NSIDC-0071 Nimbus-7 SMMR Pathfinder Daily EASE-Grid Brightness Temperatures K. W. Knowles, Eni Njoku, R. L. Armstrong, and M. J. Brodzik Nimbus-7 SMMR Pathfinder Daily EASE-Grid Brightness Temperatures 2000-01-01 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/nsidc-0071.html Technical Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 x 1 303 492-2468 x

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA Investigator Kenneth Knowles

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA Investigator Mary J. Brodzik brodzik@nsidc.org

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 Investigator Richard Armstrong rlax@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES 449 UCB

University of Colorado

Boulder Colorado 80309-0449 USA Investigator Eni G. Njoku njoku@lor.jpl.nasa.gov 1 818 354-3693

California Institute of Technology

Jet Propulsion Laboratory

M/S 300-233

Jet Propulsion Laboratory

California Institute of Technology

4800 Oak Grove Drive

Pasadena CA 91109-8099 USA EARTH SCIENCE Spectral/Engineering Microwave Brightness Temperature EARTH SCIENCE Spectral/Engineering Microwave Brightness Temperature Climatology/Meteorology/Atmosphere Antarctic Arctic BRIGHTNESS TEMPERATURES Ease EASE-Grid EOSDIS Global Gridded Data NIMBUS-7 Northern Hemisphere Passive Microwave Pathfinder Polar RADIOMETER Scanning Multichannel Microwave Radiometer SMMR Southern Hemisphere SMMR Scanning Multichannel Microwave Radiometer NIMBUS-7 1978-10-25 1987-08-20 complete -90 90 -180 180 GEOGRAPHIC REGION GLOBAL GEOGRAPHIC REGION NORTHERN HEMISPHERE GEOGRAPHIC REGION SOUTHERN HEMISPHERE 25 km 25 km 25 km 25 km 1 day EOSDIS Earth Observing System Data Information System ESIP Earth Science Information Partners Program NOAA/NASA PATHFINDER NOAA/NASA Pathfinder Program Quality indicator flags were provided in the level 1b data for the scan status word of each scan. These flags indicated conditions in the original data or in the data processing that may have given rise to reduced-quality calibrated output. None of these data were eliminated from the gridded product English NSIDC NSIDC_DAAC NASA DAAC at the National Snow and Ice Data Center http://nsidc.org/daac/index.html Data Center Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA NSIDC National Snow and Ice Data Center http://nsidc.org Data Center Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA CD-ROM 83 MB Binary FTP 83 MB Binary Brodzik, M. J. 1998. The EASE-Grid, A Versatile Set of Equal-Area Projections and Grids. Special report to the National Snow and Ice Data Center, Boulder, CO. Frances, E. A. 1987. Calibration of the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) 1979-1984. Master's Thesis, College of Oceanography, Oregon State University, Corvallis, OR. Fu, C. C., D. Han, S. T. Kim, and P. Gloersen. 1988. User's Guide for the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) CELL-ALL tape. NASA Reference Publication #1210, National Aeronautics and Space Administration, Washington, D.C. Gloersen, P., W. J. Campbell, D. J. Cavalieri, J. C. Comiso, C. L. Parkinson, and H. J. Zwally. 1992. Arctic and Antarctic Sea Ice, 1978-1987: Satellite Passive Microwave Observations and Analysis. NASA Special Publication SP-511. National Aeronautics and Space Administration. Washington, D.C. Gloersen, P. 1987. In-orbit Calibration Adjustment of the Nimbus-7 SMMR. NASA Technical Memorandum #100678, National Aeronautics and Space Administration. Washington, D.C. Gloersen, P., D. J. Cavalieri, A. T. C. Chang, T. T. Wilheit, W. J. Campbell, O. M. Johannessen, K. B. Katsaros, K. F. Kunzi, D. B. Ross, D. Staelin, E. P. L. Windsor, F. T. Barath, P. Gudmansen, E. Langham, and R. Ramseier. 1984. A Summary of Results from the First Nimbus-G SMMR Observations. Journal of Geophysical Research 89:5335-44. Gloersen, P. and F. T. Barath. 1977. A Scanning Multichannel Microwave Radiometer for Nimbus-7 and Seasat-A. IEEE Journal of Oceanic Engineering OE-2:172-178. Hofer, R. and E. G. Njoku. 1981. Regression Techniques for Oceanographic Parameter Retrievals Using Spaceborne Microwave Radiometry. IEEE Transactions on Geoscience and Remote Sensing GE-19:178-89. Knowles, Kenneth W. 1993. Points, Pixels, Grids, and Cells: A Mapping and Gridding Primer. Special report to the National Snow and Ice Data Center, Boulder, CO. Liu, W. T. and D. R. Mock. 1986. Evaluation of Geophysical Parameters Measured by the Nimbus-7 Microwave Radiometer for the TOGA Heat Exchange Project. JPL Publication 86-50, Jet Propulsion Laboratory, Pasadena, CA. Madrid, C. R. (Ed.). 1978. The Nimbus 7 User's Guide. Landsat/Nimbus Project, Goddard Space Flight Center, Greenbelt, MD. McMillan, D. S. and D. Han. 1990. Long-term Trends and Instrument Warm-up Effects in Nimbus-7 Scanning Multichannel Microwave Radiometer Radiances. (Unpublished Document), NASA Goddard Space Flight Center, Greenbelt, MD. Milman, A. S. and T. T. Wilheit. 1985. Sea Surface Temperatures from the Scanning Multichannel Microwave Radiometer on Nimbus-7. Journal of Geophysical Research 90:11631-41. Njoku, E. G., B. Rague, and K. Fleming. 1998. Nimbus-7 SMMR Pathfinder Brightness Temperature Data. JPL Publication 98-4. Jet Propulsion Laboratory. Pasadena, CA. Njoku, E. G. 1980. Antenna Pattern Correction Procedures for the Scanning Multichannel Microwave Radiometer (SMMR). Boundary-Layer Meteorology 18:79-98. Njoku, E. G., J. M. Stacey, and F. T. Barath. 1980. The Seasat Scanning Multichannel Microwave Radiometer (SMMR): Instrument Description and Performance. IEEE Journal of Oceanic Engineering OE-5:125-37. Swanson, P. N. and A. L. Riley. 1980. The Seasat Scanning Multichannel Microwave Radiometer (SMMR): Radiometric Calibration Algorithm Development and Performance. IEEE Journal of Oceanic Engineering OE-5:116-24. Systems and Applied Sciences Corporation. 1982. User's Guide for the Scanning Multichannel Microwave Radiometer Instrument First-Year Antenna Temperature Data Set. SASC, Contractor Report #NAS5-27393. Goddard Space Flight Center. Greenbelt, MD. Wentz, F. J. and E. A. Frances. 1992. Nimbus-7 SMMR Ocean Products 1979-1984. RSS Technical Report 033192. Remote Sensing Systems. Santa Rosa, CA.

