Mirror emissivity measurements for the NASA AURA HIRDLS instrument

John J. Barnett; Karim Djotni; Christopher L. Hepplewhite; Olusoji O. Oduleye; Christopher W. P. Palmer; Daniel M. Peters; Trevor W. Walton; Robert E. J. Watkins; John G. Whitney; John C Gille; Philip I. Arter; Bruno Nardi

doi:10.1117/12.514591

10 November 2003 Mirror emissivity measurements for the NASA AURA HIRDLS instrument

John J. Barnett, Karim Djotni, Christopher L. Hepplewhite, Olusoji O. Oduleye, Christopher W. P. Palmer, Daniel M. Peters, Trevor W. Walton, Robert E. J. Watkins, John G. Whitney, John C Gille, Philip I. Arter, Bruno Nardi

Author Affiliations +

Proceedings Volume 5152, Infrared Spaceborne Remote Sensing XI; (2003) https://doi.org/10.1117/12.514591
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The High Resolution Dynamics Limb Sounder (HIRDLS) instrument is scheduled for launch on the NASA AURA satellite in January 2004; it is a joint project between the UK and USA. HIRDLS is a mid-infrared limb emission sounder which will measure the concentration of trace species and aerosol, and temperature and pressure variations in the Earth's atmosphere between about 8 and 100 km altitude on a finer spatial scale than been achieved before. HIRDLS has particularly stringent radiometric calibration accuracy requirements. A warm (280-300K) 'In-Flight Calibrator' (IFC) black cavity within the instrument plus a view to cold space are used to perform radiometric calibration. The cavity has an entrance aperture which is much smaller than the full beam size, and it is viewed through a focusing mirror. The cavity and focusing mirror are ideally maintained at the same temperature but differences of up to 1 C may exist, in which case a correction utilising the mirror emissivity can usefully be made. That emissivity has been measured at instrument level during pre-launch calibration by viewing an external target at the same temperature as the IFC while varying the calibration mirror temperature.

Citation Download Citation

John J. Barnett, Karim Djotni, Christopher L. Hepplewhite, Olusoji O. Oduleye, Christopher W. P. Palmer, Daniel M. Peters, Trevor W. Walton, Robert E. J. Watkins, John G. Whitney, John C Gille, Philip I. Arter, and Bruno Nardi "Mirror emissivity measurements for the NASA AURA HIRDLS instrument", Proc. SPIE 5152, Infrared Spaceborne Remote Sensing XI, (10 November 2003); https://doi.org/10.1117/12.514591

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available