{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:14:08Z","timestamp":1760235248030,"version":"build-2065373602"},"reference-count":36,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T00:00:00Z","timestamp":1627776000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science of Foundation","award":["41701425"],"award-info":[{"award-number":["41701425"]}]},{"name":"Major Projects of High-resolution Earth Observation System","award":["04-Y30B01-9001-18\/20"],"award-info":[{"award-number":["04-Y30B01-9001-18\/20"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>In this paper, a self-made, mineral, multi-angle, spectrum measurement device is employed to measure the multi-angle spectra of olivine and plagioclase; the multi-angle spectra of ilmenite in the Reflectance Experiment Laboratory (RELAB) Spectral Library are collected; and the optimized retrieval of the photometric parameters of the Hapke model is realized. Importantly, the derived result of the single-scattering albedo (SSA) is stable and has both mathematical meaning and physical meaning. The derived Legendre polynomial coefficients of the phase function can better simulate the variation in the mineral spectra with angle. This paper compares the effects of multi-angle and single-angle spectral data on the photometric parameter derived results. The setting of the Legendre polynomial coefficient of the scattering phase function mainly affects the simulation accuracy of the mineral spectra as a function of angle. Using this coefficient to optimize the retrieval, the simulation accuracy is moderately improved compared with the single-angle simulation. The estimation of photometric parameters based on multi-angle spectral data can provide a basis for setting the empirical values of the phase function parameters from single-angle spectral calculations, which can more truly reflect the law of reflectance spectra changing with angle than Lucey\u2019s traditional empirical value of the phase function (b = \u22120.4 and c = 0.25). The results of multi-angle spectra retrieval in this paper show that the Legendre polynomial coefficients of the phase function vary with wavelength rather than being constant and that different minerals differ greatly.<\/jats:p>","DOI":"10.3390\/rs13153022","type":"journal-article","created":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T21:44:32Z","timestamp":1627854272000},"page":"3022","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Retrieval of Photometric Parameters of Minerals Using a Self-Made Multi-Angle Spectrometer Based on the Hapke Radiative Transfer Model"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2120-434X","authenticated-orcid":false,"given":"Ping","family":"Zhou","sequence":"first","affiliation":[{"name":"School of Geosciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China"}]},{"given":"Zhe","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Geosciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China"},{"name":"Hebei Bureau of Coal Geological Exploration, Shijiazhuang 050085, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5843-3106","authenticated-orcid":false,"given":"Hong-Yuan","family":"Huo","sequence":"additional","affiliation":[{"name":"Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China"}]},{"given":"Zhansheng","family":"Liu","sequence":"additional","affiliation":[{"name":"Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Shirmard, H., Farahbakhsh, E., Pour, A.B., Muslim, A.M., M\u00fcller, R.D., and Chandra, R. 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