For data users

Dear all, I have a query that the SHARAD EDR echo data are saved by 8-bit signed integer or 8-bit unsigned integer? such as SHARAD 1689 orbit EDR data. for instance, when we read the EDR data of SHARAD 1689 orbit EDR data, which has two .data files named as e_0168901_002_ss19_700_a_a.dat and e_0168901_002_ss19_700_a_s.dat. We think that e_0168901_002_ss19_700_a_s.dat. file contains the expected echo data and the file e_0168901_002_ss19_700_a_a.dat only just contains the system information as auxiliary description of the echo data. Do we have the right understanding of this EDR data? Therefore we only emphasize on file e_0168901_002_ss19_700_a_s.dat to retrieve the…

Dear all, We now are applying the SHARAD EDR data, in order to test our compression coding technique. Whether we can directly apply the EDR data for achieving the compression coding process or not? Can you tell me what is the compression coding standard technique applied in the SHARAD or MARSIS mission? Thanks for your consideration, we are looking forward to receiving answers from you. Best Regards, Andy

I'm curious if there is available IMU/accelerometer data for MER A/B, while on the ground (not the descent/landing data). I didnt see any through the PDS query. Cheers! -ashton

Hi! I am attempting to display and plot information contained within .img files from the MOLA MEGDRs in an sdl/opengl application of my own design. I'm getting curious results . . . I'm able to distinguish some obvious land forms, the Tharsis bulge, hellas, valles marineris, etc so I know I'm mapping x, y coordinates correctly against long/lat. However, when I attempt to plot topographical data, (the actual values in the .img file at a given location) those features are mired with noise. As it stands, I'm able to switch between the various megt, mega, megr, and megc .img files, convert their values to color information, but they all display noise with varying am…

im having problem customizing cat for latest envi 5 after everything is done as told in cat_setup i couldn't integrate cat with envi5. please help

Hello, I notice that when I use the CAT 7.2.1 - Map Utilities - Project Single Cube Data tool, I obtain a different result than when I use the Build GLT tool in ENVI, with: X Geometry band = Band 5 of the associated DDR Y Geometry band = Band 4 of the associated DDR according to the instructions here on slide 23. http://crism.jhuapl.edu/data/CRISM_workshop_2009/docs/agenda/CRISM_Workshop_090322_Nili_Fossae_Walkthrough_FPS.pdf Looking at the IDL projection_event.pro, I see that the lat and lon keywords are defined as follows: ; Pull some planes from the geofile lat = envi_get_data(fid=geofid,dims=dims,pos=3) lon = envi_get_data(fid=geofid,di…

Hello, This is a very simple question, but I'm having trouble finding any information about this. Am I able to download the CRISM spectral library in order to perform spectral matching for spectra I have no prior knowledge about? I see that crism library data can be downloaded as a zip or tar file, but I am not sure how to handle the .tab files so that ENVI can see them as a library.

Hello, I have just downloaded t0902_mrrsu_05s138_0256_1.img covering Gale crater, and just have some general questions: - Is the coverage for all mrrsu* products typically about 40% of a tile? I wasn't expecting such a large amount of missing data. - Is there any reason why each image strip seems to be individually normalised, but only in some products? For example, the IRAC product seems to have consistent values across the mosaic (I can clearly see the crater from the image), however, other products (mainly single band images, eg R440) appear to have each image strip with different ranges across the mosaic, as do the mrrif* images.

Hello, I'm using MATLAB to load and plot the Galileo SSI .img image files. I'm using the fread function to load the image-files and I then remove the surrounding excess data. My problem arrives when I try plotting the images on the surface. They don't seem to match up and appear to be shifted ~1deg west. In addition, the images seem to fit together better if I flip the images left/right, but I don't know why. In Nasa view, they have a totally different direction. Anybody who can help me? Thanks - Sandy

Hello, Is it normal to see alot of striping within a trr3 image after running the volcano scan? I understand that cirrus operations are not required for most trr3 scenes, but I feel I may need to apply another operation to remove the prevalent striping within the image. However, the cirrus operations produce an image which is completly blank (black). I have been able to reproduce a somewhat similar image shown in the browse product section of the 0000CE1D image by applying the max /min pixel values specified in the the 'Map/Stretch info' section for the 'ir_maf' browse product of the 0000CE1D scene. However, this image also has additional hazy blue lines which do n…

Hello, I am having an issue getting my RBG images to look similar to the IR derived product (ID: 0000CE1D) which shows Mafic minerology from the CRISM data products page. I have converted the image from pds to CAT, performed a photometric correction and performed a volcano scan. Once these corrections were made I created my summary products for the corrected image. I have loaded OLINDEX into the red, LCPINDEX into the green and HCPINDEX into the blue. Areas which have shown up dark purplish blue in the IR derived products page for mafic minerology represent high -Ca pyroxene. However, these areas show up as a bright greenish cyan colour which resembles more of a l…

