The New (Version 4) Calibration of the Nighttime 532nm Channel of the CALIPSO Lidar

Kar, J ; Vaughan, M A ; Lee, K P ; Tackett, J ; Avery, M ; Garnier, A ; Getzewich, B ; Hunt, W ; Josset, D ; Liu, Z (NASA Langley Research Center, Hampton, VA, United States)

关键词: AEROSOLS;    AIRBORNE EQUIPMENT;    ALGORITHMS;    BACKSCATTERING;    CALIBRATING;    CALIPSO (PATHFINDER SATELLITE);    DATA PRODUCTS;    OPTICAL RADAR;    STRATOSPHERE;    SATELLITE INSTRUMENTS;    SATELLITE OBSERVATION;    SIGNAL TO NOISE RATIOS;   

RP-ID  :  NF1676L-27552

学科分类：地球科学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The data products from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) on board Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) were recently updated following the implementation of a new (version 4.1) calibration algorithm for all the level 1 products. We present the motivation for and the implementation of the version 4.1 nighttime 532 nm parallel channel measurements. This is the most fundamental calibration of CALIOP data since all other measurements, i.e the 532 nm nighttime perpendicular, daytime 532 nm as well as 1064 nm are tied to this calibration. The new calibration is shown to resolve the discrepancies in the earlier version and also leads to an improved representation of the stratospheric aerosols. Initial validation results using ground based and airborne lidar measurements are also presented.