Pre-event Sentinel-1 GRD high-resolution descending imagery

Original title西藏日喀则市吉隆县泥石流灾害（20260826）Sentinel-1_GRD-HD-DESCENDING-before.zip

zip · 3.7 GiB · National Cryosphere Desert Data Center

Metadata review: Assessed
Asset type: Earth Observation Imagery Or Product
File format: zip
Contributor: 国家冰川冻土沙漠科学数据中心；中科星图地球大数据中心 & 数据来源平台：GEOVIS Earth DataDaily 星图地球今日影像

Screening and metadata review

Baseline candidate · Metadata assessed 6 September 2026

Reachable without registration · Direct Open · checked 6 September 2026

Screening findings and extracted metadata

Automated metadata and technical review. Resource eligibility and manuscript inclusion are separate decisions.

Inspection basis: Metadata And Structure Reviewed
Temporal assessment: Pre Event
Provider: National Cryosphere Desert Data Center | GEOVIS Earth Big Data Center | GEOVIS Earth DataDailySource Recorded · source · catalogue contributor
Dataset family: Copernicus Sentinel-1Source Recorded · source · catalogue dataset family
Linked file format: zipSource Recorded · source · catalogue file_format
Rights statement: Copernicus Sentinel source terms are documented; terms for this packaged derivative have not been verified.Source Recorded · source · catalogue rights_note
Source observation start: 2026-08-19Source Recorded · source · catalogue temporal_start
Source observation end: 2026-08-24Source Recorded · source · catalogue temporal_end
Provider-stated file bytes: 4004330405Source Recorded · source · catalogue provider-stated size
HTTP response size: 4004330405Observed Http · source · HTTP HEAD Content-Length or Content-Range total; compressed transfer length may differ
Source identifier: d0ea5ca2-61d7-4b15-97ec-2fe50002aed8Derived From Metadata · source · Source URL component identifier; not a DOI or independent scene identity
File coordinate system: Not stated
File pixel spacing: Not stated
Source bounds (west, south, east, north): Not stated
Licence identifier: Not stated

Earlier structure findings are retained with their inspection date; the current HTTP check does not establish byte-for-byte identity with that earlier file.

Geographic coverage: No asset-level bounding box is stated. Parent resource coverage: Gyirong County and Port, Shigatse, Xizang; the Nepal side and China–Nepal transport corridor are referenced by the provider.
Temporal coverage: 19 August 2026 to 24 August 2026
Temporal role: Pre Event Reference
Catalogue asset identifier: ast-aeb9be8c-18c3-50cf-a8a3-cf334dfb799e
Parent resource: Scientific-data emergency response service for the 26 August 2026 debris-flow disaster in Gyirong County, Shigatse, Xizang
Original-title language: Chinese
English-title status: Not verified
Dataset or product family: Copernicus Sentinel-1
Coordinate reference system: Not stated
Spatial resolution: Not stated

Access result: Reachable without registration
Access checked: 6 September 2026
Media type: application/zip
File format: zip
File size: 3.7 GiB
Licence: Not verified — Copernicus Sentinel source terms are documented; terms for this packaged derivative have not been verified
Redistribution: Redistribution not authorized
Catalogue status: Reviewed

Host or aggregator: National Cryosphere Desert Data Center
Listed contributor: 国家冰川冻土沙漠科学数据中心；中科星图地球大数据中心 & 数据来源平台：GEOVIS Earth DataDaily 星图地球今日影像
Normalized contributor: National Cryosphere Desert Data Center | GEOVIS Earth Big Data Center | GEOVIS Earth DataDaily
Source role: NCDC Listed Contributor | GEOVIS Center Listed Contributor | GEOVIS Earth DataDaily Listed Source Platform
Upstream source: European Union Copernicus/ESA Copernicus Sentinel-1; NCDC and/or GEOVIS is the listed contributor
Upstream evidence: Mission Family Established; Granule IDs, Dates, Baselines, And Processing Unresolved
Relationship to resource: event-specific pre-event or post-event imagery package; exact scene/product relationship not stated
Provenance: Not verified
Method documentation: Not Stated At Asset Level On Event Page
Metadata reviewed: 3 September 2026
Technical inspection: Archive directory lists 6 members; formats .docx (1), .zip (4), [no extension] (1)