Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter V2019 Coherence

Dataset Availability

2019-12-01T00:00:00Z–2020-12-01T00:00:00Z

Dataset Producer

Earth Big Data LLC Alaska Satellite Facility Google Earth Engine

Earth Engine Snippet

ee.ImageCollection("Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/COHERENCE")

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.

Coherence is a measure of the similarity, or correlation, between two complex SAR images acquired over the same area at different times, ranging from 0 (no correlation/high noise) to 1 (perfect correlation). The dataset was generated by analyzing every possible image pair up to 48 days apart. It reports the median coherence for specific, standardized temporal baselines (repeat intervals) aggregated over each season.

The scale factor has already been applied to each of the bands. If you would like to do calculations using the digital numbers from the original rasters, load Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/COHERENCE_RAW instead.

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

• Backscatter
• Decay Model Parameters
• Incidence Layover Shadow

Bands

Pixel Size
92.7 meters

Bands

Name	Pixel Size	Description
fall_hh_COH06	meters	Median HH coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 6-day repeat interval.
fall_hh_COH12	meters	Median HH coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 12-day repeat interval.
fall_hh_COH18	meters	Median HH coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 18-day repeat interval.
fall_hh_COH24	meters	Median HH coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 24-day repeat interval.
fall_hh_COH36	meters	Median HH coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 36-day repeat interval.
fall_hh_COH48	meters	Median HH coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 48-day repeat interval.
fall_vv_COH06	meters	Median VV coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 6-day repeat interval.
fall_vv_COH12	meters	Median VV coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 12-day repeat interval.
fall_vv_COH18	meters	Median VV coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 18-day repeat interval.
fall_vv_COH24	meters	Median VV coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 24-day repeat interval.
fall_vv_COH36	meters	Median VV coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 36-day repeat interval.
fall_vv_COH48	meters	Median VV coherence for fall (Sep-Nov 2020) based on all coherence estimates for a 48-day repeat interval.
spring_hh_COH06	meters	Median HH coherence for spring (Mar-May 2020) based on all coherence estimates for a 6-day repeat interval.
spring_hh_COH12	meters	Median HH coherence for spring (Mar-May 2020) based on all coherence estimates for a 12-day repeat interval.
spring_hh_COH18	meters	Median HH coherence for spring (Mar-May 2020) based on all coherence estimates for a 18-day repeat interval.
spring_hh_COH24	meters	Median HH coherence for spring (Mar-May 2020) based on all coherence estimates for a 24-day repeat interval.
spring_hh_COH36	meters	Median HH coherence for spring (Mar-May 2020) based on all coherence estimates for a 36-day repeat interval.
spring_hh_COH48	meters	Median HH coherence for spring (Mar-May 2020) based on all coherence estimates for a 48-day repeat interval.
spring_vv_COH06	meters	Median VV coherence for spring (Mar-May 2020) based on all coherence estimates for a 6-day repeat interval.
spring_vv_COH12	meters	Median VV coherence for spring (Mar-May 2020) based on all coherence estimates for a 12-day repeat interval.
spring_vv_COH18	meters	Median VV coherence for spring (Mar-May 2020) based on all coherence estimates for a 18-day repeat interval.
spring_vv_COH24	meters	Median VV coherence for spring (Mar-May 2020) based on all coherence estimates for a 24-day repeat interval.
spring_vv_COH36	meters	Median VV coherence for spring (Mar-May 2020) based on all coherence estimates for a 36-day repeat interval.
spring_vv_COH48	meters	Median VV coherence for spring (Mar-May 2020) based on all coherence estimates for a 48-day repeat interval.
summer_hh_COH06	meters	Median HH coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 6-day repeat interval.
summer_hh_COH12	meters	Median HH coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 12-day repeat interval.
summer_hh_COH18	meters	Median HH coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 18-day repeat interval.
summer_hh_COH24	meters	Median HH coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 24-day repeat interval.
summer_hh_COH36	meters	Median HH coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 36-day repeat interval.
summer_hh_COH48	meters	Median HH coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 48-day repeat interval.
summer_vv_COH06	meters	Median VV coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 6-day repeat interval.
summer_vv_COH12	meters	Median VV coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 12-day repeat interval.
summer_vv_COH18	meters	Median VV coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 18-day repeat interval.
summer_vv_COH24	meters	Median VV coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 24-day repeat interval.
summer_vv_COH36	meters	Median VV coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 36-day repeat interval.
summer_vv_COH48	meters	Median VV coherence for summer (Jun-Aug 2020) based on all coherence estimates for a 48-day repeat interval.
winter_hh_COH06	meters	Median HH coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 6-day repeat interval.
winter_hh_COH12	meters	Median HH coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 12-day repeat interval.
winter_hh_COH18	meters	Median HH coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 18-day repeat interval.
winter_hh_COH24	meters	Median HH coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 24-day repeat interval.
winter_hh_COH36	meters	Median HH coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 36-day repeat interval.
winter_hh_COH48	meters	Median HH coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 48-day repeat interval.
winter_vv_COH06	meters	Median VV coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 6-day repeat interval.
winter_vv_COH12	meters	Median VV coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 12-day repeat interval.
winter_vv_COH18	meters	Median VV coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 18-day repeat interval.
winter_vv_COH24	meters	Median VV coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 24-day repeat interval.
winter_vv_COH36	meters	Median VV coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 36-day repeat interval.
winter_vv_COH48	meters	Median VV coherence for winter (Dec 2019-Feb 2020) based on all coherence estimates for a 48-day repeat interval.

Image Properties

Image Properties

Name	Type	Description
tile_id	STRING	Tile ID

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

• https://doi.org/10.1038/s41597-022-01189-6

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Code Editor (JavaScript)

var dataset =
    ee.ImageCollection('Earth_Big_Data/GLOBAL_SEASONAL_S1/V2019/COHERENCE');
var visParams = {
  bands: ['fall_hh_COH06'],
  min: 0,
  max: 0.75,
};
Map.setCenter(-45.2, 64.177, 5);
Map.addLayer(dataset, visParams, 'Fall HH COH06');

Open in Code Editor

Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter V2019 Coherence

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/COHERENCE, 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

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.1038/s41597-022-01189-6
• https://doi.org/10.1038/s41597-022-01189-6
• https://doi.org/10.1038/s41597-022-01189-6