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Susie Slavney

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Susie Slavney last won the day on September 9 2017

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  1. Susie Slavney

    Missing tif files in some LROC CDRNAC products

    I believe the Matlab function "fread" would be the correct way to read a binary file, although I have no experience with Matlab. You will need to know the size and data type of the .img file, which are given in the corresponding label file (.lbl). In the label, look for the keywords LINES, LINE_SAMPLES, SAMPLE_BITS, and SAMPLE_TYPE. For example, for the product at your link above, the label shows LINES = 52224 LINE_SAMPLES = 5064 SAMPLE_BITS = 16 SAMPLE_TYPE = LSB_INTEGER (this means least significant byte first, or little-endian) The label also tells you that the file has 104449 records, each one 5064 bytes long, and the image data start at the second record. So you'll have to skip the first record. RECORD_BYTES = 5064 FILE_RECORDS = 104449 LABEL_RECORDS = 1 ^IMAGE = 2 I am guessing that the Matlab commands would be something like this: fid = fopen('m1185002263rc.img', 'r'); % Open the file to read status = fseek(fid, 5064, 'bof'); % Skip 5064 bytes from the beginning of the file a = fread(fid, [5064,52224], 'int16' 'ieee-le'); % Read in a 5064x52224 array of little-endian signed 16-bit integers Again, I am only guessing about the Matlab commands based on information I found online here. http://matlab.izmiran.ru/help/techdoc/ref/fread.html The image pixels are stored in the file in order from left to right, top to bottom. I understand the fread statement fills the array in column order. So you might have to transpose the array to get it to display correctly.
  2. Susie Slavney

    Missing tif files in some LROC CDRNAC products

    Dear Shyam, To answer your questions: 1. The '.tif' files are reduced-resolution, compressed versions of the '.img' files. They are browse images; that is, they are intended to be used for a quick look at the data to help choose products of interest. They are not suitable for science analysis because the data have been compressed. The actual LROC image products are in the '.img' files, and yes, they can be very large. Each '.img' file has an embedded text header at the beginning of the file that has the metadata for the product, including the size, byte order, and bytes per pixel. You could use this information in Matlab to read in the image. 2. I think there should be a .tif file for every .img file. The one for M1185002263RC is online here: http://lroc.sese.asu.edu/data/LRO-L-LROC-3-CDR-V1.0/LROLRC_1023/EXTRAS/BROWSE/2015120/M1185002263RC_pyr.tif For more information about the image products, look here: - Lunar Orbital Data Explorer's User Manual page about LROC http://ode.rsl.wustl.edu/mars/pagehelp/quickstartguide/index.html?lroc.htm - LROC EDR/CDR Software Interface Specification http://lroc.sese.asu.edu/data/LRO-L-LROC-3-CDR-V1.0/LROLRC_1035/DOCUMENT/LROCSIS.PDF You might want to use the Lunaserv Global Explorer and the Quickmap 3D tools on the LROC web site, http://lroc.sese.asu.edu/archive. If you need more help, I will put you in contact with someone at the LROC Data Node. Regards, Susan
  3. Susie Slavney

    LRO Release 35

    Release 35 of Lunar Reconnaissance Orbiter data is now online at the Geosciences Node. This release includes new data acquired between March 15, 2018, and June 14, 2018, for CRaTER, Diviner, LAMP, LEND, LOLA, LROC, and Mini-RF. Data can be reached from the Geosciences Node LRO page. The Lunar Orbital Data Explorer allows searching and downloading of LRO data.
  4. Susie Slavney

    Mars Science Laboratory Release 18

    Release 18 of Mars Science Laboratory (MSL) data includes new raw and derived data acquired on sols 1870 through 2003.The data are available through PDS web sites, starting at the Geosciences Node MSL page. The MSL Analyst's Notebook is a useful tool for searching, browsing, and downloading MSL products.
  5. Susie Slavney

    Map Tie Error in LROC Images

    Dear Shyam, I have forwarded your question to the PDS Cartography and Imaging Node, where the LROC data are archived, and to someone on the LROC team. I reminded them yesterday that we are still waiting for an answer. I'm sorry for the delay. Susan Slavney
  6. Susie Slavney

    Mars Odyssey Release 64

    Mars Odyssey Release 64 includes new raw data (EDR) , Derived Neutron Data (DND) and Derived HEND Data (DHD) products covering the period October 1 through December 31, 2017. Averaged Neutron Data (AND) and Averaged HEND Data (AHD) products cover the period October 17 to January 26, Ls 75 to Ls 120 in year 09. This release also includes revised EDR and DND data from July 1 to September 30, 2017. The data are online at the PDS Geosciences Node at http://pds-geoscienc...dyssey/grs.html.
  7. Susie Slavney

