{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,27]],"date-time":"2025-12-27T07:33:16Z","timestamp":1766820796888,"version":"build-2065373602"},"reference-count":63,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2021,12,17]],"date-time":"2021-12-17T00:00:00Z","timestamp":1639699200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41730102"],"award-info":[{"award-number":["41730102"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2017YFA0603104"],"award-info":[{"award-number":["2017YFA0603104"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["2042021kf1027"],"award-info":[{"award-number":["2042021kf1027"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The ice shelf is an important component of the Antarctic system, and the interaction between the ice sheet and the ocean often proceeds through mass variations of the ice shelf. The digital elevation model (DEM) of the ice shelf is particularly important for ice shelf elevation change and mass balance estimation. With the development of satellite altimetry technology, it became an important data source for DEM research of Antarctica. The National Aeronautics and Space Administration (NASA) Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) launched in 2018 is a significant improvement in along-track sampling rate and measurement accuracy compared with previous altimetry satellites. This study uses ordinary kriging interpolation to present new DEMs (ICESat-2 DEM hereinafter) for the three ice shelves (Ross, Filchner\u2013Ronne and Amery) in Antarctica with ICESat-2 altimetry data. Two variogram models (linear and spherical) of ordinary kriging interpolation are compared in this paper. The result shows that the spherical model generally shows better performance and lower standard deviation (STD) than the linear models. The precision of the ultimate DEM was evaluated by NASA Operation IceBridge (OIB) data and compared with five previously published Antarctic DEM products (REMA, TanDEM-X PolarDEM, Slater DEM, Helm DEM, and Bamber DEM). The comparison reveals that the mean difference between ICESat-2 DEM of the Ross ice shelf and OIB is \u22120.016 m with a STD of 0.918 m, and the mean difference between ICESat-2 DEM of the Filchner\u2013Ronne ice shelf and OIB is \u22120.533 m with a STD of 0.718 m. The three ICESat-2 DEMs show higher spatial resolution and elevation accuracy than five previously published Antarctic DEMs.<\/jats:p>","DOI":"10.3390\/rs13245137","type":"journal-article","created":{"date-parts":[[2021,12,20]],"date-time":"2021-12-20T02:40:32Z","timestamp":1639968032000},"page":"5137","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["DEM Generation with ICESat-2 Altimetry Data for the Three Antarctic Ice Shelves: Ross, Filchner\u2013Ronne and Amery"],"prefix":"10.3390","volume":"13","author":[{"given":"Tong","family":"Geng","sequence":"first","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7436-2504","authenticated-orcid":false,"given":"Shengkai","family":"Zhang","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3742-9380","authenticated-orcid":false,"given":"Feng","family":"Xiao","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]},{"given":"Jiaxing","family":"Li","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]},{"given":"Yue","family":"Xuan","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]},{"given":"Xiao","family":"Li","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]},{"given":"Fei","family":"Li","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1126\/science.1235798","article-title":"Ice-shelf melting around Antarctica","volume":"341","author":"Rignot","year":"2013","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1017\/S0032247400024268","article-title":"Measured properties of the Antarctic ice sheet derived from the SCAR Antarctic digital database","volume":"30","author":"Fox","year":"1994","journal-title":"Polar Rec."