kbps GMSK. The CAS-11 satellite will be equipped with a 2.45GHz multi-mode amateur radio satellite beacon transmitter, which is designed and built by university students, high school students and primary school students from Beijing Donggaodi Science and Technology Museum and Beijing University of Posts and Telecommunications under the guidance of CAMSAT, aiming to cultivate students’ knowledge, skills and interests in amateur radio satellites. All transmission modes operate at 2.4 GHz, and the working modes are converted by the on-board computer program and ground remote control commands. It can work in the following modes: CW Telemetry Beacon, FT8 Telemetry Beacon, PPM Telemetry Beacon or USB/SSTV Robot36, PD120 1. CAS-11 carries three VHF uplink and UHF downlink transponders, including a linear transponder with a bandwidth of 30kHz, an FM transponder and a digital store-and-forward transponder. 2. CAS-11 carries a linear transponder with a bandwidth of 15kHz for HF uplink and UHF downlink. 3. CAS-11 carries a basic CW beacon, which operates in the 70cm band and uses Morse code to send satellite telemetry data, which is a popular feature in the amateur radio community. The above transponders and beacon will work 24/7 when the satellite power supply is sufficient. Amateur radio enthusiasts around the world can use it for two-way radio relay communication, data storage and forwarding communication, and receive satellite CW beacons. 4. CAS-11 carries three cameras, and the photos it takes are stored in the flash memory on the satellite. We have designed a simple remote control system based on DTMF commands. Amateur radio enthusiasts around the world can send DTMF commands to download the photo catalog and all photos taken by all cameras. 5.CAS-11 carries an experimental payload, which is a multi-mode amateur radio beacon transmitter. This device is designed and produced by university students, high school students and elementary school students from Beijing Donggaodi Youth Science and Technology Museum and Beijing University of Posts and Telecommunications under the guidance of CAMSAT. This is an unprecedented satellite project in China. It has brought opportunities for learning and practicing amateur radio and amateur satellites to students of all grades from elementary school to university, and promoted the application of amateur radio in space. This 2.45GHz experimental beacon transmitter can switch to transmit 5 different modes of radio signals, and it will work continuously when the satellite is fully powered. Proposing the following bandwidths and data rates: V/U Mode Linear Transponder: 30kHz bandwidth, V/U Mode FM Transponder: 16kHz bandwidth, V/U Mode Digital Transponder AX.25 GMSK Downlink:4.8kbps, H/U Mode Linear Transponder:15kHz bandwidth, 70cm CW Telemetry Beacon:22wpm, 70cm AX.25 4.8k/9.6kbps GMSK Telemetry: 4.8k/9.6kbps, 13cm Multi-mode Beacon with a CW Telemetry Beacon 22wpm or FT8 Telemetry Beacon 11.6bps, or PPM Telemetry Beacon 138bps or USB/SSTV Robot36, PD120. Planning a launch in September 2025 into a 536 km polar orbit from Haiyang Sea Launch Platform, Shandong, China **The following frequencies have been coordinated. Downlink frequencies: -for H/U linear transponder 435.505 MHz, EIRP 24 dBm -for V/U linear transponder 435.540 MHz, EIRP 24 dBm -for telemetry beacon 435.570 MHz, EIRP 23 dBm -for V/U FM transponder 435.600 MHz, EIRP 24 dBm -for GMSK telemetry 435.650 MHz,EIRP, 27 dBm -for GMSK digital S/F transponder 435.700 MHz, EIRP 24 dBm -for multi-mode beacon 2405.500 MHz, EIRP 27 dBm. Uplink frequencies: -for V/U linear transponder 145.860 MHz, -for V/U FM transponder 145.925 MHz, -for AFSK digital S/F 145.895 MHz, - It is understood that terrestrial amateur stations will access the transponder on 21.320 MHz +/- 7.5 kHz** | ||||
| Application Date: | 01 Oct 2024 | Freq coordination completed on | 15 Nov 2024 | |
The IARU Amateur Satellite Frequency Coordination Status pages are hosted
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