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Is Landsat 7 still operating?
The USGS and NASA are planning for Landsat 7 to remain on-station and fulfilling its current science mission until Landsat 9 completes its launch (scheduled for September 16, 2021), on-orbit checkout, and commissioning.
What is the radiometric resolution of Landsat 7 ETM+?
| Landsat sensor | MSS (LS-1-5) | ETM+ (LS-7) |
|---|---|---|
| Swath width | 185 km | 185 km |
| Spatial resolution | 80 m | 15 m PAN 30 m VNIR/SWIR 60 m TIR |
| Radiometric resolution | 6 bit | 9 bit (8 bit transmitted) |
| Band-to-band registration | 0.2 pixel (90%) |
What is the radiometric resolution of Landsat 7 ETM +?
15 m
The Enhanced Thematic Mapper Plus (ETM+) The primary new features on Landsat 7 are a panchromatic band with 15 m spatial resolution, an on-board full aperture solar calibrator, 5% absolute radiometric calibration and a thermal IR channel with a four-fold improvement in spatial resolution over TM.
How to fill gaps in SLC-off Landsat 7 ETM + images?
Can I use Qgis instead of proprietary software (ENVI, Erdas….) to fill the gaps? You could try the gdal_fillnodata tool which is also available in QGIS via the Raster->Analysis->Fill nodata menu. It uses an inverse distance weighting (IDW) interpolation.
Why are there gaps in the Landsat 7 images?
On 31 May 2003 the Landsat 7 Enhanced Thematic Mapper (ETM) sensor had a failure of the Scan Line Corrector (SLC). Since that time all Landsat ETM images have had wedge-shaped gaps on both sides of each scene, resulting in approximately 22% data loss.
How to fill the gaps in SLC-off imagery?
Based on the shortcomings in the above methods, the aim of this study is to demonstrate the application of a simple and effective method to fill the gaps in SLC-off ETM+ imagery.
Where can I find Landsat ETM + images for free?
Since that time all Landsat ETM+ images have had wedge-shaped gaps on both sides of each scene, resulting in approximately 22% data loss. These images are available for free download from the USGS GloVis website and are found in the L7 SLC-off collection.