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1038\/nature12567","article-title":"Calving fluxes and basal melt rates of Antarctic ice shelves","volume":"502","author":"Depoorter","year":"2013","journal-title":"Nature"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Qi, M., Liu, Y., Lin, Y., Hui, F., Li, T., and Cheng, X. (2020). Efficient Location and Extraction of the Iceberg Calved Areas of the Antarctic Ice Shelves. Remote Sens., 12.","DOI":"10.3390\/rs12162658"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Wuite, J., Nagler, T., Gourmelen, N., Escorihuela, M.J., Hogg, A.E., and Drinkwater, M.R. (2019). Sub-Annual Calving Front Migration, Area Change and Calving Rates from Swath Mode CryoSat-2 Altimetry, on Filchner-Ronne Ice Shelf, Antarctica. Remote Sens., 11.","DOI":"10.3390\/rs11232761"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Rignot, E., Casassa, G., Gogineni, P., Krabill, W., Rivera, A., and Thomas, R. (2004). Accelerated ice discharge from the Antarctic Peninsula following the collapse of Larsen B ice shelf. Geophys. Res. Lett., 31.","DOI":"10.1029\/2004GL020697"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"695","DOI":"10.1038\/334695a0","article-title":"Observed velocity fluctuations on a major Antarctic ice stream","volume":"6184","author":"Stephenson","year":"1988","journal-title":"Nature"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1503","DOI":"10.1126\/science.1141111","article-title":"CLIMATE CHANGE: Why Is It Hard to Predict the Future of Ice Sheets?","volume":"315","author":"Vaughan","year":"2007","journal-title":"Science"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"101","DOI":"10.5194\/tc-3-101-2009","article-title":"A new 1km digital elevation model of the Antarctic derived from combined satellite radar and laser data\u2014Part 1: Data and methods","volume":"1","author":"Bamber","year":"2009","journal-title":"Cryosphere"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"499","DOI":"10.5194\/tc-7-499-2013","article-title":"A new bed elevation dataset for Greenland","volume":"7","author":"Bamber","year":"2013","journal-title":"Cryosphere"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"113","DOI":"10.5194\/tc-3-113-2009","article-title":"A new 1km digital elevation model of Antarctica derived from combined radar and laser data\u2014Part 2: Validation and error estimates","volume":"1","author":"Griggs","year":"2009","journal-title":"Cryosphere"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Wright, A.P., Siegert, M.J., Le Brocq, A.M., and Gore, D.B. (2008). High sensitivity of subglacial hydrological pathways in Antarctica to small ice-sheet changes. Geophys. Res. Lett., 35.","DOI":"10.1029\/2008GL034937"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Wang, Z., Song, X., Zhang, B., Liu, T., and Geng, H. (2020). Basal Channel Extraction and Variation Analysis of Nioghalvfjerdsfjorden Ice Shelf in Greenland. Remote Sens., 12.","DOI":"10.3390\/rs12091474"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Xing, Z., Chi, Z., Yang, Y., Chen, S., Huang, H., Cheng, X., and Hui, F. (2020). Accuracy Evaluation of Four Greenland Digital Elevation Models (DEMs) and Assessment of River Network Extraction. Remote Sens., 12.","DOI":"10.3390\/rs12203429"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Horgan, H.J., and Anandakrishnan, S. (2006). Static grounding lines and dynamic ice streams: Evidence from the Siple Coast, West Antarctica. Geophys. Res. Lett., 33.","DOI":"10.1029\/2006GL027091"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"327","DOI":"10.1126\/science.aaa0940","article-title":"2015 Volume loss from Antarctic ice shelves is accelerating","volume":"6232","author":"Paolo","year":"2015","journal-title":"Science"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1239","DOI":"10.1126\/science.aaz5845","article-title":"Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes","volume":"368","author":"Smith","year":"2020","journal-title":"Science"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"8421","DOI":"10.1002\/2014GL061940","article-title":"Mass loss of the Amundsen Sea Embayment of West Antarctica from four independent techniques","volume":"41","author":"Sutterley","year":"2015","journal-title":"Geophys. Res. Lett."