研究目的
To determine the variability in ground reflectance measurements due to the operator and the method of collection, and to compare these methods for their suitability for vicarious calibration of satellite data.
研究成果
The study highlighted the variability in ground reflectance measurements due to different collection methods and operators. It suggested further research to compare measurements from different teams and methods, and to compare field data with satellite data for cross-calibration purposes.
研究不足
The study was limited to the Railroad Valley Playa site and used only two field spectroradiometers. The variability due to operator and method was the focus, with potential for further optimization in method selection and equipment use.
1：Experimental Design and Method Selection:
The study compared continuous sampling and stop and measure methods for acquiring ground reflectance.
2：Sample Selection and Data Sources:
Data was collected at the Railroad Valley Playa calibration site in Nevada, USA.
3：List of Experimental Equipment and Materials:
Two field portable spectroradiometers and two 500 mm sintered polytetrafluoroethylene (PTFE) reference panels were used.
4：Experimental Procedures and Operational Workflow:
Measurements were performed along an 80 m east-west transect and a series of north-south transects over an 80 x 320 m area.
5：Data Analysis Methods:
The study analyzed the standard deviation of the spectra and compared the reflectance measurements.
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