For data users

hello sir, i am PhD scholar currently working on classification of CRISM data . I have some doubt regarding mica type spectral library ,firstly what is the process of getting numerator I/F AND denominator I/F? secondly ,ratioed i/f corrected spectral profile graph range is different from the spectral profile of my matching image(i am using mtr3 dataset)?

Hello Experts, I would like to learn how to calculate some indices to detect Gypsum and other minerals on Ritchey crater, I decided to start first with the formulations included in "CRISM Data Product Software Interface Specification" (as seen below) to seek out gypsum. However, I didn't clearly understand the syntax of the mentioned formulations, I mean (R, a, b ... etc), I found these formulations more detailed compared to the indices I've calculated before such as NDVI, EVI, SAVI ... (using Landsat8, Spot imageries). Would you please explain to me the syntax of these formulations and what do I need to get started with before diving into this process? …

Hello Experts, After I merged S and L cubes into a single layer, I would like to represent these spectrums (Visible, NIR and SWIR) into a three dimensional cube. I used a "3D cube" tool in ENVI toolbox to do this, then I chose 3 bands from each mentioned spectrum to make a color composite.However, I didn't get the expected result as seen below. Is something wrong? I look forward to your reply. Rochdi.

I noticed that the value range of MTRDR data’s Browse Products is 0-255. So most of the Summary products that extract from the CRISM data are vey small. In my opinion i think the finall summary products may normalized to 0-255 or other treatment methods(For example ,convert original float 32 images to uint 8 images) which i don‘t know. So i want to know what happened. In addition，what is the difference between this processed Browse Products and the original summary products data? What is it’s advantage? Thank you very much!

Hello, I'm wondering where I can find the reference about the Data Filtering CIRRUS algorithm. And do the TRR3 CRISM data need to be denoised again by the CIRRUS algorithm？As far as I know，the TTR3 data have been filtered by the Ratio Shift Correction and Iterative Kernel Filter algorithms. Looking forward to your reply. Thank you.

Hello, I am a PhD scholar exploring water associated morphology and mineralogy of the Martian surface. I am working with L band of CRISM for detection of sulfates in my area. As Leask et al. (2018) have brought forward concerns with possible artifacts at 1.9 and 2.1 micron, I am having difficulty with confirming sulfates in my area. I have analysed radiance data for the same (as suggested by them). But my study area is dust covered so it has a lot of noise and spikes. I have tried ratioing radiance data but CO2 bands still persist. It does show absorption at those wavelength (similar to ratioed I/F) but CO2 absorption at 2.0 micron are big enough to destroy who…

Hello all, I have downloaded an LRO NAC mosaic of the Vikram Landing site(November image) from the following link - http://wms.lroc.asu.edu/lroc/view_rdr_product/NAC_ROI_VIKRAM__LOC_P708S0237_5M I am trying to read the image(.IMG file) on MATLAB and need the following information for subsequent analysis- I couldn't find any label file for the .IMG file and was facing difficulty in reading the data. If it exists, can someone guide me to the link. Is there any way in which I can find out the actual latitude and longitude coordinate of each pixel in the mosaic. The link above for the site only tells the Lat/Long coordinates for the extremes. Al…

Hello, Expert. I have downloaded CRISM TRDR dataset concerning Ritchey crater. Then, I've implemented CAT extension in order to do some photometric and atmospheric corrections as well. As known, the TRDR dataset broken out into two ranges: VNIR (0.3646 - 1.0560) and includes 107 bands. IR (1.0014 - 4) and includes 438 bands. I want to split up those ranges to Visible, Near-infrared and Short-wave infrared into these following wevelength: Visible (400nm to 700nm) Near Infrared (700nm to 1300nm) Short-wave infrared (1300nm to 3000nm) It means if I split up CRISM VNIR range into visible and NIR spectrums, the visible spect…

Hello all, I have downloaded the following LROC NAC CDR files from the Lunar Orbital Data Explorer Node https://ode.rsl.wustl.edu/moon/indexproductsearch.aspx M1328074531LC M1328074531RC M1328081572LC M1328081572RC M1328088614LC M1328088614RC I need to know the latitude and longitude coordinates corresponding to each of the 52224*5000 pixels. The meta data section corresponding to the results on the above link only lists the center and extreme latitude/longitude coordinates. Kindly let me know how to proceed forward. Thanks Ayushman

Hello, I'm getting trouble to implement CAT, ENVI toolbox displays the extension, but when I clicked on it's not working either. I tried to restart ENVI and rebooting the system as well and the extension is not working yet. Any help? Look forward to your reply.

Hello, Experts I've downloaded CRISM data from Orbital Data Explorer to do some analysis on Ritchey Crater, As known, the appropriate directory is TRDR and I chose FRT images depending on the study's goal. Here's an example of a sample I dowloaded: VNIR range: frt0000a0b7_07_if164s_trr3.img frt0000a0b7_07_if164s_trr3.lbl frt0000a0b7_07_de164s_ddr1.lbl frt0000a0b7_07_de164s_ddr1.img IR range: frt0000a0b7_07_if164l_trr3.img frt0000a0b7_07_if164l_trr3.lbl frt0000a0b7_07_de164l_ddr1.lbl frt0000a0b7_07_de164l_ddr1.img The purpose is to seperate these ranges to these following bands (Visible, Near infrared, short wavelength infrared…

