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The VEP 4 (Vehicle Evaluation Payload 4) is a demonstration payload to be flown on the second flight of the H-3-22S launch vehicle.

VEP 4 consists of a non-seperable dummy mass attached to stage 2 of the launch vehicle. It will also deploy the small CE-SAT 1E and TIRSAT satellites.

The mass and centre of mass of VEP 4 is the same as ALOS 3. Technically VEP 4 will be seperated to test the separation system, but will stay connected via stopper bolts to avoid producing space debris.

Nation: Japan
Type / Application: Technology
Operator: JAXA
Equipment: Acoustic sensors, accelerometers and temperature sensors
Configuration: truncated cone
Propulsion: None
Power: Batteries
Orbit: GTO
Satellite COSPAR Date LS Launch Vehicle Remarks
VEP 4 2024-032# 17.02.2024 Ta YLP-2 H-3-22S with CE-SAT 1E, TIRSAT
Further VEP missions:

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