AUTHOR=Lyapustin Alexei , Wang Yujie , Korkin Sergey , Schaaf Crystal , Wang Weile , Wang Zhuosen TITLE=Scaled RTLS BRDF model extended to high zenith angles JOURNAL=Frontiers in Remote Sensing VOLUME=6 YEAR=2025 URL=https://www.frontiersin.org/journals/remote-sensing/articles/10.3389/frsen.2025.1533803 DOI=10.3389/frsen.2025.1533803 ISSN=2673-6187