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specMACS on CIRRUS-HL campaign

summary of research flights

datenamereportremarks
2021-06-24 HALO-0624
  • EMI Flight
  • high cloud coverage
  • 13:24 - 15:02: In-situ measurements
  • 15:02 - 15:27: Above clouds, homogeneous cloud field, liquid/mixed phase cloud underneath (cloudbow visible)
2021-06-25 HALO-0625
  • Instrument Tests inside and outside of clouds
  • Overpass over MIM and Hohenpeißenberg Radar
  • Takeoff: 11:04 UTC
  • Landing: 16:50 UTC
2021-06-26 HALO-0626
  • Takeoff: 07:59 UTC
  • 07:59 - 15:29
  • 12:04 - 12:08: In-situ
  • 12:16 - 12:19: In-situ
  • From 13:27 on: In-situ
  • From 14:38 on: In-situ
  • 12:42 - 12:52: Clearsky
  • 11:56 - 12:36:
  • First cumulus/altocumulus clouds, later altostratus and then cumulus/clearsky alternating
  • Most of the time above clouds
  • Landing: 15:27 UTC
2021-06-28 HALO-0628
  • Takeoff: 08:07 UTC
  • North of the Alps mainly cloud-free at the beginning, later cumuli
  • in cirrus: 9:32-9:39, 11:05-11:15, 11:30-11:40, at 12:52, 12:05-12:10, 13:15-13:22, 14:09-ca.15:00
  • broken clouds: 11:40-12:06, more cloudy until 12:20 UTC
  • Overpassing ground stations in Jülich, Leipzig, Munich, Hohenpeißenberg
  • Landing: 15:41 UTC
2021-06-29 HALO-0629
  • Takeoff: 09:00 UTC
  • specMACS measurements start at 09:33 UTC
  • 09:33 - 10:35: Above mostly very stratiform clouds, cloudbow visible fairly consistently.
  • 10:35 - 13:50: Within cloud. Intermittent glints visible (10:50 - 11:05 and 12:10 - 12:40), only very occasional cloudbow.
  • 13:50 - 14:20: Above clouds, first stratus, then some clearing. Cloudbow visible.
  • 14:20 - 14:33: Above very loose cumulus clouds, cloudbow visible.
  • Stopover: 15:00 - 15:58 UTC
  • 16:25 - 16:40: Above clouds, first homogeneous, then very loosened, cloudbow visible
  • 17:08 - 17:26: Inside cloud.
  • 17:28 - 17:46: Above a rather homogeneous cloud cover, cloudbow visible
  • 17:52 - 18:20: Inside a cloud
  • 18:20 - 18:35: Above clouds
  • Landing: 18:47 UTC
  • VNIR shutter closed
2021-07-01 HALO-0701
  • Takeoff: 10:03
  • Cloudiness estimated 7/8
  • On the one hand low/medium cloudiness, often structured
  • On the other hand above it an often thin but sometimes denser cirrus layer
  • Landing: 15:10:50
2021-07-05 HALO-0705
  • Takeoff: 06:21 UTC
  • Complex cloudiness; mostly 3 layers: shallow cumulus; altocumulus/stratus; cirus;
  • HALO is often in the cloud
  • a few short cloudless sequences over the ocean for in-flight calibration
  • Stopover: 10:38-11:36 UTC
  • Landing: 18:42 UTC
2021-07-07 HALO-0707
  • Aim: Cold cirrus clouds in air masses with arctic and mid-latitude origin west of Iceland
  • Takeoff: 06:29
  • Stopover: 12:46-13:50
  • Landing: 18:38
2021-07-08 HALO-0708
  • Probe convective cirrus over Switzerland
  • Takeoff: 13:12 UTC
  • 13:17 coming out of the clouds immediately cloud bow... from 13:31 even cloud bow, glory and glint in broken cloud layers.
  • 13:40-14:00 in or very near cloud cover
  • 14:00 - 14:08 Variable cloud cover with cloud bow and glory
  • 14:08 - 14:13 in clouds
  • 14:20 Cloud bow and glory again on medium-high or low cloud cover
  • 14:47 in or very near clouds
  • 15:11 cloud bow and glory again on changing clouds
  • 15:58 in or very near clouds
