{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,2,6]],"date-time":"2024-02-06T19:06:21Z","timestamp":1707246381461},"reference-count":33,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2023,5,27]],"date-time":"2023-05-27T00:00:00Z","timestamp":1685145600000},"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":["41901400"],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Scientific Research Fund of Hunan Provincial Education Department","award":["2023JJ30233"]},{"name":"Education Department Science Project of Hunan Province","award":["20C0800"]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"The geometrical measurement precision of laser spots is affected by the deviation between the parameters of the laser altimeter and the laboratory measurement results, and the inversion accuracy of surface object height is also limited. The measurement parameters and the load state can be obtained by calibration of the laser altimeter system. Usually, ground detectors are deployed to calibrate the measurement parameters of the laser altimeter, including the divergence angle and the energy distribution of the laser beam. A calibration method for a laser footprint spot without a calibration field was proposed in this paper, focused on the airborne large-footprint laser altimeter system. The geometric parameters of the laser spot were calibrated through the laser echo waveforms of a specific terrain. The experimental results show that geometric calibration of the large-footprint laser altimeter can be achieved in the area of the step surface. The divergence angle of the laser beams obtained from the six experimental areas is 4.604 \u00b1 0.359 mRad, and the consistency of the energy distribution from each laser spot reaches 92.67%. A new method of on-orbit calibration and verification is provided for the satellite laser altimeter system.<\/jats:p>","DOI":"10.3390\/rs15112789","type":"journal-article","created":{"date-parts":[[2023,5,27]],"date-time":"2023-05-27T20:17:33Z","timestamp":1685218653000},"page":"2789","source":"Crossref","is-referenced-by-count":1,"title":["A Calibration Method for Large-Footprint Full-Waveform Airborne Laser Altimeter without a Calibration Field"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"http:\/\/orcid.org\/0000-0001-7002-9480","authenticated-orcid":false,"given":"Shaoning","family":"Li","sequence":"first","affiliation":[{"name":"National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China"},{"name":"School of Earth Sciences and Geospatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China"}]},{"ORCID":"http:\/\/orcid.org\/0000-0001-5835-8142","authenticated-orcid":false,"given":"Qifan","family":"Yu","sequence":"additional","affiliation":[{"name":"National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China"},{"name":"School of Earth Sciences and Geospatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China"}]},{"given":"Anmin","family":"Fu","sequence":"additional","affiliation":[{"name":"Academy of Inventory and Planning, National Forestry and Grassland Administration, Beijing 100714, China"}]},{"ORCID":"http:\/\/orcid.org\/0000-0002-3987-5336","authenticated-orcid":false,"given":"Guo","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,5,27]]},"reference":[{"key":"ref_1","first-page":"226","article-title":"Using ICESAT altimeter data to determine the Antarctic ice sheet elevation model","volume":"33","author":"Li","year":"2008","journal-title":"Geomat. 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