Monitoring and predicting rate of VIIRS sensitivity degradation from telescope contamination by tungsten oxide

Slawomir Blonski; Changyong Cao

doi:10.1117/12.2016008

21 May 2013 Monitoring and predicting rate of VIIRS sensitivity degradation from telescope contamination by tungsten oxide

Slawomir Blonski, Changyong Cao

Author Affiliations +

Proceedings Volume 8739, Sensors and Systems for Space Applications VI; 87390D (2013) https://doi.org/10.1117/12.2016008
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

Shortly after the Earth observations with the VIIRS instrument launched onboard the Suomi NPP spacecraft have begun, it was observed that responsivity of some of the instrument’s spectral bands decreases with time faster than expected. It was determined that the VIIRS telescope mirror contamination with tungsten oxide is the root cause of the degradation, and that the rate of the degradation is controlled by exposure of the mirrors to ultraviolet radiation. We have monitored progress of the degradation using measurements of light reflected from the onboard calibrator’s solar diffuser and taking into account seasonal changes of the solar illumination of the diffuser. The measurements were then used to develop an empirical model of the degradation dynamics and predict future rate of the responsivity changes during the seven-year lifetime of the Suomi NPP mission.

Citation Download Citation

Slawomir Blonski and Changyong Cao "Monitoring and predicting rate of VIIRS sensitivity degradation from telescope contamination by tungsten oxide", Proc. SPIE 8739, Sensors and Systems for Space Applications VI, 87390D (21 May 2013); https://doi.org/10.1117/12.2016008

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