1. INSIGHTS FROM CAR AIRBORNE MEASUREMENTS DURING INTEX-B (Mexico) FOR SATELLITE VALIDATION C. K. Gatebe, 1,2 Michael D. King, 2 G.T. Arnold, 1,3 O. Dubovik, 4 A. Lyapustin, 1,2 J. Redemann 5 & P. B. Russell 5 Acknowledgements: Hal Maring (NASA HQ) Ben Hovelman (Sky Research Inc.) Jeff Myers (NASA Ames) 1 University of Maryland, Baltimore County 2 NASA Goddard Space Flight Center 3 Science Systems and Applications Inc. 4 Laboratoire d’Optique Atmosphérique 5 NASA Ames Research Center

2. Outline: What did we measure? Why? What is the current state of data? Is there any significant result? Where is the work heading?

3. CAR Science Goals: Measure spectral directional reflectance over different types of surfaces in Mexico (e.g. urban, ocean, clouds, etc) Derive surface BRDF and column aerosol optical properties of different atmospheric layers from combined data sets: CAR, AATS & AERONET Compare with in situ measurements of aerosol optical properties and validate satellite retrievals

4. The J-31 Configuration for INTEX-B CARSSFR AATS RSP

5. Overview of the CAR Sensor Characteristics  14 spectral bands (0.34 to 2.29 µm)  scan ±95° from horizon on right-hand side of aircraft  field of view 17.5 mrad (1°)  scan rate 1.67 Hz (100 rpm)  data system 9 channels @ 16 bit  395 pixels in scan line Sensor Characteristics  14 spectral bands (0.34 to 2.29 µm)  scan ±95° from horizon on right-hand side of aircraft  field of view 17.5 mrad (1°)  scan rate 1.67 Hz (100 rpm)  data system 9 channels @ 16 bit  395 pixels in scan line Solar Spectral Irradiance

6. Primary Surface Targets in Mexico Mexico City Clouds Ocean Target of Opportunity

7. BRDFs from Airborne Measurements

10. Mexico City - Aerosols Size Distr. Retrieved aerosol volume size distribution from combined data sets: CAR, AERONET and AATS. Other aerosol parameters will be given in the poster: Gatebe et al. Higher Alt. (1.8 km agl)Lower Alt. (0.5 km agl)

11. Conclusion: Level-1B data have been processed with final calibration. (Format of our data is HDF- EOS). Level 2 products will be available soon in ICARTT format. (car.gsfc.nasa.gov/data --> select INTEX-B) We have obtained unique results especially for BRDFs over Mexico City, Gulf of Mexico (Ocean & Clouds) and aerosol optical properties from combined measurements. Focus will now be on publishing results from BRDFs measurements, inversion, etc. – and conduct validation studies.