  • 16:02 then again briefly glory and cloud bow on low clouds
  • until landing almost without gaps in or very close clouds
  • MIM und Hohenpeißenberg Overpasses
  • Landing: 18:04 UTC
  • VNIR shutter closed
2021-07-12 HALO-0712
  • Double flight to Island, contrail cirrus above Germany, in-situ cirrus west of iceland, arctic liquid-orig. cirrus above iceland
  • Takeoff: 06:37 UTC
  • First flight mainly remote sensing
  • Second flight mainly in-situ
  • Stopover: 11:38-12:27 UTC
  • Landing:18:45 UTC
2021-07-13 HALO-0713
  • Convection Flight
  • Takeoff: 13:07 UTC
  • 13:07 -13:58: in situ, in the cloud except for very short sections.
  • low cloud coverage, single convective clouds
  • 15:02: subparhelia + cloudglint in pola
  • 15:13-15:45: in situ in cloud
  • 15:45-16:00: convective clouds
  • 16:00-18:11: in the cloud or just at cloud top
  • Touch and Go in Brescia: 14:29-14:40 UTC. Data is missing
  • Landing: 18:23 UTC
2021-07-15 HALO-0715
  • In-situ/contrail cirrus system forming over Portugal/Western Spain
  • First flight: remote sensing
  • Second flight: in-situ measurements
  • Takeoff: 06:23 UTC
  • Stopover: 10:30 - 12:02 UTC
  • Hohenpeißenberg Overflights
  • Landing: 18:18 UTC
2021-07-19 HALO-0719
  • Aim: in situ, liquid orig. cirrus west of Norway
  • Refueling in Bergen
  • Takeoff: 06:17 UTC
  • Stopover: 12:44 UTC - 13:37 UTC
  • Landing: 18:14 UTC
2021-07-21 HALO-0721
  • Aim: Cirrus clouds in air masses originating over North Atlantic west of Spain
  • Refueling: Santiago de Compostela
  • Flight 1: in-situ and lidar legs over Spain also including contrails
  • Flight 2: contrails over Biskaya and in situ flight during a CALIPSO overpass
  • Return flight: remote sensing
  • Takeoff: 05:55 UTC
  • Stopover: 10:56 - 11:56
  • Landing: 17:05 UTC
2021-07-23 HALO-0723
  • High-latitude soot/contrail cirrus in transition between day and night
  • Flying along East coast of England
  • Observe temporal evolution of cirrus clouds
  • Measure radiative properties of cirrus
  • Takeoff: 14:28 UTC
  • Landing: 22:30 UTC
2021-07-28 HALO-0728
  • Cirrus over land (UK), and over sea south east of Iceland
  • along the later CALIPSO track: in-situ leg
  • CALIPSO was intercepted at 13:45 UTC
  • Way back home: remote sensing leg
  • Takeoff: 11:05 UTC
  • Landing: 17:55 UTC
2021-07-29 HALO-0729
  • Cumulus Clouds, mostly above clouds
  • Takeoff: 11:45 UTC
  • Landing: 16:02 UTC

specMACS products

Products derived from the specMACS data captured during CIRRUS-HL campaign can be downloaded here.

the specMACS instrument

specMACS is a hyperspectral imager, capturing one image line at a time. It is sensitive in the range of approx. 400nm to 2500nm and has a field of view of approximately 35°. During CIRRUS-HL it is mounted on the HALO aircraft facing downwards and is accompanied by two 2D polarization resolving cameras. More information can be found in Ewald et al. (2016).

general remarks

During the campaign we had problems with the weighting of the individual channels, which is why the color correction of the videos is not yet perfect. Furthermore, we have only from single days the data of the VNIR camera due to issues with the shutter.

more information

If you have any questions or requests, please contact veronika.poertge@physik.uni-muenchen.de.