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Flight times 

List of instruments 

Aircraft notes 

 

List of flight times (Partenavia P68B D-GERY)

Day

#

Take-off/

Landing (UTC)

Above Cabauw (UTC)

05 Sep

1

2

08:55-10:28

12:39-14:06

09:13; 10:09

12:58; 13:55

06 Sep

3

09:14-11:22

09:49; 11:00

11 Sep

4

09:27-10:47

09:42; 10:28

13 Sep

5

09:02-10:47

09:24; 10:00

10:03

14 Sep

6

11:53-12:22

-

18 Sep

7

09:49-11:23

10:19;10:32;10:38;

10:44;10:55;11:08

22 Sep

9

08:32-09:11

No

23 Sep

10

11

09:05-10:44

13:43-16:06

09:18;09:37;10:15;10:31

13:58;14:36;15:47

25 Sep

12

13:56-15:27

14:19;14:31;15:11

26 Sep

13

09:15-10:47

09:54;10:36

27 Sep

15

09:24-10:35

no

28 Sep

16

09:40-11:52

10:05

    

List of flight times (Merlin)

Day

#

Take-off/

Landing (UTC)

Above Cabauw (UTC)

11 Sep

4

09:20-11:30

09:29:57,09:31:16,

10:22:22,10:56:25,

11:21:15

13 Sep

5

08:54-11:20

09:27:04,09:52:42,

10:19:04,10:45:55,

11:12:48

20 Sep

8

11:00-13:42

11:24;11:38;12:10

12:27;12:29;12:54

13:22

22 Sep

9

08:20-10:30

08:27; 08:53; 08:56

09:31; 09:54; 09:56

10:20

23 Sep

10

 

 

11

08:19-10:33

 

 

12:43-14:25

08:27; 08:53; 08:56

09:21; 09:26; 09:52

09:55; 10:22

13:14; 13:17; 13:43

13:45; 14:11

25 Sep

12

14:10-15:35

14:24; 14:44; 14:46;

15:04; 15:22

26 Sep

14

13:06-15:24

13:23; 13:42; 13:44; 14:03; 14:07;

14:25; 14:27; 14:46; 15:05

27 Sep

15

09:33-10:53

09:49; 10:14; 10:17; 10:44

    

List of flight times (Cessna)

Day

#

Take-off/

Landing (UTC)

Above Cabauw (UTC)

05 Sep

1

2

08:34-10:17

12:35-14:30

09:15:50, 09:58:00

13:11:38, 14:07:40

06 Sep

3

09:05-11:16

09:47:59, 10:55:20

13 Sep

5

08:45-11:37

09:25:31, 10:06:36, 10:10:56, 10:51:52, 10:55:26

18 Sep

7

09:51-11:36

10:23:30, 10:32:10, 10:36:10, 10:49:29, 10:59:03, 11:03:04, 11:12:42, 11:15:49

20 Sep

8

11:37-14:00

12:11, 12:51:07, 12:57:13, 13:37:32

22 Sep

9

10:22-12:46

09:01:35, 09:41:59, 09:45:07, 10:24:41

23 Sep

10

 

11

08:25-10:58

 

12:31-15:18

08:45:22, 09:28:39, 09:32:09,

10:12:27, 10:16:05

12:49:17, 13:31:34, 13:35:13,

14:17:53, 14:24:13

25 Sep

12

13:18-14:57

13:44:40; 14:13:45; 14:17:54;

14:46

26 Sep

13

08:57-10:51

09:54:50; 10:34:25

    

 

Actual list of instruments installed on the Partenavia P68B (10 September 2001)

Name

Specification

Measured Quantity

PVM-100A

Dd < 40 µm

LWC, Reff

Fast-FSSP

Dd < 40 µm

Drop size distribution

OAP

Dd=25-800 µm

Drop size distribution

PCASP-X

Dp = 0.1-1 µm

Particle size distribution

CPC-3010

Dp > 0.01 µm

Particle Concentration

Albedometer (incl. active horizontal stabilization)

l =290-1000nm

(2-3 nm FWHM, 1024 channels)

Up- and downward spectral irradiances

 

 

Actual list of instruments installed on the Merlin IV: see 4D-CLOUDS Web Page.

 

Actual list of instruments installed on the Cessna

Name

Specification

Measured Quantity

casi

450-1000 nm

radiance images

FUBISS

400-1000 nm

400-1000 nm

600-1000 nm

1000-1700 nm

(zenith) radiances

(nadir) radiances

(nadir) radiances

(nadir) radiances

Midac (FTIR)

5-17 mm

(nadir) radiances

COMMENTS:

 

 

Aircraft notes

Cessna and Partenavia arrive, instrument check.

