SAR interferometry using ALOS-2 PALSAR-2 data for the Mw 7.8 Gorkha, Nepal earthquake
The Advanced Land Observing Satellite-2 (ALOS-2, “DAICHI-2”) has been observing Nepal with the Phased Array type L-band Synthetic Aperture Radar-2 (PALSAR-2) in response to an emergency request from Sentinel Asia related to the Mw 7.8 Gorkha earthquake on April 25, 2015. PALSAR-2 successfully detect...
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| description | The Advanced Land Observing Satellite-2 (ALOS-2, “DAICHI-2”) has been observing Nepal with the Phased Array type L-band Synthetic Aperture Radar-2 (PALSAR-2) in response to an emergency request from Sentinel Asia related to the Mw 7.8 Gorkha earthquake on April 25, 2015. PALSAR-2 successfully detected not only avalanches and local crustal displacements but also continental-scale deformation. Especially, by the use of the ScanSAR mode, we are able to make interferograms that cover the entire displacement area of the earthquake. However, we did encounter some fundamental problems with the ScanSAR and incorrect settings of PALSAR-2 operation that have now been fixed. They include (1) burst overlap misalignment between two ScanSAR observations, which limits the number of pairs available and the quality of the interferogram, (2) non-crustal fringes which are derived from co-registration error and/or ionospheric effect and, (3) incorrect setting of the center frequency in the Stripmap beam F2-6. In this paper, we describe their problems and solutions. The number of interferometric pairs are limited by (1) and (3). The accuracy of the interferograms are limited by (2) and (3). The experimental results showed that current solutions for (2) and (3) work appropriately. |
| doi_str_mv | 10.1186/s40623-016-0394-4 |
| format | Article |
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PALSAR-2 successfully detected not only avalanches and local crustal displacements but also continental-scale deformation. Especially, by the use of the ScanSAR mode, we are able to make interferograms that cover the entire displacement area of the earthquake. However, we did encounter some fundamental problems with the ScanSAR and incorrect settings of PALSAR-2 operation that have now been fixed. They include (1) burst overlap misalignment between two ScanSAR observations, which limits the number of pairs available and the quality of the interferogram, (2) non-crustal fringes which are derived from co-registration error and/or ionospheric effect and, (3) incorrect setting of the center frequency in the Stripmap beam F2-6. In this paper, we describe their problems and solutions. The number of interferometric pairs are limited by (1) and (3). The accuracy of the interferograms are limited by (2) and (3). 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The experimental results showed that current solutions for (2) and (3) work appropriately.</description><subject>4. Seismology</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Earthquake and Himalayan Studies: First Results</subject><subject>Geology</subject><subject>Geophysics/Geodesy</subject><subject>Nepal</subject><subject>The 2015 Gorkha</subject><issn>1880-5981</issn><issn>1880-5981</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>BENPR</sourceid><recordid>eNp1kD1PwzAQhi0EEqXwA9gsseJyZzupM0YVFKRAEaWz5aZ2v5PWToT670kUhi5Md8Pzvnd6CLlHGCCq-ClIiLlggDEDkUgmL0gPlQIWJQovz_ZrchPCBkCAjEWPzKbpF10XlfXO-nJvK3-idVgXS5pmkynj9DPNGqRZFqYy1JWeVitL33_ocKDouPTblXmkH_ZgdtQaX62OtdnaW3LlzC7Yu7_ZJ7OX5-_RK8sm47dRmjETybhiCLCwgDLibiGdSZofE2WVE0qoWCrrIAGcqyhCYRTkQnFEnufJPIc4EgJFnzx0vQdfHmsbKr0pa180JzUOh4IrLoRsKOyo3JcheOv0wa_3xp80gm7t6c6ebuzp1p5uM7zLhIYtltafNf8b-gXc6W2I</recordid><startdate>20160201</startdate><enddate>20160201</enddate><creator>Natsuaki, Ryo</creator><creator>Nagai, Hiroto</creator><creator>Motohka, Takeshi</creator><creator>Ohki, Masato</creator><creator>Watanabe, Manabu</creator><creator>Thapa, Rajesh B.