For data users

Hey, I've been using CAT 7.4 for a long time now. I don't know what has gone wrong. A single CRISM cube is taking approx 10 mins to build GLT file ( see screenshot) while projecting, which earlier used to take seconds. I have ENVI 5.6 installed on my i9 processor PC with 64 GB RAM. So, I am sure it's not about hardware. Please, anyone, help as I have a plethora of CRISM cubes to process. Thanks in anticipation!

Hello CRISM Team! I have been using CRISM data for around 2 years and I appreciate the team for providing useful workshops and TRR-V3 data. I am wondering no new workshops have came up for using CRISM data. Recently, I have processed MSP and HSP images (TRDR) of Hellas Planitia region. In HSP dataset, I am getting a lot of bad bands. Though ATP and PHT corrections ignore some bad bands, but after applying these corrections, hsp0002d9a3 is getting worse (Display 2 in screenshot) as there might be more bad bands. Projecting the cube and applying destriping (Display 3 in screenshot) gives unusual results. Similar issues are being faced while processing some ot…

How can we apply correction for aerosols on CRISM data? Is there any option for the same in CAT toolkit?

Hi guys, I am using the CAT tool (latest version, 4/8/20) to map project crism data, I am not getting it right, when I overlay the projected data on a CTX image they do not quite fit. When projecting the crism tr3 image using CAT I get error message shown in the first picture. The CAT instruction at https://astropedia.astrogeology.usgs.gov/download/Docs/PlanetaryDataWorkshop/Presentations2017/Monday/Humphreys/Morgan_CATupdates.pdf tells that " Where do I get those definitions ? Is there some .proj file I have to put into the envi folder/ CAT folder ? The third picture shows the swipe made with a crism image overlain on the CTX image.…

I see that people are able to use Envi for CRISM analysis but I would prefer to use ERDAS as this is what my course has provided. The CRISM data appears to download as .img files and when I view these in ERDAS it says there are no bands in the information. Other systems, such as Jmars or PlanetServer don't meet my needs as I need to crop and buffer the data later in ArcGIS. When I search the problem "analysing CRISM data" the search brings me back to these systems. Can anyone give me advice on CRISM in ERDAS or point me in the direction of materials?

While using CAT toolkit, we go for cleaning (destriping and despiking for IR, and destriping for VNIR) the data. In Data Filtering, there are two alternatives: 1. CIRRUS>Clean spectral cube 2. MRO CRISM Remove Stripes I see generally, CIRRUS method is preferred. What is the science behind cleaning by two methods. And which method should be optimum for me? What if, I do not go for data filtering and simply georeference the image after photometric and atmospheric corrections? Thanks in advance.

For improving the color calibration on my automated site https://areo.info/mar20 I was looking into Perseverance Rover Mastcam-Z raw PDS images. On https://an.rsl.wustl.edu/help/Content/About%20the%20data/Data%20products/List%20of%20data%20product%20types%20by%20instrument.htm#M20 I read about the available raw image format for Mar 2020: ECM: Original Image Product, Possibly Companded (8->12bit) EDR: Decompanded Image Product That's misleading as the ECM file, 8 bit image data, contains the data as received on Earth, which means only the sender-side of the companding process was applied, one of the 32 available 12 to 8 bit LUTs…

I'm searching for software to convert PDS4 .xml/.img from of the Mars 2020 cameras to 16 bit/channel PNG, TIFF or other lossless formatted files. So far couldn't find any which runs on current macOS: NASAView https://pds.nasa.gov/tools/about/pds3-tools/nasa-view.shtml is not available for current macOS, the Java-based transform only writes 8 bit (https://github.com/NASA-PDS/transform/issues/15), the Python PDS4viewer https://pypi.org/project/pds4-tools/ only writes 8bit as well and my years old PDS plugin for GIMP doesn't work on recent versions. The APIs used by transform and pds4-tools are most likely supporting 16 bit already, but before spending time to write my …

Hi, I’m using code that quarry data from the PDS archive, and I wonder if there is a way to utilize Aspera in batch/bash coding in a cluster with or without the Aspera program installed to increase the downloading speed. Thanks Nathan

Hello sir, I am Priyanka Kumari currently working on mineral mapping using CRISM Data. I want to know why MROCR_40001 (MTRDR DATA) Is not available after 2012? I need recent mtrdr data for my current research. can you please help to get MTRDR data from 2015 to 2021?