Rainy day, calibration.

Good Day, Two flights:

1.     Before warm front. Partenavia: Six good cloud penetrations, four of these with no Ci.

Mostly bad conditions: altostratus between 7/8 and 3/8, a short period with 1/8 cirrus.

2.     Partly good, Scattered clouds and less thick.

Good conditions: no cirrus/altostratus; stratocumulus 7/8; partly cumulus 3/8.

One flight, very inhomogeneous clouds, mostly Ci, not useful for radiation but maybe good for microphysics.

Occasionally good conditions: most often cirrus above (1/8 - 4/8).

No flights.

One flight, Test of coordination of flight patterns between Partenavia and Merlin.

Partenavia: Scientifically not too useful (Susanne is more optimistic), too inhomogeneous clouds in nearly all altitudes. Partenavia: Only chance: Albedo of scattered cloud fields. Some penetrations through Cu con.

Merlin: Coordinated flight with all three aircraft. The pattern with continuous ascents and descents of the Merlin is not very well practicable due to Air Traffic Control. At the end of the flight horizontal legs were done in different heights. Because of the inhomogeneous cloud structure (single Cu of different thickness with only small particles) the data processing will be difficult.

No flight, shower weather.

One flight with all three aircraft.

Partenavia: Data look very promising, no Ci, thick cloud layers with precip and ice.

Merlin: Co-ordinated flight with all three aircraft. The Merlin started with horizontal flight legs at cloud base climbing up to 8300 ft. Measurements were done in single Cu (lower part) and partly in a SC field (upper part), both with precipitation and ice (mainly needles) in the upper layers. Cloud situation was changing during flight time. Data quality is good.

Good conditions concerning cirrus/altostratus: none of them occurred. At Cabauw and Bravo 5 cumulus clouds higher than flight level. One large cloud gap; in between a nice stratocumulus layer.

No official flight, Partenavia makes technical test flight. Some scattered Cu, above completely cloud-free.

Again no flight, frustrating weather. Cb with icing cloud tops.

No flight, heavy showers from North, Cbs.

Coordinated flight with MAPS-Y. Partenavia and Cessna are flying horizontal legs (approx 8 km) above Cabauw (i.e. above MAPS-Y) at different altitudes. Scattered cloud fields near the ground, high Ci at altitudes above flight levels of Cessna and Partenavia.

No flight scheduled, heavy rain all day.

Scattered clouds in nearly all altitudes, cloud tops at 8000 ft, 4/8 Ci above. Merlin makes a microphysical flight, Cessna flies above the Merlin, Partenavia stays on the ground.

Scattered clouds again, much Cirrus above. No flight of Partenavia and Cessna, Merlin makes a test flight for Fast_FSSP about 14:30 local.

Scattered clouds, no good conditions. Nevertheless, after the briefing we decide to try. Partenavia makes only a short flight (radiation measurements seem to be net very useful) and then cancels. Merlin and Cessna make longer flights.

Good conditions the whole day, two flights by the three aircraft. No Ci above, different cloud layers in different altitudes.

Scattered clouds all the day, no flight.

Fog in the morning, disappearing at Rotterdam around noon. In the afternoon scattered clouds evolve. Hazy boundary layer. Partly Ci-free. Flight legs may be suited for surface albedo measurements.

Andre’s birthday! Fog in the morning disappears around 10 local. Partenavia and Cessna fly for albedo measurements. Above Cabauw still lifted fog layer. Partly we had good conditions for surface albedo measurements. In the afternoon, Merlin makes a microphysics flight.

Unclear weather situation. In the afternoon heavy convection is expected to develop. Therefore decision to fly as early as possible. All three aircraft take off around 11 local. Very scattered cloud conditions with clouds in all possible altitudes.

(from Merlin:) Due to the weather situation, a short flight was planned with all three aircraft. The Merlin made a flight pattern between points S1 and S5. The idea was to make ascents and descents to get as many samples as possible in the open Cu field between both points. So, 4 legs could be flown, one horizontal leg at 2100 ft and three with ascents and descents between 2000 and 5000 ft. The cloud field was very inhomogeneous. Cloud base of single Cu was sometimes below 2000 ft and sometimes above. A few clouds developed already to heights higher than 5000 ft. Therefore, it will be difficult to characterise cloud structure by the measurements. In general, all samples showed only small particles in the size range smaller than 20 micron, but occasionally high liquid water content of more than 1 g/m3.