Midwestern Crop SIF and Vegetation Indices from FluoSpec2 System

Half-hourly ground solar-induced chlorophyll fluorescence and vegetation indices are provided for seven crop sites in Nebraska and Illinois from 2016 to 2021. The dataset includes raw SIF measurements from multiple algorithms and vegetation indices like NDVI and EVI, collected using the FluoSpec2 system across miscanthus and corn-soybean rotation sites. It is hosted by the National Aeronautics and Space Administration.

Use Cases

• Comparing SIF retrieval algorithms (sFLD, 3FLD, iFLD, SFM_linear, SFM_nonlinear) for accuracy assessment in crop canopies.
• Analyzing relationships between vegetation indices (NDVI, EVI, Red edge chlorophyll index) and measured FPAR from quantum sensors.
• Upscaling nadir SIF to eddy covariance footprint using the provided correction factor (ratio_EC footprint, SIF pixel).
• Studying seasonal photosynthesis dynamics in miscanthus and corn-soybean rotations using half-hourly SIF time-series.
• Calibrating remote sensing models with ground-truth data from four EC tower sites and three private farm sites.

Strengths

• Data covers a 6-year time range (2016-2021) across seven distinct field sites.
• Includes SIF derived from four different retrieval algorithms, allowing for methodological comparison.
• Measurements are paired with eddy covariance tower data at four sites, enabling direct flux comparisons.

Limitations

• Conflicting metadata: one platform lists a last update date of 2026-03 12, while another lists 2021-09-21.
• Key technical details like row count, file size, and specific column names are not provided by any source.
• The license is specified only as 'other-license-specified', requiring further investigation for reuse terms.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Spectral data collected by the FluoSpec2 system, installed near planting and uninstalled after harvest.

Time Range

2016-2021

Freshness

2026-03-12 21:44:47.701176

Geography

Seven crop sites in Nebraska and Illinois, USA.