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The
Manuscript
is a paper submitted to Icarus on 8th February 2014 describing a
radar map of Titan seas and an analytic bathymetry model. It discusses
tidal dissipation and (briefly) ocean volumes. It calls particular
attention to the 'Throat of Kraken', a topographic constriction between
two main basins of Kraken, through which tidal currents may be quite
strong: analogy is drawn to the Corryvreckan in Scotland, and the
Strait of Gibraltar. The implications for tidal dissipation in Titan's seas, and for
mixing between the basins are discussed.

The paper, and the datafile (below) should be cited as follows
Lorenz, R. et al., A Radar Map of Titan Seas : Tidal Dissipation and
Ocean Mixing through the Throat of Kraken, Icarus, submitted (2014)

The "Data File" link hereafter is to an ASCII file that comprises the
analytic bathymetry model in the paper.
Data File
The bathymetry map (Supplemental Online File: see also
http://www.lpl.arizona.edu/~rlorenz/titansea.html) is an array of
integers, 325 rows by 270 columns, with the value corresponding to
estimated depth in meters. The (x,y) coordinates (0<=x<325, 0<=y<275)
for a location at latitude (LAT) and longitude (LON) are given
approximately by the transformations

x = Xc + S*[cos(LAT)*cos(LON)]

y = Yc + S*[cos(LAT)*sin(LON)]

with parameters S=-495, Xc=232, Yc=245. Because there is some
distortion in the map projection, these data should not be used for data
correlation studies - the original mosaic (figure 1) or better yet, the
raw radar images archived on the NASA Planetary Data System (PDS) should
be used.
The file here is generated with the assumption of A=0.5, thus the Ligeia
central depth is ~170m and the greatest depth overall in Kraken is 197m.
The array can simply be scaled (or indeed transformed to some other
function such as depth proportional to square root of distance from
shore) as desired.

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