AMSR swath ASI sea ice concentration (Spreen et al., 2008; Melsheimer et al., 2019) in NetCDF format.
- https://data.seaice.uni-bremen.de/amsr2/asi_daygrid_swath/swath/
- one folder per day, naming: asiYYYYMMDD (i.e. asi20200101 etc.)
- The swath files keep part of the name of the original AMSR2 level 1B data, s.th, like GW1AM2-20200101-073D-asi.nc where 073D is the descending half swath at position (track no.) 073.

The netCDF file contains:
+ the sea ice concentration data in two separate 2-dim. arrays, the so-called A scan and the B scan (in the 89 GHz channels, there are two scan lines spaced 5 km apart where the lower-frequency channels have just one scan line); each array contains roughly 2040 (plus minus a few) scanlines of 486 values
+ the latitude and longitude values of all elements of A and B scan in four appropriately named arrays of the same size
+ the time of acquisition of each scan line in a 1-dim array of about 2040 elements (name: Scan_Time); A and B scan lines have the same acquisition time; the units are seconds since 1 Jan, 1992, 0:00 UTC

2025-01 contact: Christian Melsheimer (melsheimer@uni-bremen.de), Gunnar Spreen (gunnar.spreen@uni-bremen.de)