Proposal for Infrared Atmospheric Sounding Interferometer on-board data compression

Joaquín García-Sobrino; Ian Blanes; Mathieu Albinet; Roberto Camarero; Joan Serra-Sagristà

doi:10.1117/1.JRS.9.097498

20 May 2015 Proposal for Infrared Atmospheric Sounding Interferometer on-board data compression

Joaquín García-Sobrino, Ian Blanes, Mathieu Albinet, Roberto Camarero, Joan Serra-Sagristà

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 9, Issue 1, 097498 (May 2015). https://doi.org/10.1117/1.JRS.9.097498

Abstract

The Infrared Atmospheric Sounding Interferometer (IASI) system provides infrared soundings of moisture and temperature profiles, as well as soundings of chemical components. These measurements play a key role in atmospheric chemistry, global change, and climate monitoring. The instrument, developed by a cooperating agreement between European Organisation for the Exploitation of Meteorological Satellites and Centre National d'Études Spatiales, is implemented on the Metop satellite series. The instrument data production rate is 45 Mb/s while the transmission rate allocated to IASI measurements is 1.5 Mb/s. It is thus necessary to implement a significant part of the IASI data processing on-board the instrument. We investigate the information statistics of IASI L0 data once the on-board processing chain is finished. We analyze order-0 entropy, and order-1, order-2 and order-3 conditional entropies, where conditional entropies assess both the spectral and the spatial joint information. According to the simple order-0 entropy, at least one bit per sample could be spared if a variable-length code was employed. We also investigate the actual performance of different lossless compression techniques on IASI L0 data. The CCSDS-123, JPEG-LS, and JPEG2000 standards, as well as M-CALIC coding technique are evaluated. Experimental results reveal that IASI Level 0 data can be coded by a compression ratio above 2.6:1.

Citation Download Citation

Joaquín García-Sobrino, Ian Blanes, Mathieu Albinet, Roberto Camarero, and Joan Serra-Sagristà "Proposal for Infrared Atmospheric Sounding Interferometer on-board data compression," Journal of Applied Remote Sensing 9(1), 097498 (20 May 2015). https://doi.org/10.1117/1.JRS.9.097498

Published: 20 May 2015

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