texas_flood_202507/dist

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Service Description:

Researchers working with the Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at NASA's Jet Propulsion Laboratory, Pasadena, California, created the OPERA Surface Disturbance Alert from Sentinel-1 (DIST-S1-ALERT) prototype product suite to create maps of surface disturbance due to the flooding in Central Texas on July 2025.

The OPERA DIST-S1 prototype results posted here are preliminary results, primarily intended to aid the field response and people who wanted to have a rough first look area impacted by the floods. The ARIA-share website has always focused on posting preliminary results as fast as possible for urgent response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind. Use at your own risk.

OPERA DIST-S1-ALERT

DIST-S1-ALERT products identify areas of detected disturbance or change based on statistical deviations from a baseline of reference SAR images. While these disturbances often include forest loss, they are not limited to it and may capture a broader range of disturbances.

GEN-DIST-STATUS (Generic Disturbance Status)

This layer represents disturbance detected from SAR observations using a transformer-based metric, aggregated across all tracks within a given MGRS tile. The discrete values in this layer indicate moderate and strong disturbance levels, reflecting the confidence of detected change.

First: Detected in a single observation.

Provisional: Detected in two or more consecutive observations.

Confirmed: Cumulative confirmation confidence exceeds a threshold (typically reached after three consecutive detections).

The strength of confirmed disturbances is determined by the strongest observed change across the sequence of consecutive observations (i.e. moderate, high).

Layer Values:

0: No Disturbance
1: First Moderate Disturbance
2: Provisional Moderate Disturbance
3: Confirmed Moderate Disturbance
4: First High Disturbance
5: Provisional High Disturbance
6: Confirmed High Disturbance
7: Confirmed Low Finished
8: Confirmed High Finished
255: No Data

Released July 16, 2025.

---------------------------------

Satellite/Sensor:

Synthetic Aperture Radar (SAR) instrument on European Space Agency's (ESA) Sentinel-1A satellite.

Resolution:

30 meters

OPERA DIST-S1-ALERT data availability:

The OPERA DIST-S1-ALERT products produced by ARIA/OPERA - JPL, contain modified Copernicus data (2025). The post-processed products are available to download at https://aria-share.jpl.nasa.gov/20250704_Texas_Floods/DIST-S1/

Product POCs:

Mary Grace Bato (mary.grace.p.bato@jpl.nasa.gov)

Jungkyo Jung (jungkyo.jung@jpl.nasa.gov)

Talib Oliver Cabrera (talib.oliver.cabrera@jpl.nasa.gov)

Steven Chan (steventsz.k.chan@jpl.nasa.gov)

Credits:

Sentinel-1 data were accessed through the Copernicus Open Hub and the Alaska Satellite Facility server. The product contains modified Copernicus Sentinel data (2025), processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA and OPERA team. The products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory.

NASA JPL-Caltech ARIA/OPERA Team

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Files:

OPERA_L3_DIST-ALERT-S1_V1_GEN-DIST-STATUS_2025-07-11_mosaic.tif shows surface disturbance as of July 11, 2025 00:35:23 (UTC) or July 11, 2025 19:35:24 (CST).

Last Update 21 July 2025

Map Name: dist_s1

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OPERA GEN-DIST-STATUS (0)

Description: Researchers working with the Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at NASA's Jet Propulsion Laboratory, Pasadena, California, created the OPERA Surface Disturbance Alert from Sentinel-1 (DIST-S1-ALERT) prototype product suite to create maps of surface disturbance due to the flooding in Central Texas on July 2025. The OPERA DIST-S1 prototype results posted here are preliminary results, primarily intended to aid the field response and people who wanted to have a rough first look area impacted by the floods. The ARIA-share website has always focused on posting preliminary results as fast as possible for urgent response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind. Use at your own risk.OPERA DIST-S1-ALERTDIST-S1-ALERT products identify areas of detected disturbance or change based on statistical deviations from a baseline of reference SAR images. While these disturbances often include forest loss, they are not limited to it and may capture a broader range of disturbances.GEN-DIST-STATUS (Generic Disturbance Status)This layer represents disturbance detected from SAR observations using a transformer-based metric, aggregated across all tracks within a given MGRS tile. The discrete values in this layer indicate moderate and strong disturbance levels, reflecting the confidence of detected change.First: Detected in a single observation.Provisional: Detected in two or more consecutive observations.Confirmed: Cumulative confirmation confidence exceeds a threshold (typically reached after three consecutive detections).The strength of confirmed disturbances is determined by the strongest observed change across the sequence of consecutive observations (i.e. moderate, high).Layer Values:0: No Disturbance1: First Moderate Disturbance2: Provisional Moderate Disturbance3: Confirmed Moderate Disturbance4: First High Disturbance5: Provisional High Disturbance6: Confirmed High Disturbance7: Confirmed Low Finished8: Confirmed High Finished255: No DataReleased July 16, 2025.---------------------------------Satellite/Sensor:Synthetic Aperture Radar (SAR) instrument on European Space Agency's (ESA) Sentinel-1A satellite.Resolution:30 metersOPERA DIST-S1-ALERT data availability:The OPERA DIST-S1-ALERT products produced by ARIA/OPERA - JPL, contain modified Copernicus data (2025). The post-processed products are available to download at https://aria-share.jpl.nasa.gov/20250704_Texas_Floods/DIST-S1/Product POCs:Mary Grace Bato (mary.grace.p.bato@jpl.nasa.gov)Jungkyo Jung (jungkyo.jung@jpl.nasa.gov)Talib Oliver Cabrera (talib.oliver.cabrera@jpl.nasa.gov)Steven Chan (steventsz.k.chan@jpl.nasa.gov)Credits:Sentinel-1 data were accessed through the Copernicus Open Hub and the Alaska Satellite Facility server. The product contains modified Copernicus Sentinel data (2025), processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA and OPERA team. The products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory.NASA JPL-Caltech ARIA/OPERA Team==================Files: OPERA_L3_DIST-ALERT-S1_V1_GEN-DIST-STATUS_2025-07-11_mosaic.tif shows surface disturbance as of July 11, 2025 00:35:23 (UTC) or July 11, 2025 19:35:24 (CST). Last Update 21 July 2025

Service Item Id: bb1a29ca6f0e4f9fba2bb0e2521e9918

Copyright Text: NASA JPL-Caltech-UMD ARIA/OPERA Team

Spatial Reference: 32614 (32614)

Single Fused Map Cache: false

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texas_flood_202507/dist_s1 (MapServer)