{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:43:15Z","timestamp":1760236995968,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,2,8]],"date-time":"2020-02-08T00:00:00Z","timestamp":1581120000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Hawaii regional climate model (HRCM), QuikSCAT, and ASCAT wind estimates are compared in the lee of Hawaii\u2019s Big Island with the goal of understanding ultrahigh resolution (UHR) scatterometer wind retrieval capabilities in this area, which includes a reverse-flow toward the island in the lee of the predominate flow. A comparison of scatterometer measured \u03c3 0 and model predicted \u03c3 0 suggests that scatterometers can detect the reverse flow in the lee of the island; however, neither QuikSCAT- nor ASCAT-estimated winds consistently report this flow. Furthermore, the scatterometer UHR winds do not resolve the wind direction features predicted by the HRCM. Differences between scatterometer measured \u03c3 0 and HRCM predicted \u03c3 0 indicate possible error in the placement of key reverse flow features predicted by the HRCM. We find that coarse initialization fields and a large size median filter windows used in ambiguity selection can impede the accuracy of the UHR wind direction retrieval in this area, suggesting the need for further development of improved near-coastal ambiguity selection algorithms.<\/jats:p>","DOI":"10.3390\/rs12030564","type":"journal-article","created":{"date-parts":[[2020,2,10]],"date-time":"2020-02-10T11:48:51Z","timestamp":1581335331000},"page":"564","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Ultrahigh Resolution Scatterometer Winds near Hawaii"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6927-4788","authenticated-orcid":false,"given":"Nolan","family":"Hutchings","sequence":"first","affiliation":[{"name":"Department of Electrical &amp; Computer Engineering, Brigham Young University, 450 EB, Provo, UT 84602, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Kilpatrick","sequence":"additional","affiliation":[{"name":"Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Dr MC 0206, La Jolla, CA 92093, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1852-3972","authenticated-orcid":false,"given":"David G.","family":"Long","sequence":"additional","affiliation":[{"name":"Department of Electrical &amp; Computer Engineering, Brigham Young University, 450 EB, Provo, UT 84602, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,2,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Ulaby, F.T., and Long, D.G. (2014). Microwave Radar and Radiometric Remote Sensing, The University of Michigan Press.","DOI":"10.3998\/0472119356"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2307","DOI":"10.1109\/JSTARS.2016.2629418","article-title":"Polar Applications of Spaceborne Scatterometers","volume":"10","author":"Long","year":"2017","journal-title":"IEEE J. Sel. Top. Appl. Earth Observ."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"972","DOI":"10.1109\/LGRS.2016.2557321","article-title":"High-Resolution Soil Moisture Retrieval with ASCAT","volume":"13","author":"Lindell","year":"2016","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Lindell, D., and Long, D. (2016). Multiyear Arctic ice classification using ASCAT and SSMIS. Remote Sens., 8.","DOI":"10.3390\/rs8040294"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"194","DOI":"10.5670\/oceanog.2009.49","article-title":"Operational use and impact of satellite remotely sensed ocean surface vector winds in the marine warning and forecasting environment","volume":"22","author":"Chang","year":"2009","journal-title":"Oceanography"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2165","DOI":"10.1109\/JSTARS.2016.2643641","article-title":"Evaluating and extending the ocean wind climate data record","volume":"10","author":"Wentz","year":"2017","journal-title":"IEEE J. Sel. Top. Appl. Earth Observ."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"839","DOI":"10.1109\/TGRS.2008.2005633","article-title":"Land Contamination Compensation for QuikSCAT Near-Coastal Wind Retrieval","volume":"47","author":"Owen","year":"2009","journal-title":"IEEE Trans. Geoscie. Remote Sens."},{"key":"ref_8","unstructured":"Physical Oceanography Distributed Active Archive Center (PO.DAAC) (2006). Seawind\u2019s User Guide, Physical Oceanography Distributed Active Archive Center. Rev. 3.0."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Hersbach, H., Stoffelen, A., and de Haan, S. (2007). An improved C-band scatterometer ocean geophysical model function: CMOD5. J. Geophys. Res. Oceans, 112.","DOI":"10.1029\/2006JC003743"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"850","DOI":"10.1109\/5.90163","article-title":"Spaceborne radar measurement of wind velocity over the ocean-an overview of the NSCAT scatterometer system","volume":"79","author":"Naderi","year":"1991","journal-title":"Proc. IEEE"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1109\/36.103307","article-title":"A median-filter-based ambiguity removal algorithm for NSCAT","volume":"29","author":"Shaffer","year":"1991","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"5291","DOI":"10.1029\/JC095iC04p05291","article-title":"A circular median filter approach for resolving directional ambiguities in wind fields retrieved from spaceborne scatterometer data","volume":"95","author":"Schultz","year":"1990","journal-title":"J. Geophys. Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2057","DOI":"10.1126\/science.1059781","article-title":"Far-reaching effects of the Hawaiian islands on the Pacific Ocean-atmosphere system","volume":"292","author":"Xie","year":"2001","journal-title":"Science"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Sakamoto, T.T., Sumi, A., Emori, S., Nishimura, T., Hasumi, H., Suzuki, T., and Kimoto, M. (2004). Far-reaching effects of the Hawaiian Islands in the CCSR\/NIES\/FRCGC high-resolution climate model. Geophys. Res. Lett., 12.","DOI":"10.1029\/2004GL020907"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1900","DOI":"10.1029\/2019EA000757","article-title":"Systematic scatterometer wind errors near coastal mountains","volume":"6","author":"Kilpatrick","year":"2019","journal-title":"Earth Space Sci."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"868","DOI":"10.1175\/1520-0450(1981)020<0868:OTEOAV>2.0.CO;2","article-title":"On the existence of atmospheric vortices downwind of Hawaii during the HAMEC project","volume":"20","author":"Nickerson","year":"1981","journal-title":"J. Appl. Meteorol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3728","DOI":"10.1175\/1520-0469(1993)050<3728:AOOHW>2.0.CO;2","article-title":"Aerial observations of Hawaii\u2019s wake","volume":"50","author":"Smith","year":"1993","journal-title":"J. Atmos. Sci."},{"key":"ref_18","unstructured":"Patzert, W.C. (1969). Eddies in Hawaiian Waters, Hawaii Inst of Geophysics. Technical report."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"3259","DOI":"10.1175\/MWR-D-11-00260.1","article-title":"Configuration and evaluation of the WRF model for the study of Hawaiian regional climate","volume":"140","author":"Zhang","year":"2012","journal-title":"Mon. Weather Rev."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Yang, J., and Zhang, J. (2018). Evaluation of ISS-RapidScat wind vectors using buoys and ASCAT data. Remote Sens., 10.","DOI":"10.3390\/rs10040648"},{"key":"ref_21","unstructured":"(2020, January 30). Asia-Pacific Data Research Center. Available online: http:\/\/apdrc.soest.hawaii.edu\/."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"3027","DOI":"10.1175\/JCLI-D-15-0432.1","article-title":"Dynamical downscaling of the climate for the Hawaiian Islands. Part I: Present day","volume":"29","author":"Zhang","year":"2016","journal-title":"J. Clim."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2589","DOI":"10.1109\/TGRS.2015.2503762","article-title":"Enhanced-Resolution Reconstruction of ASCAT Backscatter Measurements","volume":"54","author":"Lindsley","year":"2016","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1850","DOI":"10.1109\/TGRS.2010.2100402","article-title":"A reconstruction approach to scatterometer wind vector field retrieval","volume":"49","author":"Williams","year":"2011","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"413","DOI":"10.1109\/LGRS.2009.2014852","article-title":"Coastal validation of ultra-high resolution wind vector retrieval from QuikSCAT in the Gulf of Maine","volume":"6","author":"Plagge","year":"2009","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Williams, B.A., Owen, M.P., and Long, D.G. (2009, January 4\u20138). The ultra high resolution QuikSCAT product. Proceedings of the 2009 IEEE Radar Conference, Pasadena, CA, USA.","DOI":"10.1109\/RADAR.2009.4977111"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"2924","DOI":"10.1109\/TGRS.2008.924096","article-title":"Estimation of Hurricane Winds from SeaWinds at Ultra High Resolution","volume":"46","author":"Williams","year":"2008","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1865","DOI":"10.1109\/TGRS.2010.2102361","article-title":"Simultaneous Wind and Rain Estimation for QuikSCAT at Ultra-High Resolution","volume":"49","author":"Owen","year":"2011","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1555","DOI":"10.1109\/TGRS.2012.2207904","article-title":"Prior Selection for QuikSCAT Ultra-High Resolution Wind and Rain Retrieval","volume":"51","author":"Owen","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"3370","DOI":"10.1109\/TGRS.2018.2884128","article-title":"Improved Ultrahigh-Resolution Wind Retrieval for RapidScat","volume":"57","author":"Hutchings","year":"2018","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"5699","DOI":"10.1109\/TGRS.2016.2570245","article-title":"Analysis and Validation of High-Resolution Wind from ASCAT","volume":"54","author":"Lindsley","year":"2016","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_32","unstructured":"Lindsley, R.D. (2015). Enhanced-Resolution Processing and Applications of the ASCAT Scatterometer. [Ph.D. Thesis, Brigham Young University]."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"11232","DOI":"10.1029\/1998JC900091","article-title":"The accuracy of the NSCAT 1 vector winds: Comparisons with National Data Buoy Center buoys","volume":"104","author":"Freilich","year":"1999","journal-title":"J. Geophys. Res."},{"key":"ref_34","unstructured":"Liu, W.T., and Tang, W. (1996). Equivalent Neutral Wind, Jet Propulsion Laboratory Publication."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/3\/564\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T08:55:54Z","timestamp":1760172954000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/3\/564"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,2,8]]},"references-count":34,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2020,2]]}},"alternative-id":["rs12030564"],"URL":"https:\/\/doi.org\/10.3390\/rs12030564","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2020,2,8]]}}}