MSL data in the PDS and the Analyst's Notebook, Working with the archived science & engineering data |
MSL data in the PDS and the Analyst's Notebook, Working with the archived science & engineering data |
Feb 27 2013, 07:22 PM
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
"February 27, 2013. MSL Release 1, part 1, Sols 0-89.
The first release of MSL data takes place in two parts. Part 1, February 27, 2013, includes raw data products (EDRs) acquired on Sols 0 through 89, August 6 through November 5, 2012, for these instruments: APXS, ChemCam, DAN, Hazcam, Navcam, and REMS, along with SPICE data. Part 2, March 20, 2013, will include the derived data products (RDRs) for Sols 0 though 89 for the APXS, ChemCam, DAN, Hazcam, Navcam, and REMS instruments, along with both the EDRs and RDRs for the CheMin and RAD instruments, and the RDRs for the SAM instrument. Release 1 does not include data from the MAHLI, MARDI, or Mastcam instruments. These instrument teams have not yet delivered data products to PDS. Some documents in the MSL archives are awaiting clearance by JPL Document Review and/or the JPL Import/Export Control Office. They will be posted online as soon as clearance has been received, and announced on this web site." Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jul 26 2013, 03:13 PM
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
The elemental composition determined by APXS analysis is derived from APXS spectra.
Two examples of APXS spectra: They show the rsp files apa_401575435rsp00460042100_______p1.csv (this PDS directory for sol 46 APXS RDRs) and apa_411516167rsp01580051954_______p1.csv (this PDS directory for sol 158 APXS RDRs) as diagrams. Transforming the x-ray photon energy (in electron volt) via Z = sqrt(eV / (0.75*13.6057))+1 simplifies the identification of the K-alpha spectral line with the atomic number of the respective chemical element: (See Wikipedia about Rydberg constant, Lyman-alpha line, and Moseley's law) Note the peaks at K-alpha for atomic numbers 16 (sulfur) and 20 (calcium) in the Mavor spectrum. Although some of the x-ray emissions aren't K-alpha. A comparison of Ekwir_1 (29896 seconds counting time) with Snake river (1330 seconds counting time) shows, how counting time influences data quality (logarithmic scale for the counts): |
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