This dataset contains information from drone flights over the Alice Holt Forest. This work was conducted as part of a wider field campaign examining photosynthesis and forest structure across the Alice Holt site.

Data were collected in the daytime on the 18th July 2023. Flights were conducted at two sites within the Alice Holt forest, the first at approximately 51.155396° N, –0.864384° W (‘Site One’), and the second at approximately 51.155453° N, –0.865355° W (‘Site Two’). These locations are shown visually in ‘Sample_Locations.pdf’. The positions within each flight are recorded in the relevant Trigger_Log directories.

The data have been processed to radiances using a python conversion tool which is given within the dataset (Piccolo_Radiometric_Conversion_Tool.py). The dataset is comprised of 434 files, that are a total of 305 MB. Data are provided as both .nc and .csv files. The XXX_irradiance.csv files contain irradiances (W cm-2 nm-1) are organized by wavelength (nm) and acquisition time, with five samples at each wavelength. The XXX_radiance.csv files contain a radiance (W sr-1 cm-2 nm-1) for each wavelength.

Data from both site locations are within the ‘Site_One_51_155396_-0_864384’ and ‘Site_Two_51_155453_-0_865355’ directories, with the flights for each given in subsequent directories, e.g., ‘First Flight_51_155373_-0_864409’. Data for each flight is then found in e.g., ‘splice_20230718_d2_s1_40a’. Calibration files and processing code are also included.