Sea ice reconnaissance during HEM-bird flights
From APLIS07
During the helicopter-borne ice thickness measurements with the HEM-bird the AWI team took photographs of the sea ice cover in random intervals along the flight track. In general, the flight altitude of the helicopter was about 80 ft. The pictures were taken out of the left rear window of the helicopter, i.e. the display does not exactly cover the path of the instrument, but documents the general ice situation during the respective flight. In particular large leads, prominent ridges as well as strongly rubbled areas are considered. In general, changes of the surface pattern of the ice cover are documented.
In the following all flights during which photographs have been made are listed. The pictures are presented as animated GIF-files in two different resolutions: low (600x450 pixel) and high (2048x1536 pixel). Flight tracks followed current buys positions and were restricted by the range of the helicopter. In most cases the flight pattern resembles a triangles in order to achieve best spatial coverage. Buoys numbers are abbreviated and only last two digits of the official code 743xx are listed.
- Flight 1 on April 04,
outer ring of buoys: from camp to Buoy 60 to Buoy 53 & return to camp.
600x450 and 2048x1536
- Flight 2 on April 04,
outer ring of buyos: from camp to Buoy 62 to Buoy 55 & return to camp.
600x450 and 2048x1536
- Flight 1 on April 05,
outer ring of buoys: from camp to Buoy 57 to Buoy 61 & return to camp.
600x450 and 2048x1536
- Flight 2 on April 05,
inner ring of buoys.
- Flight on April 08,
north transect (first try, aborted): starting at camp site flying due north as far as possible and return to camp.
600x450 and 2048x1536
- Flight on April 09,
inner ring of buoys: from Camp to B58 to B54 passing camp to B63 to B59 passing camp to B56 to B64 & return to camp site.
600x450 and 2048x1536
- Flight 1 on April 11,
outer ring of buoys: from camp to Buoy 62 to Buoy 55 & return to camp.
600x450 and 2048x1536
- Flight 2 on April 11,
outer ring of buoys: from camp to Buoy 60 to Buoy 53 & return to camp.
600x450 and 2048x1536
- Flight on April 12,
outer ring of buoys: from camp to Buoy 57 to Buoy 61 & return to camp.
600x450 and 2048x1536
- Flight on April 13,
leaving camp site and relocating to Point Barrow (straight bearing towards Barrow).
600x450 and 2048x1536
On a UNIX or Linux computer the above animated GIF-files can be disjoint into the single images by the following command:
convert animation.gif +adjoin slide_%03d.gif
Please report errors in the animations to torge.martin@awi.de.
