These two images are of the same hurricane eye, which occurred slightly off-nadir in the granule, but
before the “pixel-trim” region. On the left, the data is presented exactly as it appears in the file (no
mapping). Lines appear where pixels from two adjacent scans overlap (indicated by the arrows). On the
right, the data has been mapped onto a projection of the Earth using the geolocation information. The
lines disappear. The geolocation correctly accounts for the overlap. This is a plotting issue, and not a
problem with the satellite or the data.
Aside: the eye appears more circular in the mapped image, which is indicative of the fact that the
horizontal resolution of the data is not identical in the cross-track and along-track directions (see slide 3).
The geolocation accounts for this also.