A Review of Retrieving in Sun-Induced Chlorophyll Fluorescence

In this paper, the fluorescence retrieval methods from multiple scales, ranging from near the ground to the use of spaceborne sensors, are analyzed and summarized in detail. The advantages and disadvantages of different sun-induced chlorophyll fluorescence retrieval methods are compared, and the key issues of the current sun-induced chlorophyll fluorescence retrieval algorithms are discussed. Finally, suggested solutions and key problems are proposed for future research.