An initial suite of Landsat 7 Enhanced
Thematic Mapper Plus (ETM+) Scan Line Corrector (SLC)-off
data products were released through the Level 1 Product
Generation System (LPGS) on October 22, 2003.
Since that time, the USGS Earth Resources Observation Systems (EROS) has been implementing a series of improvements
to SLC-off products and processing, in order to enhance the overall usability of SLC-off data. Three of these product
enhancements are of particular importance to users
who require a fully populated SLC-off image product:
User-selected Interpolation - Released
Gap-filled Product (Phase 1: SLC-on to
SLC-off) - Released
Gap-filled Product (Phase 2: SLC-off to
SLC-off) - Fall 2004
In addition to the enhanced products above, the USGS
EDC will also be releasing a series of other improvements
in the near future. The Landsat 7 SLC-off product modifications
currently being implemented include:
The Landsat 7 browse image displayed
on all data ordering interfaces has been modified to
allow users to estimate the width of potential SLC-off
scan gaps over their area of interest. (
Details)
Released on Earth Explorer: December 8, 2003
Released on GloVis: January 29, 2004
Users now have the ability to select the number of pixels
that are interpolated across the data gaps during Level
1G processing. This will allow potential production
of a fully populated image when specified by the user.
(
Details)
Released: March 10, 2004
Users may now purchase National Landsat Archive Production
System (NLAPS) processing if desired, with increased
options for SLC-off data access and levels of processing.
(
Details)
Released: April 5, 2004
The initial (Phase 1) gap-filled image
product is generated by replacing the missing data
of an SLC-off scene with pixel values derived from a
coregistered, histogram-matched SLC-on scene. This technique results in a fully populated “wall-to-wall”
image product. (
Details)
Feleased: May 10, 2004
A second (Phase 2) gap-filled image
product will be generated from the merge of two or more
SLC-off scenes to produce a single image product. This
approach will result in a fully populated SLC-off scene,
with particular benefit for temporally sensitive studies.
(
Details)
Target release: Fall 2004
Band-specific gap mask files will be
included with all SLC-off Level 1G data products. (
Details)
Released: May 10, 2004