Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter V2019 Incidence Layover Shadow

Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/INCIDENCE_LAYOVER_SHADOW
Dataset Availability
2019-12-01T00:00:00Z–2020-12-01T00:00:00Z
Dataset Producer
Earth Engine Snippet
ee.ImageCollection("Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/INCIDENCE_LAYOVER_SHADOW")
Tags
earth-big-data jpl nasa polarization radar sar satellite-imagery seasonal sentinel1-derived

Description

This data set is the first-of-its-kind spatial representation of multi-seasonal, global C-band Synthetic Aperture Radar (SAR) interferometric repeat-pass coherence and backscatter signatures. Coverage comprises land masses and ice sheets from 82 degrees Northern to 79 degrees Southern latitudes. The data set is derived from multi-temporal repeat-pass interferometric processing of about 205,000 Sentinel-1 C-band SAR images acquired in Interferometric Wide-Swath Mode from 1-Dec-2019 to 30-Nov-2020.

This dataset contains ancillary data to aid in the interpretation and processing of the backscatter and coherence products.

Other datasets derived from Sentinel-1 observations over the same time period include:

Bands

Pixel Size
92.7 meters

Bands

Name Units Pixel Size Description
inc deg meters

The angle between the incoming radar signal path and the normal vector to the local ground surface at each pixel.
lsmap meters

Layover/Shadow mask:

  • 1 = No Shadow or Layover
  • 5 = Layover: A geometric distortion where features at higher elevations are displaced toward the radar (appearing before features at lower elevations), making measurement impossible.
  • 17 = Shadow: Areas hidden from the radar beam (behind steep slopes or tall objects) where no signal is received, resulting in zero or near-zero measured backscatter and coherence.
  • 21 = Shadow in Layover

Image Properties

Image Properties

Name Type Description
tile_id STRING

Tile ID
relative_orbit_number INT

Relative orbit number.
flight_direction STRING

Flight direction: "A" for ascending or "D" for descending.

Terms of Use

Terms of Use

CC-BY-4.0

Citations

Citations:

  • Kellndorfer, J., Cartus, O., Lavalle, M. et al. Global seasonal Sentinel-1 interferometric coherence and backscatter data set. Sci Data 9, 73 (2022). doi:10.1038/s41597-022-01189-6.

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection(
    'Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/INCIDENCE_LAYOVER_SHADOW');
var visParams = {
  bands: ['inc'],
  min: 30,
  max: 70,
};
Map.setCenter(-45.2, 64.177, 5);
Map.addLayer(dataset, visParams, 'Incidence Angle');
Open in Code Editor
This data set is the first-of-its-kind spatial representation of multi-seasonal, global C-band Synthetic Aperture Radar (SAR) interferometric repeat-pass coherence and backscatter signatures. Coverage comprises land masses and ice sheets from 82 degrees Northern to 79 degrees Southern latitudes. The data set is derived from multi-temporal repeat-pass interferometric processing of about …
Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/INCIDENCE_LAYOVER_SHADOW, earth-big-data,jpl,nasa,polarization,radar,sar,satellite-imagery,seasonal,sentinel1-derived
2019-12-01T00:00:00Z/2020-12-01T00:00:00Z
-79 -180 82 180
Google Earth Engine