← All sources
Near real-timeLive-testedOfficial documented API
Earth observation / Synthetic-aperture radar
Copernicus Sentinel-1 GRD radar scenes over Tbilisi
Copernicus Data Space exposes current Sentinel-1 Ground Range Detected radar acquisitions intersecting Tbilisi. Unlike optical imagery, C-band SAR works through clouds and at night. The tested same-day Sentinel-1C item includes VV and VH polarization rasters, acquisition and publication timestamps, exact footprint, orbit, incidence angle, instrument mode and 10-metre range/azimuth pixel spacing. Public catalog search is anonymous; raster downloads require CDSE credentials.
01
Provenance and access
How the data is reached
Unauthenticated STAC search. VV/VH measurement rasters and SAFE product downloads use authenticated CDSE S3/OIDC access.
Reuse status
Copernicus Sentinel data legal notice; STAC declares license=other
Read license or terms ↗Tbilisi Sentinel-1 search
https://stac.dataspace.copernicus.eu/v1/search?bbox=44.70,41.67,44.88,41.80&collections=sentinel-1-grd&datetime=2026-07-01T00:00:00Z/2026-07-22T23:59:59Z&limit=2 ↗- Method
- GET
- Format
- GeoJSON/STAC JSON
- Authentication
- None for catalog
Collection metadata
https://stac.dataspace.copernicus.eu/v1/collections/sentinel-1-grd ↗- Method
- GET
- Format
- STAC Collection JSON
- Authentication
- None
02
Field-level detail
What is actually returned
livereferencederivedhistoricalunknown
Sentinel-1 STAC Item
Radar acquisition metadata and assets.
| Field / path | Type | Null? | Example | Meaning | Freshness |
|---|---|---|---|---|---|
id / collection / bbox / geometry | string / string / bbox / GeoJSON Polygon | No | S1C_IW_GRDH…_COG / sentinel-1-grd / scene footprint | Product identity and spatial coverage | reference |
properties.datetime / start_datetime / end_datetime | ISO datetime | No | 2026-07-22T03:07:46.092165Z to 03:08:11.090870Z | Radar acquisition interval | reference |
properties.created / published / updated / processing:datetime | ISO datetime | No | 2026-07-22T05:17:46.912930Z | Ingestion, processing and publication times | reference |
properties.platform / constellation / instruments[] | string / string / array | No | sentinel-1c / sentinel-1 / [sar] | Spacecraft, mission and sensor | reference |
properties.product:type / processing:level / processing:version | string | No | IW_GRDH_1S / L1 / 01.00 | Radar product and processing level | reference |
properties.sar:polarizations[] | array<enum> | No | [VV,VH] | Available co- and cross-polarized measurements | reference |
properties.sar:frequency_band / sar:center_frequency | string / GHz number | No | C / 5.405 | Radar frequency band and center frequency | reference |
properties.sar:instrument_mode | enum | No | IW | Interferometric Wide swath mode | reference |
properties.sar:pixel_spacing_range / sar:pixel_spacing_azimuth | metre numbers | No | 10 / 10 | Ground-range and along-track pixel spacing | reference |
properties.sar:observation_direction / view:incidence_angle / view:azimuth | string / degree numbers | No | right / 39.147 / 193.610 | Radar viewing geometry | reference |
properties.sat:absolute_orbit / sat:relative_orbit / sat:orbit_cycle / sat:orbit_state | integers / enum | No | 8650 / 152 / 53 / descending | Orbit metadata | reference |
properties.product:timeliness / product:timeliness_category | string | No | PT24H / Fast-24h | Delivery class | reference |
properties._private.product_name / product_size / product_uuid | string / integer / UUID | No | SAFE name / 1159985627 / UUID | Product download identity and byte size | reference |
assets | object | No | vv, vh, calibration/noise/product schemas, SAFE manifest, Product, thumbnail | Radar data and supporting metadata files | reference |
Radar asset families
All asset names returned in the validated item.
| Field / path | Type | Null? | Example | Meaning | Freshness |
|---|---|---|---|---|---|
vv / vh | raster assets | No | measurement TIFFs | Vertical-vertical and vertical-horizontal backscatter measurements | reference |
schema-calibration-vv/vh | XML assets | No | calibration annotation | Radiometric calibration metadata | reference |
schema-noise-vv/vh | XML assets | No | noise annotation | Thermal-noise metadata | reference |
schema-product-vv/vh | XML assets | No | product annotation | Per-polarization product metadata | reference |
Product / safe_manifest / thumbnail | ZIP / XML / JPEG assets | No | full SAFE archive and overview | Whole product, manifest and quicklook | reference |
03
Representative evidence
Sample records
Same-day Tbilisi-intersecting radar scene
Retrieved 2026-07-22 14:03 Asia/Tbilisi
{"id":"S1C_IW_GRDH_1SDV_20260722T030746_20260722T030811_008650_01123C_500E_COG","properties":{"start_datetime":"2026-07-22T03:07:46.092165Z","published":"2026-07-22T05:17:46.912930Z","platform":"sentinel-1c","sar:polarizations":["VV","VH"],"sar:instrument_mode":"IW","sar:pixel_spacing_range":10,"view:incidence_angle":39.1472,"sat:relative_orbit":152},"assetKeys":["vv","vh","thumbnail"]}04
Boundaries
Reliability, caveats, and privacy
What held up
- Same-day scene and processing timestamps were present
- Cloud-independent SAR complements optical Sentinel-2
- Calibration and noise metadata are supplied alongside measurements
What can go wrong
- Raster downloads require CDSE credentials
- GRD amplitude/backscatter is not a ready-made flood or damage label
- Terrain, incidence angle, speckle and calibration affect comparisons
- Pixel spacing is not equivalent to independent spatial resolution
05
Source trail
Primary pages and documentation
https://stac.dataspace.copernicus.eu/v1/collections/sentinel-1-grd- DocumentationCDSE STAC documentation ↗
https://documentation.dataspace.copernicus.eu/APIs/STAC.html - DocumentationSentinel data legal notice ↗
https://sentinels.copernicus.eu/documents/247904/690755/Sentinel_Data_Legal_Notice