NISAR radar acquisitions and urgent-response product access for the Nepal cascade corridor
- Outcome
- Completed
- Search date
- Source
- NASA ASF / Earthdata
- Reference
- RUN-20260905-015
- Aim
- Inventory NISAR urgent-response acquisition metadata and product access routes over the corridor.
- Source and interface
- NASA ASF / Earthdata — ASF public search API and CMR
- Search method
- Query ASF NISAR products intersecting POLYGON((84.3976 27.7320,85.5508 27.7320,85.5508 28.3500,84.3976 28.3500,84.3976 27.7320)) from 2026-06-27T00:00:00Z through the run cutoff. Retrieve all results without an artificial result cap and retain only explicitly marked urgent-response products, preserving ordinary products as out-of-strand records. If needed, use the CMR urgent-response collection metadata and paginate granules. Record catalogue, browse and science access separately. The unfiltered query exceeded the API unbounded-search limit. A documented adaptation used dataset=NISAR&productionConfiguration=UR&bbox=84.3976,27.7320,85.5508,28.3500&start=2026-06-27T00:00:00Z&end=2026-09-05T11:21:41Z&output=json with no maxResults; output=count returned 34. CMR collections query: short_name=*UR*&options[short_name][pattern]=true&platform=NISAR&page_size=100&page_num=1. Three collection records returned.
- Criteria
No language or cloud exclusion. Dedicated releases include all supplied historical references. Spatial searches use WGS84 [84.3976,27.7320,85.5508,28.3500], 2026-06-27T00 00:00Z to 2026-09-05T11:21:41Z. No provider requests or bulk science downloads. - Coverage
- Complete event-specific release, including provider-supplied historical references. Results-examined unit: urgent-response product granules.
- Stopping rule
- Exhaust every publicly exposed matching record and metadata pagination link.
- Result
34 urgent-response product granules; 3 discovery records with documented dispositions; 510 distinct asset URLs within this run. New candidate resources remain under review; repeated routes retain existing candidate identities. Initial broad NISAR requests hit the documented SearchAPI refusal for more than 2000 expected results. Before retrying, the native productionConfiguration=UR filter was recorded as an equivalent expression of the frozen urgent-response eligibility. The unbounded UR response contained 34 granules and the source count endpoint returned 34. No maxResults truncation was used. CMR keyword nisar_ur returned no collection rows; the short-name pattern *UR* with platform=NISAR returned the three authoritative UR collections (Level 0B, 1 and 2). These are three resource identities; the 34 granules and multiple science/browse/support files do not increase resource counts. CMR states UR granules may later be removed after standard production becomes available. Native product identifiers, processing versions, source metadata and discovery dates are retained to support future replacement tracing. Public metadata also exposes private support paths; these were recorded privately and not exported as public assets.
NISAR urgent-response raw radar data — Nepal corridor
NISAR urgent-response Level 1 radar products — Nepal corridor
NISAR urgent-response Level 2 radar products — Nepal corridor