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It's June - Better LOLA?
Rick Sternbach
post Jun 16 2010, 12:20 AM
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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
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DDAVIS
post Jun 16 2010, 12:40 AM
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I will wait until the last data point is incorporated, what a great map that shall be!
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Phil Stooke
post Jun 16 2010, 01:48 AM
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http://pds-geosciences.wustl.edu/missions/lro/lola.htm

OK?

Phil


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JohnVV
post Jun 16 2010, 02:13 AM
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hay the gdr link finally works and is not gray.
ftp://pds-geosciences.wustl.edu/lro/lro-l.../data/lola_gdr/
but still the old data 3-15-2010
now the rdr is updated 6-1-2010
ftp://pds-geosciences.wustl.edu/lro/lro-l..._rdr/lro_no_01/

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Rick Sternbach
post Jun 16 2010, 04:06 AM
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QUOTE (Phil Stooke @ Jun 15 2010, 06:48 PM) *


Well, if it doesn't have .img or .jp2 stuck to it, I can't use it. smile.gif It would be lovely to have, oh, a file with a name like LDEM_128.img . I am in no way smart enough to use anything else that I have been seeing with a June date on it. Yeah, I've checked with the PDS and Imbrium pages, and I'll wait until the image files "get good." Been spoiled by MOLA.

Rick
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JohnVV
post Jun 16 2010, 04:22 AM
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QUOTE
Been spoiled by MOLA

well this is still a very,very early release
mola took a bit of time
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mhoward
post Jun 16 2010, 05:34 PM
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Just to save everybody a little time: the LDEM_64.IMG on that page is byte-for-byte identical to the one released in March, despite the new file modified time.
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ValterVB
post Jun 16 2010, 06:42 PM
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I see only the March release
here
ftp://pds-geosciences.wustl.edu/lro/lro-l.../data/lola_gdr/
and here
http://imbrium.mit.edu/DATA/LOLA_GDR/
Where you found the update?

Ciao
VB
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Phil Stooke
post Jun 23 2010, 03:24 PM
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Right... some of the data releases are delayed a bit, and maybe place-holder files are online while preparations continue. These are very large and complex datasets, and PDS documentation is time-consuming.

On another note - LRO has been in orbit for a year. In a few months the orbit is due to be raised as LRO enters its extended mission phase under the Science Mission Directorate.

Phil


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mhoward
post Jun 23 2010, 03:37 PM
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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.
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James Fincannon
post Jun 23 2010, 06:38 PM
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QUOTE (mhoward @ Jun 23 2010, 03:37 PM) *
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.
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elakdawalla
post Aug 2 2010, 04:13 PM
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An announcement from the PDS -- I don't know if this affects any of the work that you all are doing --
QUOTE
[NASA PDS] LRO LOLA INTERIM RELEASE ANNOUNCEMENT

To users of Lunar Orbiter Laser Altimeter (LOLA) data from the Lunar
Reconnaissance Orbiter (LRO) Mission:

The LOLA Team discovered and corrected a processing error that affected
time tags in RDR data products from day 2010-02-15 onwards. The Team
also corrected minor errors in EDR and RDR data product labels. This
interim release consists of revised versions of all previously released
RDR products and their PDS labels, and revised EDR labels only
(not data files).

The revised data are available from the LOLA Data Node via the Lunar
Orbital Data Explorer:

http://ode.rsl.wustl.edu/moon/

and from the PDS Geosciences Node:

http://pds-geosciences.wustl.edu

A revised product can be identified by the keyword
PRODUCT_VERSION_ID = "V1.03" in its label.


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James Fincannon
post Aug 2 2010, 04:24 PM
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QUOTE (elakdawalla @ Aug 2 2010, 05:13 PM) *
An announcement from the PDS -- I don't know if this affects any of the work that you all are doing --



Yes, this will affect my work. Thanks.

I am baffled also by the lack of data density. I am waiting for LROC stereo imagery inferred heights correlated with the LOLA data. The problem is that LOLA, even at the poles, has <.3% of the surface area "painted" by LOLA light. Interpolations of height seem somewhat unreliable based on that. Normally, one could generate nice looking 3D models without worrying about this, but doing illumination analysis and being impacted by unknown nearby terrain or planning mobility paths can't be done with LOLA alone.
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JohnVV
post Aug 2 2010, 07:04 PM
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QUOTE
I am baffled also by the lack of data density.

it is still early
the mars mola took a bit of time
the LOLA will also
QUOTE
An announcement from the PDS -- I don't know if this affects any of the work that you all are doing --

don't know yet
the last update was to fix the errors in the .lbl files we have been finding
" corrected minor errors in EDR and RDR data product labels "
those errors
the "time tags" ??? don't know but the derived image dost match up with Kaguya
will have to look
but people might want to read the errata.txt
http://pds-geosciences.wustl.edu/lro/lro-l...1xxx/errata.txt
the relevant part
CODE
RELEASE NUMBER: n/a
RELEASE DATE: 2010-07-20
DATA COVERAGE: 2009-06-18 to 2010-03-22 (entire mission through 2010-03-22)
PRODUCT TYPES RELEASED FOR THIS ARCHIVE: No new products
PRODUCT TYPES UPDATED FOR THIS ARCHIVE: EDR, RDR
REASON FOR UPDATES: Data processing correction

The LOLA Team discovered and corrected a processing error that affected time
tags in RDR data products from day 2010-02-15 onwards. The Team also
corrected minor errors in EDR and RDR data product labels. This intermediate
release consists of revised versions of all previously released RDR products
and their PDS labels, and revised EDR labels only (not data files). A revised
product can be identified by the keyword PRODUCT_VERSION_ID = "V1.03" in its
label.

The following data files and corresponding labels, which were previously
included, have been excluded for this and future releases due to poor data
quality.

DATA/LOLA_EDR/LRO_CO/LOLAEDR091931559.DAT
DATA/LOLA_EDR/LRO_CO/LOLAEDR091931559.LBL
DATA/LOLA_EDR/LRO_CO/LOLAEDR091931759.DAT
DATA/LOLA_EDR/LRO_CO/LOLAEDR091931759.LBL

DATA/LOLA_RDR/LRO_CO/LOLARDR091931559.DAT
DATA/LOLA_RDR/LRO_CO/LOLARDR091931559.LBL
DATA/LOLA_RDR/LRO_CO/LOLARDR091931759.DAT
DATA/LOLA_RDR/LRO_CO/LOLARDR091931759.LBL

Gridded Data Record (GDR) and Spherical Harmonics Analysis Data Record
(SHADR) products have not been revised since Release 2.
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djellison
post Aug 2 2010, 09:37 PM
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Humph. Still some major problems with this imho - the ends still don't match when you wrap it around or cut'n'paste in photoshop to drop the meridian in the middle.
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