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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).