This data set consists of brightness temperatures acquired from the Scanning Multichannel Microwave Radiometer (SMMR) on board the Nimbus-7 Pathfinder satellite. The brightness temperatures have been gridded onto the Equal-Area Scalable Earth Grid (EASE-Grid) and are presented in three different projections: Northern Hemisphere, Southern Hemisphere, and global. The SMMR EASE-Grid data were derived from SMMR brightness temperatures in swath format (level 1b data). Coverage is global, and data are available from 25 October 1978 through 20 August 1987. The spatial resolution is 25 km for all channels (6.6, 10.7, 18, 21, and 37 GHz for both vertical and horizontal polarizations). Both brightness temperatures and time files are provided for a given projection in flat binary format for each day. The brightness temperatures are provided in tenths of kelvins and the time files are in minutes since 0:00 Coordinated Universal Time (UTC) of the date of the enclosing file. Data are available via FTP. Users may also order data on CD-ROM while supplies last.

VIEW PROJECT HOME PAGE http://nsidc.org/data/nsidc-0002.html DMSP SSM/I Daily and Monthly Polar Gridded Sea Ice Concentrations VIEW PROJECT HOME PAGE http://nsidc.org/data/pathfinders/index.html NOAA/NASA Polar Pathfinder Data VIEW PROJECT HOME PAGE http://nsidc.org/daac/pathfinder/index.html Polar Pathfinder Program VIEW RELATED INFORMATION http://nsidc.org/data/ease/index.html All About EASE-Grid VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0001.html DMSP SSM/I Daily Polar Gridded Brightness Temperatures VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0032.html DMSP SSM/I Pathfinder Daily EASE-Grid Brightness Temperatures VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0009.html Nimbus-5 ESMR Polar Gridded Brightness Temperatures and Sea Ice Concentrations VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0036.html Nimbus-7 SMMR Pathfinder Brightness Temperatures VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0007.html Nimbus-7 SMMR Polar Radiances and Arctic and Antarctic Sea Ice Concentrations USA/NASA CEOS IDN DIF 9.7 2000-01-01 2012-07-18 changed preso format to binary