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William H. Hunt, David M. Winker, Mark A. Vaughan, Kathleen A. Powell, Patricia L. Lucker, and Carl Weimer

Satellite ( ICESAT ) ( Spinhirne et al. 2005 ). CALIOP has already provided far more high-quality global atmospheric data than the two earlier missions, and it continues to add to that dataset. 2. CALIOP description a. Transmitter subsystem The lidar consists of a transmitter subsystem that sends a laser pulse down through the atmosphere, a receiver subsystem that collects and measures the light that is backscattered from the laser pulse, a payload computer that controls the subsystems and does some

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David M. Winker, Mark A. Vaughan, Ali Omar, Yongxiang Hu, Kathleen A. Powell, Zhaoyan Liu, William H. Hunt, and Stuart A. Young

, cloud ice–water phase, and profile products for the first time. CALIOP level 1b data consist of geolocated profiles of calibrated lidar return signals (normalized attenuated backscatter) along with information on surface type, calibration and quality assurance, and a limited set of instrument status data. Three types of profiles are provided in the level 1B product: total backscatter (parallel plus perpendicular) at 532 and 1064 nm and the 532-nm perpendicular backscatter. The geolocation and

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Stuart A. Young and Mark A. Vaughan

lidar ratio for cirrus. d. The HERA profile solver To permit the tuning of various analysis parameters based on the experience gained from processing actual atmospheric data, and to permit the adjustment of these parameters in order to compensate for the expected reduction in performance (basically in SNR) over time or for significant changes in the atmosphere that would occur following the injection into the stratosphere of material from a major volcanic eruption, many parameters used to control

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Ali H. Omar, David M. Winker, Mark A. Vaughan, Yongxiang Hu, Charles R. Trepte, Richard A. Ferrare, Kam-Pui Lee, Chris A. Hostetler, Chieko Kittaka, Raymond R. Rogers, Ralph E. Kuehn, and Zhaoyan Liu

solution for the month of August 2006. The few cases where the lidar ratio adjustment is to increase the lidar ratio [extinction quality-control (QC) value of 4 in the version 2 data products] are not shown in Fig. 8 . In Fig. 8 , most of the cases where a lidar ratio change is warranted occur for very thick aerosol layers with optical depths greater than one. Table 2 shows the statistics of the change in lidar ratio values for the 5-km layers (i.e., layers found at a 5-km resolution) for the same

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