[X] My Assistant

[Rick Sternbach]

Okay, It's June 15. Where's the updated LOLA data? I keep finding the stuff from March in all the usual places. Okay, I'm sure it may take a few days, but does anyone have a clue if the LDEMs are going to get cleaner and crisper this time around?

I've already seen a resin casting of a moon globe made from the LDEM_64 data, but I wanted to wait a bit until more blanks were filled in.

Rick

[mhoward]

I'm having a go at gridding the LOLA RDR data myself. It's going to take me several days to download all the data, though.

[James Fincannon]

I'm having a go at gridding the LOLA RDR data myself. It's going to take me several days to download all the data, though.

I have been using the RDR data (not the DEMs) for lunar illumination work. You have to be careful to use the right filters.

In RDRSIS.pdf it shows the shot flags for each shot.
http://imbrium.mit.edu/DOCUMENT/RDRSIS.pdf
http://imbrium.mit.edu/LABEL/LOLARDR.FMT

Use the ones with 0 as the least significant bit. It is interesting to understand the criteria for eliminating points. There are so many shots, that it is impossible to manually filter them all. The main automated filter they include is to compare the 5 shots against each other (not against other nearby shot sets). I think the slope limit is 37 deg between shots. This does a good job on most shots.

I have looked around both poles and found some that were erroenous comared against existing LOLA data from other passes (no shots have yet been manually editted/flagged in the RDR datasets so far). If you are interested in them, I can give you a list. It isn't that big and would likely not show up if you are using a tool like GMT to process the points into a DEM (unless you are shooting for high resolution) due to the averaging and surface fitting that tool uses.