Radar & SAR Remote SensingPaired Acquisition Derived Sar ProductFree registration required

NISAR wrapped interferogram (RIFG) — 2026-08-16 / 2026-08-28 · track 48, frame 74 · geographic thumbnail preview

EnglishNISAR_L1_UR_RIFG_028_048_D_074_029_2000_SH_20260816T125812_20260816T125846_20260828T125812_20260828T125846_P05023_F_F_J_001_LATLON_thumbnail.png

Preview Not Independent Observation

Access through free registration

Not stated

Dataset Specifications

Spatial extent	Parent resource coverage: Gyirong/Langtang source area and the Bhote Koshi–Trishuli corridor downstream to Devghat, Nepal and Tibet. Query envelope WGS84 [84.3976, 27.7320, 85.5508, 28.3500]; full scene footprints retained.
Temporal coverage	Not statedPaired Acquisition Derived Sar Product
Source & contributor	NASA / ISRO; NASA JPL processing; ASF distributionHost platform: NASA ASF / Earthdata
Parent collection	NISAR urgent-response Level 1 radar products — Nepal corridor
Format & size	PNG · Not stated
Licence & access	Free Registration Or Authentication Documented · Provider Or Collection Terms — NASA NISAR science data documented free/open; Earthdata registration required for protected science routes
Lineage & documentation	Not stated

Catalogue assessment and metadata evidence

Assessment recorded

Completed catalogue decisions are recorded separately from technical inspection and scientific validation. Access and metadata evidence retain their original dates and scope.

Completed catalogue assessment

Eligibility decision: Include · Retain Ancillary Preview
Assessment date: 28 September 2026
Decision reason: Original metadata identifies an associated preview. Retain the link without assigning raster measurement properties or independent observation status; no image inspection.
Information role: Preview Not Independent Observation
Scientific validation: not_performed_by_catalogue_review
Rights: NASA NISAR science data documented free/open; Earthdata registration required for protected science routes
Coverage Interpretation: Native acquisition and footprint are parent-scene properties, not preview georeferencing
Recorded access: Registration Required As Documented
Source assessment: Original metadata identifies an associated preview. Retain the link without assigning raster measurement properties or independent observation status; no image inspection.
Limitations: Source acquisition dates, footprint and resolution describe the parent observation; they do not establish georeferencing or pixel spacing for this preview or metadata file.; Paired radar product: reference and secondary acquisition intervals are recorded separately; the interval is not continuous observation.; Urgent-response radar product. Its processing level and radar parameters do not alone establish flood extent or field-validated damage.; NASA documents free Earthdata registration. This review did not sign in or retrieve protected science files; anonymous denial is not a finding that the dataset is unavailable.
Rights assessment: NASA NISAR science data documented free/open; Earthdata registration required for protected science routes
Assessment evidence: Source 1: search.earthdata.nasa.gov
Source 2: api.daac.asf.alaska.edu
Source 3: nisar-docs.asf.alaska.edu

Supporting asset · Metadata assessed 6 September 2026

Free registration required · Free Registration · checked 6 September 2026

Screening findings and extracted metadata

Metadata and technical findings retain their original inspection scope and evidence dates. Catalogue eligibility and source scientific validation are recorded separately.

Inspection basis: Metadata Reviewed Body Not Inspected
Temporal assessment: Paired Acquisition Derived Sar Product
Provider: NASA / ISRO; NASA JPL processing; ASF distributionSource Recorded · source · catalogue contributor
Dataset family: NISAR RIFGSource Recorded · source · catalogue dataset family
Linked file format: PNGSource Recorded · source · catalogue file_format
Rights statement: NASA ASF documentation requires free Earthdata Login authentication for NISAR science downloads. Asset-specific reuse terms and any access restrictions remain to be assessed; public catalogue/browse access is not science-file authorization.Source Recorded · source · catalogue rights_note
Source observation start: 2026-08-16T12:58:12ZDerived From Metadata · source · NISAR reference acquisition start in granuleName
Source identifier: NISAR_L1_UR_RIFG_028_048_D_074_029_2000_SH_20260816T125812_20260816T125846_20260828T125812_20260828T125846_P05023_F_F_J_001Source Recorded · source · relationship_to_parent.granuleName
Sensor: L-SARSource Recorded · source · relationship_to_parent.sensor
Processing level: RIFGSource Recorded · source · relationship_to_parent.processingLevel
Source observation end: 2026-08-28T12:58:46ZDerived From Metadata · source · NISAR secondary acquisition stop in granuleName
Product processing time: 2026-08-29T04:30:32ZSource Recorded · source · relationship_to_parent.processingDate
Source bounds (west, south, east, north): [84.62017,27.4357,87.85933,30.11524]Derived From Metadata · source · ASF stringFootprint WKT envelope
File coordinate system: Not Applicable To Catalogued Role
File pixel spacing: Not Applicable To Catalogued Role
Radar acquisition intervals: ["2026-08-16T12:58:12Z","2026-08-16T12:58:46Z","2026-08-28T12:58:12Z","2026-08-28T12:58:46Z"]Derived From Metadata · source · NISAR granuleName acquisition timestamps in identifier order
Licence identifier: Not Stated

Source acquisition dates, footprint and resolution describe the parent observation; they do not establish georeferencing or pixel spacing for this preview or metadata file.
Paired radar product: reference and secondary acquisition intervals are recorded separately; the interval is not continuous observation.
Urgent-response radar product. Its processing level and radar parameters do not alone establish flood extent or field-validated damage.
NASA documents free Earthdata registration. This review did not sign in or retrieve protected science files; anonymous denial is not a finding that the dataset is unavailable.

Download screening decisions · Download all metadata and field sources

Dataset Specifications

Completed catalogue assessment

Authoritative Metadata Sources