In situ-based spectral characteristics of first-year landfast ice in eastern Liaodong Bay, Bohai sea - Qingkang Hou; Yu Yan; Zhikun Lin; Chenchen Yao; Jiayu Ding; Jinghan Xu; Chenyu Shu; Lei Ren; Yingjun Xu (International Journal of Remote Sensing, 2026)