Skip to main content

Table 4 Selected weather conditions prevailing at the time of thermal image capture (A) and some daily average values (B)

From: Remote, aerial phenotyping of maize traits with a mobile multi-sensor approach

Date year-month-day 2011-07-11 2011-07-26 2011-08-02 2011-08-12 2011-08-16 2011-09-15
Time hh:mm:ss 17:45:38 16:45:38 17:25:38 17:25:38 17:25:38 14:25:38
Days after sowing days 81 96 103 113 117 147
Thermal timea °C days 612 727 793 893 940 1275
A at time of thermal capture        
Air temperature (TA) °C 25.95 24.40 27.52 24.40 24.01 21.71
Relative humidity (rH) % 51.25 37.75 53.25 56.25 69.75 56.25
Dew point °C 15.1 9.1 17.2 15.1 18.2 12.6
Wind speed m s−1 0.93 1.3 0.74 1.3 0.56 0.93
Gust speed m s−1 2.23 3.15 1.86 3.53 2.23 2.41
Soil temperature in 5 cm depth (TS) °C 20.63 17.34 19.20 18.70 20.15 17.32
Vapour pressure deficit (VPDair)b kPa 0.62 0.76 0.62 0.54 0.37 0.50
Photosynthetically active radiation (PAR)c μmol s−1 m−2 1422 1082 ndd 1611 1043 nd
B based on daily data        
Maximum air temperature (TMAX) °C 27.3 25.0 28.1 26.1 26.1 21.9
Evapotranspiration (ETO- Penman)e mm day−1 4 3.1 3.7 4.5 3.1 2.1
Radiatione kWh m−2 7.0 5.4 6.5 5.5 5.4 4.6
Sun hourse h 12 9.0 11.0 11.0 10 9.0
7 day cumulated precipitation mm 40.6 37.0 30.4 36.0 22.8 24.8
Total cumulated precipitation mm 230.2 329.8 360.2 415.4 434.4 508.0
  1. aTT = ∑if ≥ 0((Tmax + Tmin)/2)- Tbase, Tbase of 8°C, bcalculated according equation, cmeasured with a line quantum sensor, dnot detected, eprovided by the meteorological service (LTZ, Baden-Württemberg, Germany).