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1038\/nature10114","article-title":"A dynamic early East Antarctic Ice Sheet suggested by ice-covered fjord landscapes","volume":"474","author":"Young","year":"2011","journal-title":"Nature"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"10898","DOI":"10.3390\/rs70810898","article-title":"Accurate Determination of Glacier Surface Velocity Fields with a DEM-Assisted Pixel-Tracking Technique from SAR Imagery","volume":"7","author":"Yan","year":"2015","journal-title":"Remote Sens."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"407","DOI":"10.5194\/tc-15-407-2021","article-title":"Observing traveling waves in glaciers with remote sensing: New flexible time series methods and application to Sermeq Kujalleq, Greenland","volume":"15","author":"Riel","year":"2021","journal-title":"Cryosphere"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Kim, S., and Kim, D. (2017). Combined usage of TanDEM-X and CryoSat-2 for generating a high resolution Digital Elevation Model of fast moving ice stream and its application in grounding line estimation. Remote Sens., 9.","DOI":"10.3390\/rs9020176"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"430","DOI":"10.3189\/S0260305500014427","article-title":"An improved elevation data set for climate and ice-sheet modeling: Validation with satellite imagery","volume":"25","author":"Bamber","year":"1997","journal-title":"Ann. Glaciol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1539","DOI":"10.5194\/tc-8-1539-2014","article-title":"Elevation and elevation change of Greenland and Antarctica derived from CryoSat-2","volume":"8","author":"Helm","year":"2014","journal-title":"Cryosphere"},{"key":"ref_25","first-page":"1617","article-title":"DEM development and precision analysis for Antarctic ice sheet using CryoSat-2 altimetry data","volume":"5","author":"Li","year":"2017","journal-title":"Chin. J. Geophys."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1551","DOI":"10.5194\/tc-12-1551-2018","article-title":"A new digital elevation model of Antarctica derived from CryoSat-2 altimetry","volume":"12","author":"Slater","year":"2018","journal-title":"Cryosphere"},{"key":"ref_27","unstructured":"DiMarzio, J., Brenner, A., Schutz, R.C., Shuman, A., and Zwally, H.J. (2007). GLAS\/ICESat 500 m Laser Altimetry Digital Elevation Model of Antarctica, Version 1."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1016\/j.isprsjprs.2017.08.008","article-title":"Generation and performance assessment of the global TanDEM-X digital elevation model","volume":"132","author":"Rizzoli","year":"2017","journal-title":"ISPRS J. Photogramm."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Abdullahi, S., Wessel, B., Huber, M., Wendleder, A., Roth, A., and Kuenzer, C. (2019). Estimating Penetration-Related X-Band InSAR Elevation Bias: A Study over the Greenland Ice Sheet. Remote Sens., 11.","DOI":"10.3390\/rs11242903"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"419","DOI":"10.3189\/2012JoG11J175","article-title":"Impact of resolution and radar penetration on glacier elevation changes computed from DEM differencing","volume":"58","author":"Gardelle","year":"2012","journal-title":"J. Glaciol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1226","DOI":"10.1016\/j.asr.2017.11.014","article-title":"CryoSat-2 swath interferometric altimetry for mapping ice elevation and elevation change","volume":"62","author":"Gourmelen","year":"2018","journal-title":"Adv. Space Res."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1016\/j.isprsjprs.2018.02.017","article-title":"Accuracy assessment of the global TanDEM-X Digital Elevation Model with GPS data","volume":"139","author":"Wessel","year":"2018","journal-title":"ISPRS J. Photogramm."},{"key":"ref_33","first-page":"3089","article-title":"Generation of high precision DEM from TerraSAR-X\/TanDEM-X","volume":"9","author":"Du","year":"2015","journal-title":"Chin. J. Geophys."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1047","DOI":"10.1109\/JSTARS.2015.2421879","article-title":"The TanDEM-X DEM Mosaicking: Fusion of Multiple Acquisitions Using InSAR Quality Parameters","volume":"9","author":"Gruber","year":"2016","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"665","DOI":"10.5194\/tc-13-665-2019","article-title":"The Reference Elevation Model of Antarctica","volume":"13","author":"Howat","year":"2019","journal-title":"Cryosphere"},{"key":"ref_36","unstructured":"Rao, Y.S., and Rao, K.S. (2003, January 1\u20135). Comparison of DEMs derived from INSAR and optical stereo techniques. Proceedings of the Third ESA International Workshop on ERS SAR Interferometry, Frascati, Italy. Available online: http:\/\/citeseerx.ist.psu.edu\/viewdoc\/download?doi=10.1.1.212.4788&rep=rep1&type=pdf."