{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T16:29:34Z","timestamp":1764174574955,"version":"build-2065373602"},"reference-count":24,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2019,1,11]],"date-time":"2019-01-11T00:00:00Z","timestamp":1547164800000},"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>In this paper, we investigate the potential of polarimetric Synthetic Aperture Radar (SAR) tomography (Pol-TomoSAR) in urban applications. TomoSAR exploits the amplitude and phase of the received data and offers the possibility to resolve multiple scatters lying in the same range\u2013azimuth resolution cell. In urban environments, this issue is very important since layover causes multiple coherent scatterers to be mapped in the same range\u2013azimuth image pixel. To achieve reliable and accurate results, TomoSAR requires a large number of multi-baseline acquisitions which, for satellite-borne SAR systems, are collected with long time intervals. Then, accurate tomographic reconstructions would require multiple scatterers to remain stable between all the acquisitions. In this paper, an extension of a generalized likelihood ratio test (GLRT)-based tomographic approach, denoted as Fast-Sup-GLRT, to the polarimetric data case is introduced, with the purpose of investigating if, in urban applications, the use of polarimetric channels allows for reduction of the number of baselines required to achieve a given scatterer\u2019s detection performance. The results presented show that the use of dual polarization data allows the proposed detector to work in an equivalent or better way than use of a double number of independent single polarization channels.<\/jats:p>","DOI":"10.3390\/rs11020132","type":"journal-article","created":{"date-parts":[[2019,1,11]],"date-time":"2019-01-11T11:36:42Z","timestamp":1547206602000},"page":"132","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Urban Tomographic Imaging Using Polarimetric SAR Data"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6551-7834","authenticated-orcid":false,"given":"Alessandra","family":"Budillon","sequence":"first","affiliation":[{"name":"Dipartimento di Ingegneria, Universit\u00e0 Degli Studi di Napoli \u201cParthenope\u201d, 80133 Napoli NA, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Angel Caroline","family":"Johnsy","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria, Universit\u00e0 Degli Studi di Napoli \u201cParthenope\u201d, 80133 Napoli NA, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9656-2969","authenticated-orcid":false,"given":"Gilda","family":"Schirinzi","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria, Universit\u00e0 Degli Studi di Napoli \u201cParthenope\u201d, 80133 Napoli NA, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2754","DOI":"10.1109\/JSTARS.2014.2317287","article-title":"The COSMOSkyMed dual use earth observation program: Development, qualification, and results of the commissioning of the overall constellation","volume":"7","author":"Caltagirone","year":"2014","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Porfilio, M., Serva, S., Fiorentino, C., and Calabrese, D. (2016, January 10\u201315). The acquisition modes of COSMO-Skymed di Seconda Generazione: A new combined approach based on SAR and platform agility. Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Beijing, China.","DOI":"10.1109\/IGARSS.2016.7729537"},{"key":"ref_3","unstructured":"Lee, J.-S., and Pottier, E. (2009). Polarimetric Radar Imaging: From Basics to Applications, CRC Press."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"5520","DOI":"10.1109\/TGRS.2016.2567421","article-title":"The impacts of building orientation on polarimetric orientation angle estimation and model-based decomposition for multilook polarimetric SAR data in Urban areas","volume":"54","author":"Li","year":"2016","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"3039","DOI":"10.1109\/TGRS.2013.2268853","article-title":"Double-bounce component in cross-polarimetric SAR from a new scattering target decomposition","volume":"52","author":"Hong","year":"2014","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1344","DOI":"10.1109\/TAES.2002.1145755","article-title":"Layover solution in multibaseline SAR interferometry","volume":"38","author":"Gini","year":"2002","journal-title":"IEEE Trans. Aerosp. Electron. Syst."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2142","DOI":"10.1109\/36.868873","article-title":"First Demonstration of Airborne SAR Tomography Using Multibaseline L-band Data","volume":"38","author":"Reigber","year":"2000","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1109\/MSP.2014.2312073","article-title":"Tomographic processing of interferometric SAR data: Developments, applications, and future research perspectives","volume":"31","author":"Fornaro","year":"2014","journal-title":"IEEE Signal Process. Mag."