Surface Reflectance and Sun-Induced Fluorescence Spectroscopy Measurements Using a Small Hyperspectral UAS
Abstract
:1. Introduction
2. The HyUAS System
2.1. UAS Platform
2.2. Hyperspectral and RGB Sensors
2.3. Mission Planning and Data Collection
3. Material and Methods
3.1. Data Processing
3.1.1. 3D Surface Model and Geo-Location of Spectra
3.1.2. Retrieval of Surface Reflectance and Fluorescence
3.2. Laboratory Characterization and Calibration
3.3. Flight Campaign
4. Results and Discussions
4.1. Geometric, Radiometric and Spectral Characterization
4.2. Analysis of the Retrieved Reflectance and Fluorescence
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Name | Formula or Method | Reference |
---|---|---|
Normalized Difference Vegetation Index | [59] | |
MERIS Terrestrial Chlorophyll Index | [60] | |
Photochemical Reflectance Index | [61] | |
Sun-Induced Fluorescence | SIF O2-A, 3FLD method | [8,62,63] |
Footprint Parameters | RGB Image Coordinates | |||
---|---|---|---|---|
Diameter (cm) | FOV (°) | x (pixel) | y (pixel) | |
mean (s.d.) | 4.64 (0.06) | 6.56 (0.01) | 2100 (5) | 1894 (5) |
Radiance HyUAS | Reflectance | |||||
---|---|---|---|---|---|---|
ρ-tarp | ρ-spec | |||||
RMSE | RRMSE% | RMSE | RRMSE% | RMSE | RRMSE% | |
Meadow | 0.0050 | 19.44 | 0.0065 | 7.99 | 0.0096 | 6.78 |
Asphalt | 0.0018 | 6.46 | 0.0319 | 15.88 | 0.0273 | 13.50 |
Gravel | 0.0011 | 4.13 | 0.0116 | 6.99 | 0.0079 | 4.29 |
Sand | 0.0077 | 20.79 | 0.0052 | 2.29 | 0.0021 | 1.16 |
All targets | 0.0047 | 14.74 | 0.0174 | 9.62 | 0.0150 | 7.88 |
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Garzonio, R.; Di Mauro, B.; Colombo, R.; Cogliati, S. Surface Reflectance and Sun-Induced Fluorescence Spectroscopy Measurements Using a Small Hyperspectral UAS. Remote Sens. 2017, 9, 472. https://doi.org/10.3390/rs9050472
Garzonio R, Di Mauro B, Colombo R, Cogliati S. Surface Reflectance and Sun-Induced Fluorescence Spectroscopy Measurements Using a Small Hyperspectral UAS. Remote Sensing. 2017; 9(5):472. https://doi.org/10.3390/rs9050472
Chicago/Turabian StyleGarzonio, Roberto, Biagio Di Mauro, Roberto Colombo, and Sergio Cogliati. 2017. "Surface Reflectance and Sun-Induced Fluorescence Spectroscopy Measurements Using a Small Hyperspectral UAS" Remote Sensing 9, no. 5: 472. https://doi.org/10.3390/rs9050472
APA StyleGarzonio, R., Di Mauro, B., Colombo, R., & Cogliati, S. (2017). Surface Reflectance and Sun-Induced Fluorescence Spectroscopy Measurements Using a Small Hyperspectral UAS. Remote Sensing, 9(5), 472. https://doi.org/10.3390/rs9050472