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یک وب سایت از اقدام قبل بارداری تا دوران حاملگی و زایمان و تولد نوزاد و رفتار با کودک
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Assigning Map Information to PDS Images in ENVI
woodiano commented on Jennifer Ward's blog entry in Working with PDS data
Thanks. - Earlier
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ODE - The August 2018 PDS release of MRO HiRISE data loaded into ODE
June Wang posted a topic in Announcements
August 8, 2018 – MRO HiRISE Updates - MRO HiRISE EDR, RDR, DTM and Anaglyph data products released through July 7, 2018 (Orbit 55,999) See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html -
@Ray Arvidson thank you for the replay. I am aware of using ENVI and CAT so I can transform the cube data to the map projection. But I am trying to read the data into Matlab in combination with the MOLA data. But since the cube is distorted (stretched to fit in a cube), I can't align the cube data with the MOLA data. I have also been able to read the DDR file and I got a cube with 14 layers in the 3rd dimension. At layer 4 and 5 I have the latitude and longitude map, but I am not quite sure on how to read them, since the data oscillates a lot. Also to be noted, I am using these functions to read the cube and DDR data and at least the cube data look reasonable, but the DDR data look just uniformly gray with salt and pepper noise on them. Thanks a lot for you help, since I am quite new in the field and I want to understand how to interpret the data I am getting.
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Greetings: I am the Director of the PDS Geosciences Node and also a CRISM Team Member. I believe that the top image you show is one called sensor space, i.e., how the instrument acquires data row after row. The bottom one is map projected. The DDR file has planes that include the latitude and longitude in sensor space, corresponding to the pixel locations of the actual data. Are you trying to project the data to map form? If so would you be trying to do this in Matlab? ENVI can be used with the CRISM Analysis Tool (CAT) to do this for you. But if you need to use Matlab let me know in more detail what you are trying to do and we can help you get there. Ray Arvidson
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Hello, I am currently working with the CRISM Data in Matlab and when I load it, the data is always saved in a rectangular matrix. But since I need the original shape, I need to transform the cube data into it's original form. I have two screenshots how it should look like. I have also been able to read out the DDR file, but I can't find anything on the web on how to use that data. I would appreciate it if someone could help me further regarding this.
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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.
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July 28th, 2018 - More MEX HRSC RDR Version 3 Data Loaded into ODE HRSC new radiometrically calibrated (RDR version 3) image data have been loaded into ODE, with coverage through January 9th, 2017 (Orbit 10-16498). See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html
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July 27th, 2018 Release 9 of MRO CRISM MTRDR (Map-projected Targeted Reduced Data Record), TER (Targeted Empirical Record), and TRDR (Targeted Reduced Data Record) browse and extras data has been loaded into ODE. This release fills in data from 2006_315 through 2007_116. See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html for more information.
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This is the ninth release of CRISM MTRDR and TER data products. In addition, the volume MROCR_2101 is updated with new TRDR browse and extras data products.
