Introduction
This block provides medium-resolution Sentinel-1 GRD images. These images are acquired by the twin constellation Sentinel-1A and Sentinel-1B every 6 days anywhere on the globe. The datasets are available starting with 2014.
Technical information
Compatible blocks
| Compatible blocks |
|---|
| Flood Mapping using Sentinel-1 SAR |
Geographic coverage
The geographic coverage is global.
Dataset description
Sentinel-1 GRD images are level-1 products that have been detected, multi-looked and projected to ground range using the Earth ellipsoid model WGS84.
Dataset information
| Specifications | Description |
|---|---|
| Pixel spacing | 10x10 m (HR SM) 10x10 m (HR IW) 25x25 m (HR EW) |
| Spatial resolution | 23x23 m (HR SM) 20x22 m (HR IW) 50x50 m (HR EW) |
| Image type | Radar |
| Acquisition mode | Stripmap (SM) Interferometric Wide swath (IW) Extra-Wide swath (EW) |
| Orbit direction | Ascending Descending |
| Spectral band | C band (central frequency 5.404 GHz) |
| Polarisations | HH HV VV VH |
| Geometric processing level | Projected |
| Radiometric processing level | Level-1 Ground Range Detected |
| Revisit frequency | Every 6 days (for Constellation) |
| Data availability | 2014-present |
| Incidence angle | 18.3° - 46.8° (SM) 29.1° - 46.0° (IW) 18.9° - 47.0° (EW) |
| File format | GeoTIFF |
| Bit depth | 8 bits per pixel |
| Coordinate system | EPSG 3857 |
| Can be reused in an UP42 workflow | Yes |
Limitations
- Data retrieval: The block retrieves images as geo-referenced map tiles overlapping the AOI (WMTS).
- Data availability: The rolling archive comprises 9 months. A more extensive archive is available upon request.
How it works
| Supported JSON parameters | Default value | Min | Max | Examples |
|---|---|---|---|---|
ids | null | n.a. | n.a. | "ids": ["S1A_IW_GRDH_1SDV_20211107T165433_20211107T165458_040468_04CC59_E78F"] |
time | "2018-01-01T00:00:00+00:00/2021-12-31T23:59:59+00:00" | 01.04.2014 | present | "time": "2015-04-01T00:00:00+00:00/2017-04-30T23:59:59+00:00" |
limit | 1 | 1 | 500 | "limit": 80 |
time_series | null | 01.04.2014 | present | "time_series":["2019-03-27T00:00:00+00:00/2019-04-02T00:00:00+00:00", "2017-09-30T00:00:00+00:00/2017-10-05T00:00:00+00:00", "2016-09-12T00:00:00+00:00/2016-09-20T00:00:00+00:00"] |
orbit_direction | null | n.a. | n.a. | "orbit_direction": DESCENDING |
acquisition_mode | null | n.a. | n.a. | "acquisition_mode": "IW" |
bbox/contains/intersects | null | n.a. | n.a. | Please check the examples from the JSON parameters. |
Examples
Example based on a workflow created with the data block Sentinel-1 L1 GRD (Geotiff):
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Capabilities
Output
raster
| up42_standard | |
|---|---|
bands | {
"or": [
[
"HH",
"HV",
"alpha"
],
[
"VV",
"VH",
"alpha"
],
[
"HH",
"alpha"
],
[
"VV",
"alpha"
]
]
} |
dtype | uint8 |
format | GTiff |
sensor | Sentinel1GRD |
resolution | 10 |
processing_level | l1 |
To know more please check the block capabilities specifications.
For more information, please refer to the marketplace.