Airborne Southern Hemisphere Ozone Experiment

Project Description
In March through November 1994, the NASA ER-2 flew out of Barbers
Point, Hawaii, and Christchurch, New Zealand. These flights
constituted the ASHOE/MAESA mission.

The ASHOE part of the mission was intended to examine the causes of
ozone loss in the Southern Hemisphere lower stratosphere and to
investigate how the loss is related to polar, mid-latitude, and
tropical processes

For more information, link to
http://code916.gsfc.nasa.gov/Public/Analysis/aircraft/ashoe/ashoe.html