Magellan EDR/RAW Data |
Magellan EDR/RAW Data |
Sep 11 2020, 09:03 PM
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#1
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
Just curious, has anyone gone spelunking in the Magellan SAR EDR (raw) dataset?
https://pds-imaging.jpl.nasa.gov/data/magellan/edr/ Looks like a set of 9-track mag tapes were copied to CD-ROMs for preservation, and at some point the CD files were put online in PDS. In starting to look at it, I realized that lack of knowledge of mag tape volume/label/file/record structure and terminology may impede younger explorers of this dataset. |
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Mar 19 2023, 12:45 AM
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#2
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
" The Magellan DEM is really rough and blocky"
and that is a major under statement i have been able to clean it up a little bit bit not to much |
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Mar 19 2023, 07:16 PM
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#3
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
The radar maps in Fig. 2 A and B are annoyingly misaligned, something that is easy to miss with the eye, but longitude lines offered as references above Fig. 2A don't even remotely align with the un-labeled lines that appear between 2A and 2B. When I try to overlay the figures in Photoshop and "blink" them, the differences are apparent and cannot be resolved in any way with a mere translation between them. It feels like the text talks past this issue, saying that "the black box in © indicates the extent of the unrectified images in panels A and B," but it is clear that those panels, while obviously matching approximately, differ by more than the sizes of the features being discussed. It's strange. I can't tell if the work is sloppy or if the artifacts produced by the different geometries is simply enormous, but one or the other seems to be in play.
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