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<font face='Univers condensed',Helvetica,Arial size=+2>News Release

<font face='Univers condensed',Helvetica,Arial size=-1>U.S. Department of the Interior
<font face='Univers condensed',Helvetica,Arial size=-1>U.S. Geological Survey

<font face='Univers condensed',Helvetica,Arial size=-1>Address
Office of Communication
119 National Center
Reston, VA 20192
<font face='Univers condensed',Helvetica,Arial size=-1>Release
May 7, 2004
<font face='Univers condensed',Helvetica,Arial size=-1>Contact
Ron Beck
<font face='Univers condensed',Helvetica,Arial size=-1>Phone
605-594-6551
<font face='Univers condensed',Helvetica,Arial size=-1>Fax


<font face='Univers condensed',Helvetica,Arial size=+2>USGS Reduces Price for Landsat 7 Scenes

The U.S. Geological Survey (USGS) is reducing the price of Landsat 7 scenes with gaps in data resulting from a satellite anomaly in May of 2003. Scenes that contain gaps in data will be reduced from $600 to $250. Scenes with the gaps filled in using data acquired prior to the anomaly will also be offered at a reduced price of $275 beginning May 10, 2004.

The new product being offered for $275 will have the gap areas filled in with Landsat 7 data acquired prior to the scan line corrector (SLC) failure at a similar time of the year. The two scenes are geometrically registered, and a histogram matching technique is applied to the fill pixels that provide the best-expected radiance values for the missing data.

The new product represents an effort by the USGS Landsat 7 Project at the EROS Data Center in Sioux Falls, South Dakota to increase the utility of the Landsat 7 Enhanced Thematic Mapper Plus (ETM+) data affected by the non-functional scan line corrector.

The USGS is continuing to research other methods of providing better merged data products and will continue to provide information resulting from this work as it becomes available.

A sample product, with a comparison of the degraded data, further information, a complete list of the new pricing structure, and regular updates on planned product releases can be found at http://landsat7.usgs.gov/slc_enhancements/.

The USGS serves the nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.

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U.S. Geological Survey, MS119 National Center, Reston, VA 20192, USA
URL http://www.usgs.gov/public/press/public_affairs/press_releases/pr1879m.html
Contact: beck@usgs.gov
Last Modification: 5-12-2004@11:38am(HF)