Analysis of nodding system requirements for satellite radiometry

David A. Nahrstedt; Timothy J. Brinkley

doi:10.1117/12.203102

1 June 1995 Analysis of nodding system requirements for satellite radiometry

David A. Nahrstedt, Timothy J. Brinkley

Author Affiliations +

Optical Engineering, Vol. 34, Issue 6, (June 1995). https://doi.org/10.1117/12.203102

Abstract

Estimates are made of nodding requirements for a secondary mirror used for radiometry of satellites in the 8- to 12-μm band. The first portion of the analysis determines the fundamental nodding frequency based on atmospheric turbulence and wind measurements taken at the Air Force Maui Optical Station. The temporal power spectral density for sky background fluctuations shows that a 50-Hz frequency will satisfy 50-percentile wind and turbulence conditions. The required frequency for a maximum operating wind condition of 40 mph is above 100 Hz. In addition to the 50-Hz fundamental, the analysis indicates that at least one, and preferably two, higher order harmonics of 150 and 250 Hz, respectively, are required to reconstruct a mirror drive waveform with sufficient duty cycle or integration time for background subtraction. The results are shown to be consistent with the performance of existing nodding systems.

Citation Download Citation

David A. Nahrstedt and Timothy J. Brinkley "Analysis of nodding system requirements for satellite radiometry," Optical Engineering 34(6), (1 June 1995). https://doi.org/10.1117/12.203102

Published: 1 June 1995

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