| Large Surface Coverage Mosaic of Titan;
| September 17, 2005
Indicator for North added November 6, 2005 (read more)
Surface Coverage Mosaic of Titan in its final version
This is the fourth and final version of my Mosaic of
the surface of Titan,
stitched mainly from DISR Medium Resolution Imager (MRI) data,
supplemented by some High Resolution Imager (HRI) data at the center
and some Side Looking Imager (SLI) data at the rim. The red circle
marks the Huygens landing site.
The improvements with respect to the version III include brightness,
contrast and histogram adjustments on the individual images to hide the
them. These adjustments often contain a gradient along the seam, but no
artificial smoothing. If I could not hide a seam this way I left it as
it was, to avoid introducing artifacts.
For some areas raw images with
better contrast or more details visible could be found to replace the
After some hundred hours of work on the Huygens images I am
quite shure that this will be my final version of the "Large Surface
Coverage Mosaic", unless I discover some considerable errors.
The scalebar at the lower right is 5 km long after the original
published by the Huygens DISR team.
In case the correlation
between the Huygens mosaic and the Cassini ISS images I have suggested
would be correct, the scalebar would be about 12.5 to 15 km long. But
at the moment there is evidence that the visual correspondence between
the Huygens mosaic and the Cassini images I have presented may be by
chance, since radio science tracking of the Huygens probe from Earth
during its descend, as far as it is analyzed up to now, seems to
confirm the ESA height calibrations (private
with Daniel Fischer, who visited the DPS conference in Cambridge). The
failure to find a visual
correspondence of the Huygens mosaic and the Cassini images (VIMS and
ISS), may be due to the longer wavelength used for mapping
Titan from orbit with respect to the DISR optics onboard of Huygens.
I hope that the Titan 8 flyby (October 27, 2005), with the planned
radar swath of the Huygens landing area, will
result in a definite decision concerning the correlation between the
Huygens mosaics and the Cassini images.
Older Versions of my Large Surface Coverage Mosaic:
May 10, 2005
Version II April 13, 2005
I February 12, 2005