Hello, How to correctly open and overlay map-projected HiRISE and CRISM products? I know that they both should have the same projection (with different pixel size/map scale/spatial resolution). But, unexpectedly they opened from the first pixel's location of the first opened raster layer and not accordingly and independently by the map coordinates of each rasters. See attached. Thanks, Nathan

Hello, How exactly is each summary product converted to an 8-bit RGB channel component of the browsing product? Is there a code procedure in CAT to use with IDL? Are the values in the summary product at a normalized intensity from 0 to 1? If so then is it only left to convert the values to a range [0, 255]? Thanks, Nathan

Hello, What do I need to define a new mineral Type Locality? How do I search for new minerals that have not yet been defined with a type locality? I thought of calculating the RGB color of a target mineral lab reference spectrum, with related summary products and then looking for pixels in the related Browse Product scene that have a similar color. Is it a good way? If yes, how do I do the band math on a spectrum instead of on an image? And is there a way to do this with the codes from the directory ‘CAT_ENVI\save_add\CAT_programs\Additions\SummaryParams2014’ ? Thanks, Nathan

Answers from the Diviner science team to questions from a Diviner user. Q: The radiance unit mentioned in the lbl file is W m**-2 sr**-1, the term corresponding to frequency is missing. Why is it so? A: Radiance has units of W m**-2 sr**-1 and does not include a frequency term,units of spectral radiance include frequency. Q: How are the BT values calculated from radiance? Are there any preprocessing steps involved in this calculation? Simple calculation using the Planck's function (for the central wavelength) does not match the BT values given in the file. A: The spectral radiance is integrated across the spectral passbands. The Diviner channel spectra…

I want to georeference an M3 image (obtained via PDS) in ENVI. I was following "Assigning Map Information to PDS Images in ENVI", posted by Dr June Wang. I was able to perform most of the steps. Yet when the process is complete, it seems that the georeferencing is not correct. I have attached a couple of screenshots from the M3 image I was working with. To check the accuracy of georeferencing, I cross-checked the location from Google Moon and found that there are a lot of discrepancies between the 'georeferenced' M3 image and Google Moon. In the 'Edit Map Information' window, I entered X-pixel and Y-pixel sizes as 140. Please let me know if this is correct. When I cr…

A user want to use the LP NS special data products for hydrogen abundance at ~15 km/pixel for his research. He want to import it into ArcGIS Pro and run a tool to show only data point with hydrogen signatures > 100ppm since water-ice should be present close to the surface. The link to the archived LPNS data: https://pds-geosciences.wustl.edu/missions/lunarp/reduced_special.html Below is the steps to access the data and do the conversion from an ASCII to a Geotiff in ArcGIS 1) Choose the data. The radius of the Moon is about 1737 km, which means the Moon scale is about 30 km/deg at the equator. scale = radius *2 *pi / 360 So for gridded data at…

Hello, I am a PhD scholar exploring water associated morphology and mineralogy of the Martian surface. While analysing CRISM dataset for secondary minerals in my study area, I have observed a narrow band near 1.2 micron. This feature was observed in at least 3 datasets. I carried out literature survey for clarification regarding this feature. Some studies have attributed this an artifact while others propose it to be a result of (i) fe substitution in plagioclase feldspar (ii) fe-rich/coarse grained olivine (iii) weathering of impact glasses etc. (based on band centre and depth). Can anyone give pointers regarding its classification. Thank you.

