Sounder PEATE Data Products
The Sounder PEATE, or SNPP Sounder PEATE, is one of six PEATEs formed by NASA to support NASA Science Teams
studying instrument data from the Soumi NPP (previously known as NPP) satellite. The Simultaneous Nadir Observation
(SNO) products enable comparisons of simultaneously observed data from similar instruments deployed on different
satellites is a useful technique for assessing instruments calibration. SNO products contain
simultaneous nadir radiance observations for the set of similar temperature-profiling
instruments deployed on “AM satellites” ( MetOp-A, MetOp-B) and “PM satellites“ (Aqua,
SNPP, NOAA-18 and NOAA-19). The CalSub product files are constructed from calibrated radiance files
(infrared and microwave) from either the SNPP, Aqua or MetOP-A/B. Nominally one logical file is constructed for a 24-hour period, from midnight to midnight of the following day. This file is split into a set of four physical files to support specific concept studies and to further minimize the need to handle extraneous data. The four files are Clear fields of view, Fixed calibration sites (ARMS sites), Clouds and extreme conditions, and Randomly selected spectra within 3-degrees of nadir. The Level 3 (L3) Product provides global cylindrical grids summarizing Level-2 (L2) data from a given instrument suite for one day, 8-consecutive days, or one month. Data on such a grid is easier to visualize and to compare to data from other instruments and from forecasts and climate models. The PEATE Level 3 products contain retrieved L2 surface pressure, total water and ozone columns, and vertical profiles of temperature and water vapor averaged over a uniform set of latitude, longitude grid cells accumulated over daily, 8-day or monthly time scales. Separate Level 3 files are prepared based on the output of the microwave-only retrieval (MW), and the combined microwave and infrared retrieval (IRMW). The IRMW file includes the infrared-retrieved ozone column.
Sounder PEATE Simultaneous Nadir Observation (SNO) Products (Version 10)
 A range is given because the average size of each file in the pair can vary.
Sounder PEATE Calibrated Radiance Subset (CalSub) Products (Version 10)
Sounder PEATE Level 3 (L3) Products (Version 10)