WHIPS2 (the Wisconsin Horizontal Interpolation Program for Satellites)

Average tropospheric vertical column density for July 2005 as measured by OMI and retrieved by KNMI.  WHIPS was used to interpolate the data to these grids.

WHIPS (the Wisconsin Horizontal Interpolation Program for Satellites) is an open-source program designed to make satellite-derived air quality data more usable.  WHIPS interpolates level 2 satellite retrievals onto a user-defined fixed grid, in effect creating custom-gridded level 3 satellite product.  You might be interested in WHIPS if you…

• Run an air quality model and want to validate it against satellite measurements.
• Plan to compare satellite data to ground-based measurements.
• Need to compare multiple satellites on a common grid.
• Want to boost the horizontal resolution of your satellite data by averaging over time.

Output is flexible in resolution and projection, and can accommodate both equirectangular and lambert conic conformal projections. Currently, WHIPS can process the following data products:
• OMI NO2 (NASA retrieval)
• OMI NO2 (KNMI retrieval)
• OMI HCHO (NASA retrieval)
• MOPITT CO (NASA retrieval)
• MODIS AOD (NASA retrieval)

Established NASA methodology is used to interpolate and average input data.  Output is provided in the netCDF format.  As a command-line tool usable in either Linux or Unix environments, it can be easily run from a script for high data throughput.

WHIPS is available free of charge and open source.  If you publish research or present results generated with WHIPS, please include the following acknowledgement or an appropriate equivalent:

We wish to thank the University of Wisconsin--Madison for the use and development of the Wisconsin Horizontal Interpolation Program for Satellites (WHIPS). WHIPS was developed by Jacob Oberman, Erica Scotty, Keith Maki, Tracey Holloway and Xiaomeng Jin, with funding from the NASA Air Quality Applied Science Team (AQAST) and the Wisconsin Space Grant Consortium Undergraduate Award.

WHIPS User's Guide v2
WHIPS User's Guide v1.2

Updated: 1/27/15

SAGE is a Research Center of the Nelson Institute for Environmental Studies at the University of Wisconsin-Madison

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