Where can I find the Sentinel 1 data?
Sentinel-1 data are available from ESA from a Rolling Archive that delivers data within 24 hours of acquisition and maintains recent months of data. Registration is required, and terms and conditions apply.
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.
What was the purpose of the Sentinel 1 satellite?
Shortly after the August 2014 South Napa earthquake, data collected by Sentinel-1A was used to develop an interferometric synthetic-aperture radar, or InSAR, image of the affected region. The Sentinel-1 satellites are expected to make analysis of earthquakes using InSAR techniques quicker and simpler.
What are the instruments on the Sentinel 1?
Sentinel-1 spacecraft are designed to carry the following instruments: A single C-bandsynthetic-aperture radar (C-SAR) with its electronics. This instrument provides 1 dB radiometric accuracy with a central frequency at 5.405 GHz.
How are search results for Sentinel granules bundled?
Search results for Sentinel granules are bundled, so regardless of the processing level of the original search granule (RAW, SLC, GRD or OCN), all other related granules are shown as well.
What is the interferometric wide mode of the Sentinel-1?
The Interferometric Wide (IW) swath mode is the main acquisition mode over land for Sentinel-1. It acquires data with a 250km swath at 5m x 20m spatial resolution (single look). IW mode captures three sub-swaths using the Terrain Observation with Progressive Scans SAR (TOPSAR) acquisition principle.
How are ground range coordinates used in Sentinel?
The terrain height used varies in azimuth but is constant in range (but can be different for each IW/EW sub-swath). Ground range coordinates are the slant range coordinates projected onto the ellipsoid of the Earth. Pixel values represent detected amplitude. Phase information is lost.
When to use Sentinel-1 GRD in s1grd?
Use sentinel-1-grd (previously S1GRD) as the value of the input.data.type parameter in your API requests. This is mandatory and will ensure you get Sentinel-1 GRD data. This chapter will explain the input.data.dataFilter object of the S1GRD process API. The same as for S2L1C.
Can you use radiometric terrain correction in Sentinel 1?
Radiometric terrain correction is not supported. Use sentinel-1-grd (previously S1GRD) as the value of the input.data.type parameter in your API requests. This is mandatory and will ensure you get Sentinel-1 GRD data. This chapter will explain the input.data.dataFilter object of the S1GRD process API.