Purpose of the flight and payload description

The purpose of the flight was to observe the vertical distribution of nitrogen dioxide and ozone density in the troposphere and stratosphere.

Details of the balloon flight

Balloon launched on: 9/12/2002
Launch site: Sanriku Balloon Center, Iwate, Japan  
Balloon launched by: Institute of Space and Astronautical Science (ISAS)
Balloon manufacturer/size/composition: Zero Pressure Balloon model BT5 5.000 m3
Flight identification number: BT5-21
End of flight (L for landing time, W for last contact, otherwise termination time): 9/12/2002
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 4 h 50 m

During the flight were obtained succesfully the ultraviolet spectrum of the sun. Observations started right after the balloon entered level flight and were carried out by orienting the direction of the gondola to the sun and tracking the sun by making adjustments to downward and upward angles of observation instruments until the sunset up in the sky.

External references

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