Table 1 Full list of all measurement flights conducted within the WIPAFF project.

From: First in situ evidence of wakes in the far field behind offshore wind farms

Flight code

Date (dd.mm.yyyy)

Start Time (UTC)

End Time (UTC)

WS (m s−1)

Wind dir (°)

Wake length (km)

Atmospheric stratification

September

 Flight 1

06.09.2016

14:13

17:20

7

190

25

stable

 Flight 2

07.09.2016

09:25

13:00

4

210

20

stable

 Flight 3

07.09.2016

10:00

14:00

4

190

at least 10

stable

 Flight 4

08.09.2016

10:38

14:25

8

120

at least 40

stable

 Flight 5

09.09.2016

10:54

14:50

6

240

at least 45

stable

 Flight 6

09.09.2016

15:43

19:17

6

250

at least 5

unstable

 Flight 7

10.09.2016

07:30

11:30

7

190

45

stable

 Flight 8

10.09.2016

12:05

16:00

4

190

at least 20

stable

March–April

 Flight 1

30.03.2017

15:57

19:02

15

240

70

stable

 Flight 2

31.03.2017

15:36

19:00

13

180

50

stable

 Flight 3

05.04.2017

15:42

16:34

14

310

10

neutral

 Flight 4

06.04.2017

15:29

18:22

8

310

at least 10

unstable

 Flight 5

09.04.2017

12:36

16:07

7

220

at least 50

stable

 Flight 6

09.04.2017

16:32

20:12

4

200

n.a.

stable

 Flight 7

11.04.2017

11:25

15:10

8

300

5

unstable

 Flight 8

11.04.2017

16:12

20:04

8

240–280

25

neutral

 Flight 9

13.04.2017

13:35

17:39

16

290

10

neutral

May–June

 Flight 1

17.05.2017

12:35

16:28

8

110

n.a.

stable

 Flight 2

17.05.2017

17:16

21:22

12

120

55

stable

 Flight 3

23.05.2017

15:42

16:34

5

250

at least 25

stable

 Flight 4

23.05.2017

13:18

17:15

11

310

at least 35

neutral

 Flight 5

24.05.2017

07:40

11:34

8

300

n.a.

unstable

 Flight 6

24.05.2017

12:13

16:11

9

270

5

unstable

 Flight 7

27.05.2017

09:57

13:58

10

150

at least 50

stable

 Flight 8

27.05.2017

14:39

18:36

12

140

55

stable

 Flight 9

31.05.2017

09:58

13:46

8

290

2

unstable

 Flight 10

31.05.2017

15:00

18:50

9

290

0

unstable

 Flight 11

01.06.2017

08:55

12:54

6

300

0

unstable

 Flight 12

02.06.2017

08:55

12:40

4

170

at least 15

stable

August

 Flight 1

08.08.2017

10:35

14:35

9

80

at least 35

stable

 Flight 2

08.08.2017

15:06

19:07

14

80

at least 55

stable

 Flight 3

09.08.2017

10:34

14:37

15

210

n.a.

unstable

 Flight 4

09.08.2017

15:09

19:05

13

240

n.a.

unstable

 Flight 5

10.08.2017

12:49

16:54

5

330

n.a.

unstable

 Flight 6

14.08.2017

12:08

16:07

8

150

at least 35

neutral

 Flight 7

14.08.2017

16:40

20:31

7

120

50

stable

 Flight 8

15.08.2017

09:22

13:15

8

180

30

stable

 Flight 9

17.08.2017

08:06

12:10

12

160

40

stable

October

 Flight 1

14.10.2017

14:59

18:40

15

260

n.a.

stable

 Flight 2

15.10.2017

09:05

13:09

14

200

n.a.

unstable

 Flight 3

15.10.2017

13:52

17:50

13

190

at least 25

stable

  1. Wake length: Assessed wake distance with a wind speed deficit with more than 0.1 m s−1 compared to the undisturbed flow. Wake lengths measured during a flight pattern that did not cover the full extent of the wake are indicated with “at least”. Some flights focused on the processes above wind farms, hence, no data is available describing the length of the wakes, for such flights the wake length is not available (n. a.). Atmospheric stratification: Estimation of the atmospheric stability by analysing the airborne measured potential temperature vertical profiles between near surface (30 m) and hub height (100 m), which were flown close to the wind farm. WS means wind speed. Bold text marks the investigated flight in this study.
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