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The VEP 3 (Vehicle Evaluation Payload 3) was a demonstration payload flown on the second flight of the H-2A launch vehicle.

It consisted of instruments to monitor the thermal and acoustic launch environment on the dual launch adaptor to understand the conditions satellites will encounter while riding H-2A rockets to space. It remained intentionally connected to the cone section of the dual launch system. VEP 3 carried acoustic sensors, accelerometers and temperature sensors.

VEP 3 was also to deploy the DASH reentry demonstrator, before it was separated from the launch vehicle, but this small satellite failed apparently to separate from VEP 3.

Nation: Japan
Type / Application: Technology
Operator: NASDA
Equipment: Acoustic sensors, accelerometers and temperature sensors
Configuration: truncated cone
Propulsion: None
Power: Batteries
Mass: 33 kg (without adaptor)
Orbit: GTO
Satellite COSPAR Date LS Launch Vehicle Remarks
VEP 3 2002-003C 04.02.2002 Ta YLP-1 H-2A-2024 with MDS 1, DASH
Further VEP missions:

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