Hello, I am a student who is very new to working with CRISM and CAT/ENVI software. I am trying to look up the spectral profile of pixels within a CRISM image of the Endeavour crater. The Observation ID of this image is FRT0000CE1D_07_IF166L_TRR3. The image has been converted to CAT from PDS. As well, a photometric correction (division by cos(i)) was applied to the trr3 image prior to looking up the Z profiles. I have not run any other corrections as is has been mentioned in other forums that trr3s have been cleaned before being available to the public. henever I bring up the spectral profile for any pixel within the image the x axis values are shown backwards (3.5 -…

Hi all, Does anyone know how to extract the ground track coordinates from the .dat file and save it seperately in e.g. a .txt file? I've opened the file in NASAview and know it's column 76, 77 & 78 that contains the groundtrack. Normally I'd just use Matlab, but the .dat file is too large for Matlab to handle. I've tried to load & save the columns using e.g. readcol and ddread in IDL but for some reason I do not get the desired output. Does anyone know of another IDL function that can achieve this?

Dear all, The RDR radargram data of such as SHARAD orbit 25019 (http://ode.rsl.wustl.edu/mars/indexproductpage.aspx?product_idgeo=19642615) has been obtained, but we don't know how to compensate the reative offset of ech echo. The common reference time for all echoes is described by keyword MRO:RADARGRAM_RETURN_INTERVAL = 316344 in label file (http://ode.rsl.wustl.edu/mars/indexproductpage.aspx?product_idgeo=19642615) , the shift of the first sample of a given echo from this reference time is reported as RANGE_SHIFT in rdr.fmt file (ftp://pds-geosciences.wustl.edu/mro/mro-m-sharad-4-rdr-v1/MROSH_1002/label/rdr.fmt). How to understand these two parameters and how to …

Hello everyone, I don't know if this is the rigth place to ask this but i have a problem. I have submit a request on Mercury Data Orbital Explorer for MASCS and MLA Data and it seems that the requested was not fulfilled. I selected an area from Lat:15.26, Long:164.24 to Lat:14.71, Long:163.69 and asked for a RDR MLA which producti id is MLASCIRDR1201220114 and when I extract the data I needed, it turns out there were nothing within the box. So I plotted the track to see if it goes until the box and apparently it stop at Lat: ~34; Long:~350 So i wanted to know if you had any idea about how to solve my problem, or some person that I should contact which could help me ha…

Which tools or softwares or applications should be used?

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Dear all, I have a queation that how to read the SHARAD data file with extension .dat such as r_2501901_001_ss19_700_a.dat with r_2501901_001_ss19_700_a.lbl for description, in order to view the 2-D radargrams. The content of this .dat file may be consisted of characters (header of file) and ASCII (radar observations with rows and colums ). This file is download from this link http://ode.rsl.wustl.edu/mars/indexproductpage.aspx?product_idgeo=19642615 Whether the given JPEG radargrams is for showing the radar data which have been compressed and surface-clutter suppression or not? In addition, i can't find the MARSIS orbit 2682 data, maybe the PDS and ESA all didn't …

Hello there, I have recently looked into Gilbert Levin's claim that there is evidence of martian life in the LR data from the 1976 Viking mission. But, after doing some analysis of the data I noticed a problem beyond in the data setshttp://pds-geosciences.wustl.edu/viking/vl1_vl2-m-lr-2-edr-v1/vl_9010/data/vl1c1ht.tab: In each of the experimental HT data frames I notice that there are unexplained peaks in temperature exceeding 50 degrees celsius. This is really strange!! I would like to know the following so that I may be able to replicate the experiment with terrestrial soil: i) What kind of nutrient solution was used? ii) What device was used to measure the tempera…

Hi, How can I open LOLA DEM files for south pole 60m resolution on ENVI. After putting in header information, it gives an error that the file is an invalid PDS file. Kindly Help..! Priya

Hello, Greetings! We are interested in reading the raw LIBS EDR spectra data from Curiosity (ChemCam) that have been released on Feb 27, 2013 at http://pds-geosciences.wustl.edu/msl/msl-m-chemcam-libs-2-edr-v1/. The data are in two parts one with *.lbl extension and the other in *.dat extension. We have tried to read one pair of the ChemCam LIBS EDR data using the latest "readpds.pro" routine in IDL (http://pdssbn.astro.umd.edu/tools/tools_readPDS.shtml); we attempted to read the lbl and dat parts; but in either way; there are error messages that we encounter as shown in the following. Our question is: How can we read these ChemCam LIBS EDR data files in IDL? Which …

Hello, I want to know what is the way in which I can remove surface clutter from SHARAD data for proper subsurface feature analysis. Some code or software, if already present, would be very helpful. Thanks Ranjan

which tools or softwares should be used for Calibrated Monochromatic and Seven-Band Wide-Angle Camera Images(WAC) images to get elevation results from area selected?

If I'm reading search results correctly, only sensor acquisition REMS EDR data is available here. That means I must convert the data given in "counts" to whatever temperature unit I'm interested in (e.g. Kelvin) or pressure units or whatever. Can someone point me to the document that gives guidance on how to do this? Preferably with some info on how calibration of this data works?