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South Pole image from LOLA data
JohnVV
post Jan 5 2011, 04:39 AM
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I'm getting severe orbit streaking when I create high resolution(~5m) gridded datasets from the RDRs. Has anyone noticed orbit streaks in the 5m resolution GDRs?

The heighest point is 2078m the lowest is -2999 m. Orbit streaks are visible but not too bad in this image because it is using a lower resolution dataset (80m).

the poles "should" be much better than the mid latitude +45 to -45
Now there is the scientific removal but that will be in a few years .When there is much more data , that can be averaged better.
There is also an"Artistic " smoothing without bluing that i used for the 256 px./ deg. full map I made .
that involved using a heat flow pde that " G'mic" ( grastoration / Cimg.h ) uses .
an example


now that is NOT near the pole and thus needs a very BIG correction
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JohnVV
post Jan 6 2011, 06:24 AM
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just took a look at the south pole 10 m rdr IMG ,that is a bit striped
for the images below
1) the image on the left is a crop and ONLY had a "emboss" applied to it for viewing the 16 bit image
2) for the one on the right , the same plus some "destripping " in Gmic
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zeBeamer
post Jan 13 2011, 02:45 PM
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Current orbits are good to 15-20m, so I am not surprised that the orbit errors show up at 5m resolution. We're working on it (for example, by developping new gravity field models), but 5m is currently not achievable. (For reference, the original requirement was 50m). Maybe after GRAIL gives us a perfect gravity field!
Also, keep in mind that each laser footprint is ~5m in diameter, so your maps will have very sparse coverage at those resolutions.
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