Analysis of S-NPP VIIRS RSB bands detector saturation status and its change with time

Chengbo Sun; Xuexia Chen; Ning Lei; Kwofu Chiang; Xiaoxiong Xiong

doi:10.1117/12.2321341

7 September 2018 Analysis of S-NPP VIIRS RSB bands detector saturation status and its change with time

Chengbo Sun, Xuexia Chen, Ning Lei, Kwofu Chiang, Xiaoxiong Xiong

Proceedings Volume 10764, Earth Observing Systems XXIII; 107641F (2018) https://doi.org/10.1117/12.2321341
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

The Visible Infrared Imaging Radiometer Suite (VIIRS) on the S-NPP satellite has been in successful operation for more than six years. One of the key performance parameters of the instrument detectors is the saturation of their digital counts (DN). For VIIRS, when the scene spectral radiance level is high enough, before reaching the digital maximum that can be accommodated by the number of bits, the DN for the detector stops increasing and often decreases with increasing scene radiance. Consequently, for some high scene radiances, the pixel spectral radiance calculated from the DN does not accurately reflect the true radiance. To inform the data product user that the calculated pixel radiance may not be accurate, a quality flag is used to indicate that the pixel may be inaccurate. In the current S-NPP VIIRS L1B product, the DN saturation flag is turned on once the DN exceeds a fixed threshold level. In this study, the VIIRS Reflective Solar Band (RSB) detectors’ true threshold levels are characterized by studying their responses to high radiance scenes. The long-term trending of these true threshold levels for each detector is analyzed to examine whether the threshold levels are time dependent. Some saturation effects that may be amenable to correction are also investigated, resulting in more useful data. The results from this study will improve data quality with more accurate DN saturation flags.

Citation Download Citation

Chengbo Sun, Xuexia Chen, Ning Lei, Kwofu Chiang, and Xiaoxiong Xiong "Analysis of S-NPP VIIRS RSB bands detector saturation status and its change with time", Proc. SPIE 10764, Earth Observing Systems XXIII, 107641F (7 September 2018); https://doi.org/10.1117/12.2321341

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Reflectivity

Clouds

Infrared imaging

Radiometry

Sun

Visible radiation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years