Hello There, I'm trying to merge the S (VNIR) and L (IR) into one single cube as discussed in the topic "Complete Near-infrared Spectrum" in the forum. I go along with the following steps: 1- Download the CTX covers the S/L cubes area in ODE (using Geotiff format CTX product). 2- In CAT, do map projection for both S and L cubes. 3- Register map projected S and L cubes to the CTX product by using "Image Registration Workflow". 4- Rename the attached SL_alignment_v5.txt to SL_alignment_v5.pro and open it in IDL, In IDL interface, click "Run', it will ask you select L cubes (results from step 3) , then select S cubes (results from step 3) and output the m…

Hello Explorers, I want to make sure whether the default bad bands algorithm is already applied to TRR3 datasets or not. I noticed that in your useful doc "CRISM Data Users' Workshop Nili Fossae Data Processing Walkthrough". The example of (page 10) shows that before the S (VNIR) TRR2 cube being converted to CAT format, some bad bands have been detected at 0.4um and 0.7um as well while TRR3 version not, in this version it seems like the mentioned algorithm is already applied. If it's so, does conversion to CAT can affect on the future pre-processing analyses (I mean photometric correction, atmospheric correction, etc)? Look forward to your reply, Rochdi Kha…

Hello There, Just to make sure and to erase any doubts I have about the calibrated CRISM directories: TRDR: this CRISM contains hyperspectral targeted observations converted to units of radiance (I/F), divided into two spectral cubes VNIR (s) and IR (L). TER: this CRISM directory includes I/F hyperspectral targeted observations with a full spectral range (VNIR-IR), this directory has been corrected for geometric, photometric, atmospheric, and intrumental effects. MTRDR: Map-projected version of TER directory. Currently, I'm using TRDR directory in my research but I'm still wondering about the most recommended directory for mineral detection. …

Hello There, Should I do "Radiance to IoF" before I convert the PDS CRISM data to CAT? I'm asking this question because I want to analyze the spectral profile of a mineral on Ritchey crater using CRISM L cube data, but I noticed the Y axis missed "I/F" as highilighted in your docs. The graph axes are the following: -> X axis: Data Value -> Y axis: Wavelength (um) Do I really need to apply "Radiance to IoF" first? is this like a "Radiometric Correction" to PDS CRISM data? I used to do this, but an error has occurred said: "The input data is not a radiance" Your help is much appreciated.

HI, Wondering if the Viking Orbiter image data (VISAB) is missing or not loading on the Mars map explorer? It appears that some quadrants are being loaded on the map for the selected High Resolution Mosaicked layer, but the images themselves are not appearing, only the teal transparency. Am I missing some setting or is the data missing? https://ode.rsl.wustl.edu/mars/indexproductsearch.aspx Help or advice would be appreciated. Thank you. Matt

Hello, I am a fourth year Geology student, and for my research project I am doing a comparison of Martian and Terran Alluvial Fans. I'd like to use CRISM data to display the mineralogy of fans in craters. However, the way I was planning on doing this was using ArcMap to show intensity of pixels in bands. I'm not sure if this is a valid methodology and I'd appreciate any advice on how to go about displaying mineralogy. I understand that analysis can be done using ENVI, but I've not had any experience with this. I would also say I'm just about competent in using ArcMap. Thank you!

Hi, I apologize upfront if this is not the right place to ask but I have checked the SEIS documentation already and could not find the details I am looking for. I am working with the Insight SEIS data, mostly VBB 10 Hz (station code =03) and 20 Hz (station code =02) (channels BHU,BHV,BHW) and I am setting up my python code to download the data directly here from the PDS server. The mseed files for the terrestrial days are named as: xb.elyse.'station_code'.'channel'.'year'.'day'.'number'.mseed . Exemplary url: https://pds-geosciences.wustl.edu/insight/urn-nasa-pds-insight_seis/data/xb/continuous_waveform/elyse/2019/042/xb.elyse.03.bhu.2019.042.11.mseed …

We were contacted by a user who are looking at the tectonics and gravity of the Tharsis Rise region of Mars. She mentioned that she has “run into a problem analyzing some PDS data that I can't find a way around. After many days of trial and error (which was not aided by the fact that I have very little computer science experience), I was hoping you might be able to help. I'm trying to view and analyze the GMM-3 Mars gravity models, which are .IMG files (PDS listing). I don't have access to ENVI, so I've been trying alternatives, and have had the most success with the USGS's ISIS software. Now I'm stuck getting the IMG file into an image cube format that ISIS can di…