Abstract:

【Objective】 The objective of this study was to verify the feasibility of pushbroom imaging spectrometer（PIS）in the field. 【Method】 Spectral information of wheat leaves in the key growth periods was collected by PIS and ASD Fieldspec-FR2500 (ASD); Meanwhile, the chlorophyll contents of wheat leaves were tested in the lab. A total 15 vegetation indices were calculated by using two instruments’ data which were spectral values from 450 nm to 850 nm. Then correlation coefficients between the same vegetation indices and chlorophyll contents for two applications were analyzed and compared. 【Result】 The results showed that there were same spectrum curve trends of leaf reflectance between PIS and ASD, including the same reflectance peak, valley and high reflectance platform. However, the PIS reflectance data were higher than the ASD data in whole range. Compared with ASD spectrum parameters, PIS got higher correlation coefficients between 15 vegetation indices and chlorophyll contents. 【Conclusion】 It is concluded that PIS spectral data are reliable, and PIS has an important application potential in the near ground remote sensing for it’s advantage of combination image with spectrum.

Key words: pushbroom imaging spectrometer, hyperspectral, vegetation indices, winter wheat