Harold S Stewart

Title: Harold S. Stewart: Innovator in Atmospheric Measurement Technology

Introduction

Harold S. Stewart is a notable inventor based in North Andover, MA (US). He has made significant contributions to the field of atmospheric measurement technology. His innovative work has led to the development of a unique instrument designed to measure the extinction coefficient of atmospheric aerosols.

Latest Patents

Harold S. Stewart holds a patent for the Atmospheric Aerosol Extinctiometer. This instrument measures the extinction coefficient of atmospheric aerosol by directing a single light beam from a graybody source through two similar optical paths to a detector. Each optical path traverses an equal length region of ambient air, with aerosols filtered from one of the paths. The detector measures the modulation of the incident radiation, and its output is a function of the extinction coefficient of the ambient air under test. A second detector monitors the beam power, while processing electronics compute the extinction coefficient based on the detector outputs. The design includes alternately filtered ambient air regions for improved performance.

Career Highlights

Harold S. Stewart has dedicated his career to advancing atmospheric science. He works for the United States of America as represented by the Secretary of the Air Force. His expertise in atmospheric measurement has positioned him as a key figure in this specialized field.

Collaborations

Throughout his career, Harold has collaborated with notable colleagues, including Donald F. Hansen and Vernon D. Turner. These partnerships have contributed to the advancement of technology in atmospheric measurement.

Conclusion

Harold S. Stewart's innovative contributions to atmospheric measurement technology, particularly through his patent for the Atmospheric Aerosol Extinctiometer, highlight his significant role in the field. His work continues to influence the understanding of atmospheric aerosols and their impact on the environment.