Acknowledgements

The CAGEX effort would not be possible without the help of several colleagues:

NASA Langley & Analytical Services and Materials:

• Fred Rose, for his insightful observations, answers to countless questions, work on the Fu-Liou code, pre-release testing, bug-finding, and much more;
• Bill Smith Jr. - for providing the GOES-7/LBTM based clouds and core soundings for V1, GOES-8/LBTM clouds (V2), and for his guidance on the understanding of the cloud data sets;
• Don Garber for his part in making the cloud dataset available in the format I wanted;
• Pat Minnis for his cooperation with Tom and myself in putting together the cloud product;
• David Rutan, for his help in providing a spectral reflectance algorithm and MODTRAN-3 calculations;
• Roberta DiPasquale for early V2 work on SIROS radiometry and initial clear-sky testing;
• Greg Schuster for answering questions about the LSRN radiometry;
• Christina Moats for her assistance in providing the LSRN dataset;
• Charlie Whitlock for suggestions and guidance helpful to the effort;
• Shashi Gupta for checking early CAGEX results with his own radiative transfer calculations;
• Stuart LeCroy for running CAGEX through several different SW codes, part of our validation effort;
• Anne Wilber for 1) supplying us with SAGE upper-level humidities used in all our sounding datasets, and 2) working up the spectral surface emissivities used in the Fu-Liou code;
• Dave Kratz for guiding Fred Rose in fitting Tony Clough's CKD parameterization of the LW H2O continuum to the Fu-Liou code.;
• Martial Haefflin for an in-depth look at pre-release V2.0.0, allowing us to find inconsistencies and bugs;
• Marc Wilson, Ken Rutledge, and Kevin Larman for the insights into and access of the CARE (CERES/ARM Radiation Experiment) August 1998 (V3) radiometry data set.

Everywhere Else:

• Qiang Fu and Kuo-Nan Liou for supplying us with the Fu-Liou radiative transfer code, and modifying it to include the effect of aerosols and the extraction of direct and diffuse SW;
• John DeLuisi and Trevor Ley for providing us with BSRN and 25 meter tower radiometric data from the ARM site;
• Joe Michalsky (SUNY-Albany), a source of data and advice on the aerosol optical depths and their retrievals for both V1 and V2;
• Jim Spinhirne (NASA Goddard), for supplying us with lidar measurements of cloud base height, and a vertical distribution for use with aerosols for both V1 and V2;
• Peter Minnett, for coordinating the oftentimes confusing link between CAGEX and ARM;
• Shi-Keng Yang and Ron Nagatani (NCEP), for supplying me with the TOVS upper-level temperatures and humidities as well as the SBUV2 ozone for both V1 and V2, and for several conversations regarding the dataset;
• Francisco P.J. Valero (Atmospheric Research Laboratory at Scripps Institute of Oceanography, University of California at San Diego) for supplying us with the RAMS radiometry (V2).
• Brett Bush (Atmospheric Research Laboratory at Scripps Institute of Oceanography, University of California at San Diego), for answering many questions regarding the RAMS radiometry;
• Wayne Feltz (CMISS University of Wisconsin, Madison), for supplying the AERI lower-level water vapor retrievals (V2) and AERI/GOES Atmospheric profiles (V3);
• Eugene Clothiaux, (Pennsylvania State University) for supplying us with their 94 GHz cloud radar tops and bases (V2);
• Evgeny Yarosh, for his guidance and work involved with supplying us with the Eta sounding product (V2);
• Tom Ackerman, for pointing out the correct way to extract direct and diffuse SW from the Fu-Liou delta-four-stream code.
• Ellsworth Dutton (NOAA/CMDL), for answering many radiometry questions, and useful dialog regarding surface insolation.
• Warren Wiscombe, for his helpful comments on the web site;
• Jean-Jacques Morcrette (ECMWF), Henry Leighton (McGill University) and Rolf Stuhlmann (GKSS, Germany), for checking early CAGEX results with their radiative transfer calculations;
• Mike Rubes, who, along with John DeLuisi, supplied us with information on the uncertainty of the SIROS and BSRN pyrheliometers;
• Andy Lacis (NASA Goddard) and Ina Tegen (Columbia University) , for supplying us with mineral dust aerosol scattering properties;
• Dennis Hlavka (NASA Goddard/SSAI), along with Jim Spinhirne again, for providing lidar-based aerosol optical depths from which our V2 profiles were constructed;
• Alexander Trishchenko (EMS, Canada Center for Remote Sensing) for finding a bug in the satellite viewing zenith and relative azimuth angles;
• Chris Rocken and Teresa Van Hove (UNAVCO/UCAR) for supplying us with V2 GPS precipitable water at the ARM SGP CART central facility;
• David Starr (EOS Validation Scientist) and Tim Suttles (Hughes STX) (UNAVCO/UCAR) at NASA Goddard for advice on coordinating CAGEX with EOS.
• Connor Flynn for advice on the ARM ceilometer data set (V2).
• Tony Clough (AER Inc.) for providing us with the CKD 2.1 continuum for the absorption of water vapor in the longwave.
• Al Arking (Johns Hopkins University) for helping us create a better solar zenith angle data set as well as his aerosol optical depth insights for V2.2. Al has gone over the V2.1 data set with a fine-toothed comb, and has significantly bettered the V2.2 data set.
• Dave Turner (Pacific National Laboratory) for his expertise and guidance with the microwave radiometer product (V2.2).

We are operating under an umbrella of support from CERES PIs Bruce Barkstrom and Bruce Wielicki; Bob Curran and Bob Schiffer at NASA Headquarters; Gerry Stokes, Peter Minnett and Dave Randall for ARM; and Paul Try and Rick Lawford for GCIP. Thanks also to John Leese (GCIP) and John Vitko (ARM/UAV) for their continued support of CAGEX.

ARM data were obtained from the Atmospheric Radiation Measurement (ARM) Program sponsored by the U.S. Department of Energy, Office of Energy Research, Office of Health and Environmental Research, Environmental Sciences Division.

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