Evaluation of the Visible Infrared Imaging Radiometer Suite (VIIRS) Cloud Base Height (CBH) Pixel level Retrieval Algorithm for Single layer Water Clouds
Technical Report,01 May 2014,24 Mar 2016
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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Evaluation of the Visible Infrared Imaging Radiometer Suite VIIRS Cloud Base Height CBH product was accomplished. CBH is an important factor for aviation, but a lack of coverage for ground-based retrieval is a significant limitation. Space-based retrieval is essential therefore, the VIIRS CBH pixel-level retrieval algorithm was assessed for single-layer water clouds. Accurate truth measurements were needed not only for the CBH product, but also for VIIRS cloud optical thickness COT, effective particle size EPS, and cloud top height CTH. Data from Atmospheric Radiation Measurement ARM sites were used, with VIIRS-ARM matchups created from June 2013 through October 2015 for four locations. After initial CBH results were large and highly variable, the VIIRS CTH product was replaced with the ARM truth CTH product. This substantially reduced variability and errors in the VIIRS CBH products, demonstrating that the CBH algorithm is fundamentally sound. Thus, future research is needed to reduce errors in the VIIRS CTH products in order to ensure the CBH products are suitable for aviation support.
- Atmospheric Physics
- Optical Detection and Detectors