Polar Pathfinder Sampler: Combined AVHRR, SMMR-SSM/I, and TOVS Time Series and Full-Resolution Samples


Summary

The AVHRR, SMMR-SSM/I and TOVS Polar Pathfinder research teams collaborated to make it as easy as possible to use Polar Pathfinder data sets together by employing a common projection, namely the NSIDC Equal-Area Scalable Earth-Grid (EASE-Grid), and validation methods to develop consistently processed data sets that are easy to combine, compare and contrast. This CD-ROM includes sample data, time-series visualizations, and browse products, for temporal and spatial subsets of the AVHRR, SMMR-SSM/I and TOVS data sets, to illustrate the types of products available for the various data sets. Also included in this CD-ROM is the P-Cube, is a multidimensional structure combining arctic SSM/I, AVHRR and TOVS data.

AVHRR products for both hemispheres, at 1.25 and 5 km resolutions, include calibrated channel data, surface broadband albedo, surface temperature, and ancillary data so that users can apply algorithms of their choice to calculate albedo and surface temperature. To conserve space, the CD-ROM includes 1.25 km AVHRR time-series visualizations, rather than raw data; and 5 km AVHRR sample data, movies and browse images. SSM/I brightness temperature data and time files for one day in 1997 are included, in each of three projections: Northern and Southern Hemispheres and a global projection. TOVS parameters derived from arctic radiances include atmospheric temperature profiles, water vapor, surface temperature, total effective cloud fraction, cloud top pressure and temperature, turning angle between geostrophic wind and surface stress over ice, emissivity, boundary layer stratification and geostrophic drag coefficient. The CD-ROM includes sample TOVS products for four selected dates in 1988.

The P-Cube is a multidimensional structure combining arctic SSM/I, AVHRR and TOVS data, all mapped to a 100 km resolution EASE-Grid, thereby facilitating study of polar processes and interactions among them using data from multiple sensors. The current prototype version of the P-Cube includes the most important parameters from the three Polar Pathfinders noted above. The Polar Pathfinder Sampler CD-ROM is currently the only source of the P-Cube data; temporal coverage extends from 1 January 1988 to 31 December 1989.

All data at the original resolution are now available. See NOAA/NASA Polar Pathfinder Data or contact User Services for more information.

Citing These Data

National Snow and Ice Data Center, compiler. 1999. Polar Pathfinder sampler: AVHRR, SMMR-SSM/I, and TOVS samples and combined time series. Boulder, CO: National Snow and Ice Data Center. CD-ROM.

To broaden awareness of our services, NSIDC requests that you acknowledge the use of data sets distributed by NSIDC. Please refer to the citation below for the suggested form, or contact NSIDC User Services for further information. We also request that you send us one reprint of any publication that cites the use of data received from our Center. This helps us to determine the level of use of the data we distribute. Thank you.

See Also:

References

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Document Information

Document Revision Date: 10 May 2005
Document Review Date: 17 May 1999

Document Curator: NSIDC Writers
Document URL: http://nsidc.org/data/docs/daac/nsidc0069_pathfinder_sampler.gd.html