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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
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CRISM DATA PROCESSING: CRISM Ratioed I/F Corrected Spectra
Chandan Kumar replied to Chandan Kumar's topic in For data users
Thanks a lot, Dr. Ray Arvidson for your reply and suggestion. I have used the classic version of ENVI & CAT for the processing. -
CRISM DATA PROCESSING: CRISM Ratioed I/F Corrected Spectra
Ray Arvidson replied to Chandan Kumar's topic in For data users
Oh and to remove artifacts in the spectra many scientists ratio the data to a "bland" spectrum from the same column in the data. You just need to make sure that the spectrum you ratio to does not have spectral features that would make some artifacts in the ratioed data. I personally do not do the ratios for this very reason. Ray Arvidson -
CRISM DATA PROCESSING: CRISM Ratioed I/F Corrected Spectra
Ray Arvidson replied to Chandan Kumar's topic in For data users
Hi There. You are doing the processing correctly. The reason that the map projected plot looks different relative to the before projected plot is that the map projected plot has its scale enlarged. It does look like these plots have been made using Classic ENVI and CAT rather than the ENVI5.3 interface and CAT. I so I recommend you switch to the ENVI5.3 interface, much more powerful than the Classic interface. Ray Arvidson CRISM Science Team Member and PDS Geosciences Node Manager -
CRISM DATA PROCESSING: CRISM Ratioed I/F Corrected Spectra
Chandan Kumar posted a topic in For data users
Hi, I need some help to understand the data processing of CRISM data (TRR3). I use CAT tool coupled with ENVI 5.3. I use CAT manual (workshop manual available in the website) for the processing which goes as Conversion of PDS to CAT--> Photographic and Atmospheric Correction--> Georeferencing. I observe that after the atmosphere correction spectra do not change much but once perform the geometric correction it shows changes as shown in the figure. Is obtained result correct? What is the main reason for this change? I would also like to know how to obtain ratioed spectra. I am familiar with spectra ratios but my confusion is how to choose spectra (denominator) which does not introduce errors, what region' pixels would be a better choice? Is atmospherically corrected spectrum same as I/F spectrum? All plots are atmospheric corrected. Thanks, -
MRO CRISM data Processing: Georeferencing
Chandan Kumar replied to Chandan Kumar's topic in For data users
Hi Feng, Thanks for the solution. It works now. Thanks, -
Dear all, Do you need any clarification on the above question to be clear? Thank You, Shyam.
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Hi Chandan, It seems the customized datum is not recognized by ENVI. Would you please check if the three map projection files are in the right place? According to CAT installation document: Set up CRISM Customized Map Projection Move the CRISM customized map projection definitions files (datum.txt, geogcs.txt, spheroid.txt) from the CAT_ENVI\aux_files\crism_projection\ folder to your ENVI installed path inside the idl8x\resource\pedata\user_defined\ folder (the location of user_defined folder may vary based on your ENVI version, idl8x: idl86 for ENVI 5.3 and 5.4; idl87 for ENVI 5.5). If there files are not in the right place, please copy them to related folder and then start ENVI+IDL again. Thanks, Feng
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Hi, I am getting a warning message after the georeferencing of CRISM data. It says that "MRO Custom datum D_Mars_2000_1AU_IAG_Custum_Sphere_lat00 not available. Projection may not match MTRDR. After georeferencing, when I check its details, it appears that DATAM is missing. Kindly help me to tackle this problem? Thanks,
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ODE - The July 2018 PDS release of MRO HiRISE data loaded into ODE
June Wang posted a topic in Announcements
July 15, 2018 – MRO HiRISE Updates - MRO HiRISE EDR, RDR, DTM and Anaglyph data products released through June 6, 2018 (Orbit 55,599) See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html -
July 9th, 2018 Updated Diviner RDR query tool database from July 5th, 2009 to March 15th, 2018.
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Images collected during the Mariner Mars 1969 mission have been restored. This bundle consists of images collected during the Mariner Mars 1969 mission by the Mariner 6 and Mariner 7 spacecraft. The collections have been generated by Thomas C. Duxbury, George Mason University, and funded by the NASA Planetary Data Archiving, Restoration, and Tools program (PDART).
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July 9th, 2018 - More MEX HRSC RDR Version 3 Data Loaded into ODE HRSC new radiometrically calibrated (RDR version 3) image data have been loaded into ODE, with coverage through December 31st, 2016 (Orbit 10-16468). See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html
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July 4th, 2018 - Mars Odyssey Release 64 Data Updates Loaded NS and HEND raw and derived data into ODE through January 26th, 2018 Updated THEMIS standard data products (IREDR, IRRDR, IRBTR, VISEDR, VISRDR and VISABR data) from February 19th, 2002 to December 7th, 2017 Updated THEMIS geometry data products (IRGEO2, IRPBT2, VGEO2, and VISALB data) from September 28th, 2013 to December 7th, 2017 See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html.
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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.
