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CALIPSO - Data User’s Guide - IIR Level 1 Data Quality Statements


CALIPSO HOMECALIPSO User’s Guide HOME → IIR Level 1 Data Quality Statements

Version 2.01 (v2.01):
Data Release Date: October 01, 2020
Version: 2.01
Data Date Range: October 01, 2020 to present

A minor version bump (+0.01) has been applied to all CALIPSO data products due to a required upgrade to the operating system on the CALIPSO production cluster. All algorithms were re-compiled to process in this new environment with no change to the underlying science algorithms or inputs.

Version 2.00 (v2.00):
Data Release Date: July 12, 2017
Version: 2.00
Data Date Range: June 13, 2006 to September 30, 2020

The second version of the IIR Level 1 product is the first major revision to the Level 1 product since the first release in 2006. The calibration procedure has been adjusted to reduce known small seasonal calibration biases in the Northern Hemisphere, which were caused by thermal drifts synchronized with the elapsed time since the night-to-day transition.




Version 1 (v1.13):
Data Release Date: October 01, 2020
Version: 1.13
Data Date Range: October 01, 2020 to present

A minor version bump (+0.01) has been applied to all CALIPSO data products due to a required upgrade to the operating system on the CALIPSO production cluster. All algorithms were re-compiled to process in this new environment with no change to the underlying science algorithms or inputs.


Version 1 (v1.10, v1.11, and v1.12):
Data Release Date: December 2011
Version: 1.12
Data Date Range: November 01, 2011 to September 30, 2020

The CALIPSO Team is releasing Version 1.12 which represents a transition of the Lidar, IIR, and WFC processing and browse code to a new cluster computing system. No algorithm changes were introduced and very minor changes were observed between V 1.11 and V 1.12 as a result of the compiler and computer architecture differences. Version 1.12 is being released in a forward processing mode beginning November 1, 2011.


Version 1 (v1.10, v1.11, and v1.12):
Data Release Date: November 06, 2008
Version: 1.11
Data Date Range: August 20, 2008 to October 31, 2011

Minor changes were applied to the algorithm, with no impact regarding the calibrated radiances.


Version 1 (v1.10, v1.11, and v1.12):
Data Release Date: December 08, 2006
Version: 1.10
Data Date Range: June 13, 2006 to August 19, 2008

In-flight performances were assessed by CNES at the beginning of the mission. The in-flight short-term gain stability was found to be better than 0.1 K of equivalent brightness temperature, except during the day-to-night transitions, during which the gain varies by up to 0.45 K. The in-flight noise equivalent differential temperature (NedT) at 210 K was between 0.2 and 0.3 K, similar to values measured before launch and better than the specified value of 0.5 K.




NASA
Last Updated: November 22, 2021
Curator: Charles R. Trepte
NASA Official: Charles R. Trepte

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