</creator><creator>Tadono, Takeo</creator><creator>Shimada, Masanobu</creator><creator>Suzuki, Shinichi</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L7M</scope><scope>P5Z</scope><scope>P62</scope><scope>PCBAR</scope><scope>PHGZM</scope><scope>PHGZT</scope><scope>PIMPY</scope><scope>PKEHL</scope><scope>PQEST</scope><scope>PQGLB</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20160201</creationdate><title>SAR interferometry using ALOS-2 PALSAR-2 data for the Mw 7.8 Gorkha, Nepal earthquake</title><author>Natsuaki, Ryo ; Nagai, Hiroto ; Motohka, Takeshi ; Ohki, Masato ; Watanabe, Manabu ; Thapa, Rajesh B. ; Tadono, Takeo ; Shimada, Masanobu ; Suzuki, Shinichi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a546t-100de01452fd4fa988098e8f3838648ef0901b85513a80c382112cc9bc0653313</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>4. Seismology</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Earthquake and Himalayan Studies: First Results</topic><topic>Geology</topic><topic>Geophysics/Geodesy</topic><topic>Nepal</topic><topic>The 2015 Gorkha</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Natsuaki, Ryo</creatorcontrib><creatorcontrib>Nagai, Hiroto</creatorcontrib><creatorcontrib>Motohka, Takeshi</creatorcontrib><creatorcontrib>Ohki, Masato</creatorcontrib><creatorcontrib>Watanabe, Manabu</creatorcontrib><creatorcontrib>Thapa, Rajesh B.</creatorcontrib><creatorcontrib>Tadono, Takeo</creatorcontrib><creatorcontrib>Shimada, Masanobu</creatorcontrib><creatorcontrib>Suzuki, Shinichi</creatorcontrib><collection>Springer Nature OA/Free Journals</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest Central (New)</collection><collection>ProQuest One Academic (New)</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Middle East (New)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Applied & Life Sciences</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Earth, planets, and space</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Natsuaki, Ryo</au><au>Nagai, Hiroto</au><au>Motohka, Takeshi</au><au>Ohki, Masato</au><au>Watanabe, Manabu</au><au>Thapa, Rajesh B.</au><au>Tadono, Takeo</au><au>Shimada, Masanobu</au><au>Suzuki, Shinichi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SAR interferometry using ALOS-2 PALSAR-2 data for the Mw 7.8 Gorkha, Nepal earthquake</atitle><jtitle>Earth, planets, and space</jtitle><stitle>Earth Planets Space</stitle><date>2016-02-01</date><risdate>2016</risdate><volume>68</volume><issue>1</issue><spage>1</spage><pages>1-</pages><artnum>15</artnum><issn>1880-5981</issn><eissn>1880-5981</eissn><abstract>The Advanced Land Observing Satellite-2 (ALOS-2, “DAICHI-2”) has been observing Nepal with the Phased Array type L-band Synthetic Aperture Radar-2 (PALSAR-2) in response to an emergency request from Sentinel Asia related to the Mw 7.8 Gorkha earthquake on April 25, 2015. PALSAR-2 successfully detected not only avalanches and local crustal displacements but also continental-scale deformation. Especially, by the use of the ScanSAR mode, we are able to make interferograms that cover the entire displacement area of the earthquake. However, we did encounter some fundamental problems with the ScanSAR and incorrect settings of PALSAR-2 operation that have now been fixed. They include (1) burst overlap misalignment between two ScanSAR observations, which limits the number of pairs available and the quality of the interferogram, (2) non-crustal fringes which are derived from co-registration error and/or ionospheric effect and, (3) incorrect setting of the center frequency in the Stripmap beam F2-6. In this paper, we describe their problems and solutions. The number of interferometric pairs are limited by (1) and (3). The accuracy of the interferograms are limited by (2) and (3). The experimental results showed that current solutions for (2) and (3) work appropriately.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1186/s40623-016-0394-4</doi><oa>free_for_read</oa></addata></record> |
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| subjects | 4. Seismology Earth and Environmental Science Earth Sciences Earthquake and Himalayan Studies: First Results Geology Geophysics/Geodesy Nepal The 2015 Gorkha |
| title | SAR interferometry using ALOS-2 PALSAR-2 data for the Mw 7.8 Gorkha, Nepal earthquake |
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