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What is a sentinel image?
SENTINEL-2 is a European wide-swath, high-resolution, multi-spectral imaging mission. The full mission specification of the twin satellites flying in the same orbit but phased at 180°, is designed to give a high revisit frequency of 5 days at the Equator. The orbital swath width is 290 km.
What is resolution of Sentinel 1 and 2?
Radiometric resolution is a measure of the ability of an imaging system to record different levels of brightness or tone. The radiometric resolution of Sentinel-2 is 12-bit.
Is Sentinel 2 data free?
All Sentinel-2 data products are provided free of charge to all data users, including the general public, and scientific and commercial users under the terms and conditions prescribed by the European Commission’s Copernicus Programme.
What is the swath width of Sentinel 2?
Swath Width. The swath width of SENTINEL-2 is 290 km. In comparison, the swath width of LANDSAT 5 TM and LANDSAT 7 ETM+ is 185 km, and the swath width of SPOT-5 is 120 km.
What are the characteristics of a Sentinel satellite?
When the satellite is put into this mode, the instrument provides constant coverage which uses a geometric resolution of 5 x 5 m with a swath width of 80 km. There are six swaths and each one has an antenna capable of generating a beam with fixed azimuth and elevation pointing. This kind of elevation beamforming is used to suppress range ambiguity.
How can I detect changes in Sentinel-1 imagery?
The JavaScript and Python API’s to GEE can then be easily programmed to analyze time series of Sentinel-1 acquisitions virtually anywhere on the globe. Detected changes, both short- and long-term, can be related to landscape dynamics and human activity.
Which is worst case scenario for Sentinel 1?
The Sentinel-1 C-SAR system has been enabled to use TOPS burst synchronization which uses repeat-pass data-takes to help support the generation of TOPS interferograms and coherent radar change detection. For the the IW and EW modes the TOPS burst duration ranges from 0.82 secs to 0.54 secs are the worst case scenario.