 Special readings were taken with the Measurement of Air Pollution by Satellite instrument as intentionally set fires were monitored by scientists from the University of Iowa and the Canadian Forest Service.The wind field and thermal evolution of the fires will be analyzed to provide a better interpretation of carbon monoxide emissions from the burning forest and to help calibrate color infrared photography taken by the STS-68 crew.These fires were planned in advance of the mission, and would have been set for forest management purposes even if the shuttle mission were not in progress.