U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Area Measurements of Apertures for Exo-Atmospheric Solar Irradiance for JPL

Published

Author(s)

Maritoni A. Litorja, Bettye C. Johnson, J B. Fowler

Abstract

A comparison of the area measurements of the limiting apertures used for total solar irradiance measurements in the Active Cavity Radiometer Irradiance Monitor II (ACRIM II) and Active Cavity Radiometer Irradiance Monitor III (ACRIM III) were conducted between the National Institute of Standards and Technology (NIST) and the Jet Propulsion Laboratory (JPL). The ACRIM apertures, due to their unique size and design, necessitated modifications to the NIST aperture measurement system. The changes and the validation procedures undertaken are described in this paper. This is part of an Earth Observing System (EOS)-sponsored international comparison of aperture area measurements of apertures that have institutional heritage with historical solar irradiance measurements.
Proceedings Title
SPIE Conference on Optical Engineering and Applications | 2007 |
Conference Dates
August 26-30, 2007
Conference Title
SPIE
Pub Type
Conferences

Keywords

aperture area, geometric aperture area, radiometry, total solar irradiance

Citation

Litorja, M. , Johnson, B. and Fowler, J. (2007), Area Measurements of Apertures for Exo-Atmospheric Solar Irradiance for JPL, SPIE Conference on Optical Engineering and Applications | 2007 | (Accessed May 1, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created September 13, 2007, Updated February 17, 2017