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1016\/j.rse.2016.12.029","article-title":"The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2): Science requirements, concept, and implementation","volume":"190","author":"Markus","year":"2017","journal-title":"Remote Sens. Environ."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"735","DOI":"10.1109\/JPROC.2009.2034765","article-title":"The ICESat-2 Laser Altimetry Mission","volume":"98","author":"Abdalati","year":"2010","journal-title":"Proc. IEEE"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"2556","DOI":"10.1080\/01431161.2020.1856962","article-title":"Evaluation of Ice, Cloud, And Land Elevation Satellite-2 (ICESat-2) land ice surface heights using Airborne Topographic Mapper (ATM) data in Antarctica","volume":"42","author":"Shen","year":"2021","journal-title":"Int. J. Remote Sens."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"553","DOI":"10.3189\/172756500781832639","article-title":"Digital elevation models for the Lambert Glacier\u2013Amery Ice Shelf system, East Antarctica, from ERS-1 satellite radar altimetry","volume":"46","author":"Fricker","year":"2000","journal-title":"J. Glaciol."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"485","DOI":"10.3189\/002214311796905659","article-title":"Antarctic ice-shelf thickness from satellite radar altimetry","volume":"57","author":"Griggs","year":"2011","journal-title":"J. Glaciol."},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Nguyen, A.T., and Herring, T.A. (2005). Analysis of ICESat data using Kalman filter and kriging to study height changes in East Antarctica. Geophys. Res. Lett., 32.","DOI":"10.1029\/2005GL024272"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"499","DOI":"10.1007\/s11004-019-09851-3","article-title":"How Different Analysis and Interpolation Methods Affect the Accuracy of Ice Surface Elevation Changes Inferred from Satellite Altimetry","volume":"52","author":"Horwath","year":"2020","journal-title":"Math. Geosci."},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Chen, C., and Li, Y.A. (2019). Fast Global Interpolation Method for Digital Terrain Model Generation from Large LiDAR-Derived Data. Remote Sens., 11.","DOI":"10.3390\/rs11111324"},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Koo, Y., Xie, H., Kurtz, N.T., Ackley, S.F., and Mestas-Nu\u00f1ez, A.M. (2021). Weekly Mapping of Sea Ice Freeboard in the Ross Sea from ICESat-2. Remote Sens., 13.","DOI":"10.3390\/rs13163277"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"108","DOI":"10.1016\/j.jmarsys.2016.07.002","article-title":"Processes influencing formation of low-salinity high-biomass lenses near the edge of the Ross Ice Shelf","volume":"166","author":"Li","year":"2017","journal-title":"J. Mar. Syst."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"9039","DOI":"10.1029\/2000JC000601","article-title":"How iceberg calving and grounding change the circulation and hydrography in the Filchner Ice Shelf-Ocean System","volume":"106","author":"Grosfeld","year":"2001","journal-title":"J. Geophys. Res. Ocean."},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Yu, J., Liu, H.X., Jezek, K.C., Warner, R.C., and Wen, J. (2010). Analysis of velocity field, mass balance, and basal melt of the Lambert Glacier\u2013Amery Ice Shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements. J. Geophys. Res., 115.","DOI":"10.1029\/2010JB007456"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"4214","DOI":"10.1016\/j.rse.2008.07.006","article-title":"The Landsat Image Mosaic of Antarctica","volume":"112","author":"Robert","year":"2008","journal-title":"Remote Sens. Environ."