    MER Release 56

    Data from Release 56 of the Mars Exploration Rover mission is now online at the PDS Geosciences Node. This release includes APXS, Atmospheric Opacity, MI, Navcam, and Pancam data from sols 4861 through 4950 for the Opportunity rover.
  8. Susie Slavney

    Mars Odyssey, GRS instrument suite

    Hi. I suggest you use the Orbital Data Explorer for Mars, http://ode.rsl.wustl.edu/mars/. Choose the Data Product Search tab, and open the Step One options. Select the desired GRS data sets under the ODY (Odyssey) heading. Then narrow down your search by product ID, location, or other criteria in Step 2. You can preview your search results in Step 3, and finally submit your query in Step 4. You can select the products you wish to download from the search results list. If you already know the ID or file name of the products you want, you can download them directly from the archive by following the links at http://pds-geosciences.wustl.edu/missions/odyssey/grs.html. Don't forget to download the PDS label that accompanies each product (*.LBL). It contains useful metadata about the product.
  9. Susie Slavney

    LRO Release 34

    Release 34 of Lunar Reconnaissance Orbiter data is now online at the Geosciences Node. This release includes new data acquired between December 15, 2017, and March 14, 2018, along with some revisions to previously released products, for CRaTER, Diviner, LAMP, LEND, LOLA, LROC, and Mini-RF. Data can be reached from the Geosciences Node LRO page. The Lunar Orbital Data Explorer allows searching and downloading of LRO data.
  10. Susie Slavney

    LRO Release 33

    Release 33 of Lunar Reconnaissance Orbiter data is now online at the Geosciences Node. This release includes new data acquired between September 15 and December 14, 2017, along with some revisions to previously released products, for CRaTER, Diviner, LAMP, LEND, LOLA, LROC, and Mini-RF. Data can be found on the Geosciences Node LRO page. The Lunar Orbital Data Explorer allows searching and downloading of LRO data.
  11. Susie Slavney

    SHARAD EDR Data Released

    SHARAD EDR data from the ASI team members have been posted, covering previous MRO release 43 and current release 44. With this release, the team has recovered data from deliveries that were missed due to a hiatus in ground operations. The EDR data set is now up to date. See ERRATA.TXT for details. The data are available on the PDS Geosciences Node's SHARAD page.
  12. Susie Slavney

    MRO Release 44

    Release 44 from the Mars Reconnaissance Orbiter mission includes new data for CRISM, SHARAD (U.S.), and Gravity / Radio Science. The data are online at pds-geosciences.wustl.edu/missions/mro.
  13. Susie Slavney

    Empriical processing in CRISM data analysis

    Dear Sourabh, Only the CRISM TER and MTRDR derived products have been corrected for spectral smile. See these data product descriptions: http://ode.rsl.wustl.edu/mars/pagehelp/quickstartguide/index.html?crism_ter.htm The CRISM Analysis Tool (CAT) does not have code to do this correction. When we analyze CRISM data using CAT, other than for the two products quoted above, we pay attention to the shift in wavelengths as a function of column number. Note that in CAT, the center wavelengths used in spectral plots are those for the middle column only. CAT can be found at the bottom of this page: http://pds-geosciences.wustl.edu/missions/mro/crism.htm The center wavelength and bandpass file information can be found in: http://pds-geosciences.wustl.edu/mro/mro-m-crism-2-edr-v1/mrocr_0001/document/crism_dpsis.pdf.
  14. Susie Slavney

    Odyssey Release 62

    Mars Odyssey Release 62 includes new raw data (EDR) , Derived Neutron Data (DND) and Derived HEND Data (DHD) products covering the period April1 through June 30, 2017. Averaged Neutron Data (AND) and Averaged HEND Data (AHD) products cover the period March 10, 2017 to July 8, 2017, Ls 330 in year 08 to Ls 15 in year 09. The data are online at the PDS Geosciences Node at http://pds-geoscienc...dyssey/grs.html.
  15. Susie Slavney

    MER Release 54

    Data from Release 54 of the Mars Exploration Rover mission is now online at the PDS Geosciences Node. This release includes APXS, Atmospheric Opacity, MI, Navcam, Pancam, RAT, and Rover Motion Counter data from sols 4681 through 4770 for the Opportunity rover.
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