NISAR Urgent Response Products for Earthquakes
Synthetic aperture radar (SAR) data is now a well-known source of surface displacement data for earthquakes under or near land. The NASA-ISRO SAR (NISAR) mission is a new SAR satellite with two radar systems, the L-band (24 cm wavelength) SAR provided by NASA and the S-band (12 cm wavelength) SAR provided by ISRO and has a 12-day repeat cycle. The L-band SAR is operated over all land areas reachable by the radar beam which is looking to the left of the 240 km wide satellite track (southward), while the S-band SAR is operated over South Asia and a few other locations. NISAR entered the science operations phase at the beginning of January 2026. NISAR is the first SAR satellite to provide the standard products that include level 2 geocoded unwrapped interferograms (GUNW) for the adjacent-in-time pairs of NISAR scenes with 80-meter pixel spacing. The GUNW products include an estimate of the ionospheric correction (phase screen). The analysis-ready data (HDF5) files for the GUNW products also include geocoded wrapped interferograms with 20-meter pixel spacing. The NISAR L-band SAR data products will be available soon through the NASA EarthData system, easily searchable through the Alaska Satellite Facility graphical search tool or through applications programming interfaces. The NISAR S-band products will be available through the ISRO data portal. The standard product latency provides the processed L2_L_GUNW data within two days after acquisition by the satellite, when the most accurate satellite orbits are available. The NISAR mission has a special urgent response system that can give higher priority to the data downlink from the satellite and expedited L-band processing using preliminary orbits with a goal of products available, including GUNW, within 5 hours after satellite acquisition. The NISAR urgent response is triggered from the USGS earthquake feed based on magnitude (near USA or India magnitude 7.0 with depth less than 50 km) or on the PAGER estimate (yellow in USA and India or orange/red in rest of the world).
Session: New Possibilities for InSAR in Earthquake Science: the NISAR Mission and OPERA Displacement Maps - I
Type: Oral
Room: Ballroom H
Date: 4/15/2026
Presentation Time: 08:30 AM (local time)
Presenting Author: Eric Fielding
Student Presenter: No
Invited Presentation:
Poster Number:
Additional Authors
Eric Fielding Presenting Author Corresponding Author eric.j.fielding@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology |
Cathleen Jones cathleen.e.jones@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology |
Mark Simons simons@caltech.edu California Institute of Technology |
Ritesh Agrawal ritesh1578@gmail.com Indian Space Research Organisation |
Adrian Borsa aborsa@ucsd.edu University of California, San Diego |
David Bekaert bekaertdavid@gmail.com Flemish Institute for Technological Research |
Jingyi Chen jingyi.ann.chen@utexas.edu University of Texas at Austin |
Heresh Fattahi heresh.fattahi@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology |
Marin Govorcin marin.govorcin@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology |
Emre Havazli Emre.havazli@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
M. C M Jasir jasirmckbl@gmail.com Indian Space Research Organisation, Ahmedabad, , India |
Jungkyo Jung Jungkyo.jung@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Diego A L Lobos dal344@cornell.edu Cornell University, Ithaca, New York, United States |
Rowena B Lohman rolohman@gmail.com Cornell University, Ithaca, New York, United States |
Franz J Meyer fjmeyer@alaska.edu University of Alaska Fairbanks, Fairbanks, Alaska, United States |
Matthew E Pritchard pritchard@cornell.edu Cornell University, Ithaca, New York, United States |
Paul A Rosen paul.a.rosen@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
K. M Sreejith sreejith@sac.isro.gov.in Indian Space Research Organisation, Ahmedabad, , India |
Ekaterina Tymofyeyeva katia.tymofyeyeva@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Howard Zebker zebker@ee.stanford.edu Stanford University, Palo Alto, California, United States |
NISAR Urgent Response Products for Earthquakes
Category
New Possibilities for InSAR in Earthquake Science: the NISAR Mission and OPERA Displacement Maps
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