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Smith, B., Fricker, H.A., Holschuh, N., Gardnerd, A.S., Adusumillib, S., Brunte, K.M., Csathog, B., Harbecke, K., Hutha, A., and Neumanne, T. (2019). Land ice height-retrieval algorithm for NASA\u2019s ICESat-2 photon-counting laser altimeter. Remote Sens. Environ., 233.","DOI":"10.1016\/j.rse.2019.111352"},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Neumann, T.A., Martino, A.J., Markus, T., Bae, S., Bock, M.R., Brenner, A.C., Brunt, K.M., Cavanaugh, J., Fernandes, S.T., and Hancock, D.W. (2019). The Ice, Cloud, and Land Elevation Satellite\u20142 mission: A global geolocated photon product derived from the Advanced Topographic Laser Altimeter System. Remote Sens. Environ., 233.","DOI":"10.1016\/j.rse.2019.111325"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"13072","DOI":"10.1029\/2019GL084886","article-title":"Assessment of ICESat-2 Ice Sheet Surface Heights, Based on Comparisons over the Interior of the Antarctic Ice Sheet","volume":"46","author":"Brunt","year":"2019","journal-title":"Geophys. Res. Lett."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"3083","DOI":"10.5194\/tc-15-3083-2021","article-title":"Assessment of ICESat-2 ice surface elevations over the Chinese Antarctic Research Expedition (CHINARE) route, East Antarctica, based on coordinated multi-sensor observations","volume":"15","author":"Li","year":"2021","journal-title":"Cryosphere"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"1035","DOI":"10.5194\/tc-7-1035-2013","article-title":"Sea ice thickness, freeboard, and snow depth products from Operation IceBridge airborne data","volume":"7","author":"Kurtz","year":"2013","journal-title":"Cryosphere"},{"key":"ref_55","unstructured":"Martin, C.F., Krabill, W.B., Manizade, S.S., Russell, R.L., Sonntag, J.G., Swift, R.N., and Yungel, J.K. (2012). Airborne Topographic Mapper Calibration Procedures and Accuracy Assessment."},{"key":"ref_56","unstructured":"Studinger, M. (2014). IceBridge ATM L2 Icessn Elevation, Slope, and Roughness, Version 2."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"129","DOI":"10.5194\/essd-4-129-2012","article-title":"A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: Methods and accuracy assessment","volume":"4","author":"Cook","year":"2012","journal-title":"Earth Syst. Sci. Data"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1080\/02693799008941549","article-title":"Kriging: A method of interpolation for geographical information systems","volume":"4","author":"Oliver","year":"1990","journal-title":"Int. J. Geogr. Inf. Syst."},{"key":"ref_59","doi-asserted-by":"crossref","unstructured":"Oliver, M.A., and Webster, R. (2015). Basic Steps in Geostatistics: The Variogram and Kriging, Springer International Press.","DOI":"10.1007\/978-3-319-15865-5"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"516","DOI":"10.1016\/j.epsl.2005.06.008","article-title":"The accuracy of digital elevation models of the Antarctic continent","volume":"237","author":"Bamber","year":"2005","journal-title":"Earth Planet. Sci. Lett."},{"key":"ref_61","unstructured":"Ray, R.D. (1999). A Global Ocean Tide Model from TOPEX\/POSEIDON Altimetry: GOT99. 2. NASA Technical Memorandum 209478."},{"key":"ref_62","unstructured":"Neumann, T.A., Brenner, A., Hancock, D., Robbins, J., Saba, J., Harbeck, K., Gibbons, A., Lee, J., Luthcke, S.B., and Rebold, T. (2020, October 05). Algorithm Theoretical Basis Document (ATBD) for Global Geolocated Photons ATL03, Version 3, Release Date 1 April 2020. Available online: https:\/\/nsidc.org\/sites\/nsidc.org\/files\/technical-references\/ICESat2_ATL03_ATBD_r003.pdf."},{"key":"ref_63","unstructured":"Gerrish, L., Fretwell, P., and Cooper, P. (2020). High Resolution Vector Polylines of the Antarctic Coastline, UK Polar Data Centre, Natural Environment Research Council and UK Research and Innovation. Version 7.2."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/24\/5137\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:50:51Z","timestamp":1760169051000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/24\/5137"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,12,17]]},"references-count":63,"journal-issue":{"issue":"24","published-online":{"date-parts":[[2021,12]]}},"alternative-id":["rs13245137"],"URL":"https:\/\/doi.org\/10.3390\/rs13245137","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2021,12,17]]}}}