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. 2021 Sep 7;16(9):e0256978. doi: 10.1371/journal.pone.0256978

Table 1. UAV aerial images acquisition during growing seasons (June to August).

Image date Flight Altitude (m) The number of Images Covering Area (m2) Ground Sampling Distance (cm/pixel) Illumination Wind (m/s)
22062019 (50 DAS) 20 74 4300 0.69 Mist 3.9
14072019 (72 DAS) 40 77 9000 1.43 Mist 2.7
26072019 (85 DAS) 40 68 7800 1.39 Cloudy 3.9
06082019 (99 DAS) 40 97 10600 1.34 Cloudy 3.2
31082019 (121 DAS) 40 93 9100 1.40 Clear 2.7