VEP

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VEP
Credit - ESA

Other Designations: Vehicle Evaluation Payload. Class: Technology. Destination: Geosynchronous Orbit. Nation: Japan. Agency: Japan(Myojo).

Monitored H-2 launch vehicle performance. National name MYOJO. Provided a ranging function as well as functions to measure the acceleration and deformation, in order to confirm the accuracy of the H-2 rocket orbit injection and understand the environment of the payload equipment. Launching organization NASDA.

Typical orbit: 449 km x 36261 km at 29 degrees inclination. Mass: 2,391 kg (5,271 lb). Associated Launch Vehicle: H-2, H-2A.

VEP Chronology

1994 February 3 - VEP - Launch Site: Tanegashima. Launch Vehicle: H-2. Mass: 2,391 kg (5,271 lb). Perigee: 449 km (278 mi). Apogee: 36,261 km (22,531 mi). Inclination: 28.60 deg. Period: 645.00 min.
Vehicle Evaluation Payload; monitored H-2 performance. Vehicle Evaluation Payload (VEP) MYOJO. Provides a ranging function as well as functions to measure the acceleration and deformation, in order to confirm the accuracy of the H-II rocket orbit injection and understand the environment of the payload equipme nt. Launch vehicle H-II rocket test flight H-II 1F. Launching organization NASDA. Launch time 2220:00 UT.

2001 August 29 - VEP-2 - Launch Site: Tanegashima. Launch Vehicle: H-2. Mass: 3,500 kg (7,700 lb). Perigee: 291 km (180 mi). Apogee: 35,979 km (22,356 mi). Inclination: 28.60 deg. Period: 636.60 min.
Vehicle Evaluation Payload-2 consisted of ballast and monitoring instrumentation that remained attached to the launch vehicle's second stage. It included a Doppler ranging experiment for orbit determination.

Bibliography:

McDowell, Jonathan, Jonathan's Space Home Page (launch records), Harvard University, 1997-present. Web Address when accessed: http://www.planet4589.org/jsr.html.
JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Web Address when accessed: http://msl.jpl.nasa.gov/home.html.
McDowell, Jonathan, Launch Log, October 1998. Web Address when accessed: http://hea-www.harvard.edu/~jcm/space/log/launch.html.
National Space Science Center Planetary Page, As of 19 February 1999.. Web Address when accessed: http://nssdc.gsfc.nasa.gov/planetary/planetary_home.html.
NASA/GSFC Orbital Information Group Website, Web Address when accessed: http://oig1.gsfc.nasa.gov/.
Space-Launcher.com, Orbital Report News Agency. Web Address when accessed: http://www.orbireport.com/Log.html.

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