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XW 4 (CAS 10)

The XW 4 or CAS 10 (Chinese Amateur Radio satellite 10), also known as Hope-4, is an 8U CubeSat that will carry an Amateur Radio VHF to UHF linear transponder for SSB communications.

It is a follow on mission from CAS-9 and is an 8U CubeSat, approx 228 × 455 × 100 mm, with a mass of 12 kg.

The satellite will carry:

  • A VHF uplink and UHF downlink linear transponder with a bandwidth of 30kHz. This transponder will work all day during the life cycle of the satellite, and amateur radio enthusiasts around the globe can use it for two-way radio relay communications.
  • A camera, and the pictures it takes are stored in the flash memory on the satellite, we have designed a simple remote control system based on DTMF, and amateur radio enthusiasts around the globe can send DTMF commands to download the camera photos.
  • A CW beacon to send satellite telemetry data, which is also a feature that is widely welcomed by amateur radio enthusiasts.
  • A AX.25 4.8k/9.6kbps GMSK telemetry downlink

Planning a launch in November 2022 from Hainan Launch Center onboard of Tianzhou 5 using a CZ-7 launch vehicle into a 400 km circular 42.9 inclination orbit. It will later be deployed from the CSS.

Nation: China
Type / Application: Amateur radio communication, technology
Operator: CAMSAT
Contractors: CAMSAT
Equipment:
Configuration: CubeSat (8U, 2×4U)
Propulsion: None
Power: Solar cells, batteries
Lifetime:
Mass:
Orbit:
Satellite COSPAR Date LS Launch Vehicle Remarks
XW 4 (CAS 10) - 2022 We LC-201 CZ-7 with Tianzhou 5

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