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2902","DOI":"10.1109\/JSTARS.2014.2344916","article-title":"Localization Performance of Multiple Scatterers in Compressive Sampling SAR Tomography: Results on COSMO-SkyMed Data","volume":"7","author":"Budillon","year":"2014","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1109\/MSP.2014.2312098","article-title":"Superresolving SAR Tomography for Multidimensional Imaging of Urban Areas: Compressive sensing-based TomoSAR inversion","volume":"31","author":"Zhu","year":"2014","journal-title":"IEEE Signal Process. Mag."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Liang, L., Li, X., Ferro-Famil, L., Guo, H., Zhang, L., and Wu, W. (2018). Urban Area Tomography Using a Sparse Representation Based Two-Dimensional Spectral Analysis Technique. Remote Sens., 10.","DOI":"10.3390\/rs10010109"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1207","DOI":"10.1002\/cpa.20124","article-title":"Stable signal recovery from incomplete and inaccurate measurements","volume":"59","author":"Candes","year":"2006","journal-title":"Commun. Pure Appl. Math."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3567","DOI":"10.1109\/TGRS.2012.2183002","article-title":"Detection of Double Scatterers in SAR Tomography","volume":"50","author":"Pauciullo","year":"2012","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1086","DOI":"10.1109\/JSTARS.2015.2494376","article-title":"GLRT Based on Support Estimation for Multiple Scatterers Detection in SAR Tomography","volume":"9","author":"Budillon","year":"2016","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2768","DOI":"10.1109\/JSTARS.2017.2657227","article-title":"A Fast Support Detector for Super-Resolution Localization of Multiple Scatterers in SAR Tomography","volume":"10","author":"Budillon","year":"2017","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Budillon, A., Johnsy, A., and Schirinzi, G. (2017). Extension of a fast GLRT algorithm to 5D SAR tomography of Urban areas. Remote Sens., 9.","DOI":"10.3390\/rs9080844"},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Siddique, M.A., Wegm\u00fcller, U., Hajnsek, I., and Frey, O. (2018). SAR Tomography as an Add-On to PSI: Detection of Coherent Scatterers in the Presence of Phase Instabilities. Remote Sens., 10.","DOI":"10.3390\/rs10071014"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2375","DOI":"10.1109\/TGRS.2009.2037748","article-title":"Single and multipolarimetric SAR tomography of forested areas: A parametric approach","volume":"48","author":"Tebaldini","year":"2010","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"3648","DOI":"10.1109\/TGRS.2011.2125972","article-title":"Analyzing tomographic SAR data of a forest with respect to frequency, polarization, and focusing technique","volume":"49","author":"Frey","year":"2011","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"232","DOI":"10.1109\/TGRS.2011.2159614","article-title":"Multibaseline polarimetric SAR tomography of a boreal forest at P- and L-bands","volume":"50","author":"Tebaldini","year":"2012","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1860","DOI":"10.1109\/LGRS.2017.2738672","article-title":"On the estimation of ground and volume polarimetric covariances in forest scenarios with SAR tomography","volume":"14","author":"Pardini","year":"2017","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"4616","DOI":"10.1109\/TGRS.2011.2147321","article-title":"Three Dimensional Imaging and Scattering Mechanism Estimation over Urban Scenes Using Dual-Baseline Polarimetric InSAR Observations at L-Band","volume":"49","author":"Sauer","year":"2011","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"871","DOI":"10.1109\/LGRS.2012.2185482","article-title":"Multisignal Compressed Sensing for Polarimetric SAR Tomography","volume":"9","author":"Aguilera","year":"2012","journal-title":"Geosci. Remote Sens. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"3350","DOI":"10.1109\/TGRS.2014.2374422","article-title":"Performance Evaluation of a GLRT Moving Target Detector for TerraSAR-X along-track interferometric data","volume":"53","author":"Budillon","year":"2015","journal-title":"IEEE Trans. Geosci. Remote Sens."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/11\/2\/132\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:25:20Z","timestamp":1760185520000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/11\/2\/132"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,1,11]]},"references-count":24,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2019,1]]}},"alternative-id":["rs11020132"],"URL":"https:\/\/doi.org\/10.3390\/rs11020132","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2019,1,11]]}}}