Hi! I'm looking to utilize and manipulate Lunar Terrain data for a project I'm working on. For some quick background, I essentially want access to as much lunar terrain data as I can get for a project that takes a Latt/Long coordinate and returns a Map of that area with the chosen terrain data laid on top of it. I understand there are already some similar tools out there, but that is just a high level description of what I want to do. There's a lot more to it that necessitates me needing to develop my own custom app for it. With that being said, I'm still relatively new to some realms of the software world. One of those realms being parsing binary IMG files into…

Hello, I've been struggling with how to process the JP2 images I import into MATLAB. These images are read as int16 types. For example, skyv_65n_240m.jp2 SKYV_65N_240M_JP2.LBL The values of each pixel are a mystery to me. After applying the scaling factor and offset to each DN, the values are still not in steradians. I've tried working with several other LROC LOLA data types (roughness and slope maps), but after reading these JP2 files into MATLAB I end up with wonky pixel values. Any advice is greatly appreciated. Thank you

Hello, Can you point me to where I can find documentation regarding what the value of MISSING_CONSTANT represents? I have checked the RDR SIS, and didn't see anything. It's likely I'm overlooking something. For example, the LDRM_40N_1000M.IMG file shows a MISSING_CONSTANT value of -32768. Is this value meant to fix the OFFSET value? Thank you.

Hello, I've been reading the other posts related to opening .img data and I was specifically interested in opening pancam EDR images in matlab .I was wondering if you knew of any method to do so or if you could point me towards any literature on such a subject.I've read the docs on the analyst notebook page titled Camera Experiment Data Record (EDR) and Reduced Data Record (RDR) Operations and Science Data Products and the SCIENCE EXPERIMENT DATA RECORD (EDR) ARCHIVE VOLUME SOFTWARE INTERFACE SPECIFICATION (SIS) and have an idea of the structure of the .img files and the pds headers but i'm not too sure on how to access the binary image data. Thank…

Hi, I am working with CRISM data on the McLaughlin Crater . I have downloaded following IR dataset images FRT0000CB488_07_IF166L_TRR3 FRT000139F7_07_IF166L_TRR3 FRT000247A0_07_IF166L_TRR3 HRS00006AC4_07_IF175L_TRR3 FRS00029E22_01_IF168L_TRR3 FRS0002B4DA_01_IF168L_TRR3 FRS0002C9DC_01_IF168L_TRR3 FRS0002DB50_01_IF168L_TRR3 FRS0002EF79_01_IF168L_TRR3 FRS0002FF3C_01_IF168L_TRR3 FRS0003134A_01_IF168L_TRR3 FRS00035729_01_IF168L_TRR3 FRS0003640C_01_IF168L_TRR3 FRS0003705A_01_IF168L_TRR3 FRT00009CAE_07_IF166L_TRR3 FRT0000A27C_07_IF166L_TRR3 FRT0000A5AA_07_IF166L_TRR3 …

Hello, I am a graduate student working on mineral analysis using CAT v.7.4 and ENVI Classic v.5.5 + IDL 8.7 (64-bit). I have downloaded and unzipped the following data: FRT0000A7FE_07_IF166J_MTR3 FRT0000967E_07_IF166J_MTR3 FRT0000A2CD_07_IF166J_MTR3 FRT00005C7D_07_IF166J_MTR3 FRT0000A12E_07_IF166J_MTR3 FRT0000400C_07_IF166J_MTR3 FRT0000859F_07_IF166J_MTR3 FRT000096DF_07_IF166J_MTR3 FRT00007DB7_07_IF166J_MTR3 FRT0000A1B5_07_IF166J_MTR3 FRT00008F27_07_IF166J_MTR3 FRT0000A16F_07_IF166J_MTR3 I am trying to follow the processing steps provided in the CRISM 2012 Data Users’ Workshop MTRDR Data Analysis Walk-T…

Hello, I'm attempting to use the MESSENGER GRS PDS data viewer in order to output GRS data into csv files. The software tool is located at https://pds-geosciences.wustl.edu/missions/messenger/grs_software.htm. I downloaded the messenger_pds_viewer_v7-macosx.tgz file and tried to run it, but absolutely nothing happens. The app won't launch. I'm using Java version 8, update 251 on a macOS Mojave version 10.14.6. I read through the softinfo.txt file that is included in the downloaded derived GRS data, and it mentions that the MESSENGER PDS viewer installation requires a Mac OS with a Java 1.6 JRE or newer installed. The "updated" PDS viewer software for GRS data was re…

Hi all - I've been looking to pull data from the LOLA RDR Query tool and I just want to make sure I'm collecting data correctly. My understanding is that between July 2009 and July 2013, more than 6.5 billion LOLA measurements were collected (https://astrogeology.usgs.gov/search/details/Moon/LRO/LOLA/Lunar_LRO_LOLA_Global_LDEM_118m_Mar2014/cub), while running a LOLA RDR Query search on the full Moon with a minimum UTC time bound of 2014-01-01 returns only 432,978 points. Does this seem correct? Many large regions of the Moon appear to not have had LOLA data collected since 2013. I understand that there have been shifts in the lifecycle of the instrument and how it h…

We were contacted by a user trying to read SHARAD EDR data with ReadPDS3 for IDL, but that tool does not read the bit fields and three-byte integers in the data product, and as it is a PDS3 tool it is not likely to be developed further. We suggested the following tools for working with SHARAD data. There was a SHARAD/MARSIS workshop at LPSC in 2014. Presentations are on the Geosciences Node’s web site at https://pds-geosciences.wustl.edu/workshops/sharadmarsis_Mar14.html. There's one by Than Putzig about the CO-SHARPS Processing Boutique, software that reads SHARAD products (not clear if he means EDRs, RDRs, or both) and creates radargrams, among other things. T…

I'm currently doing thermal analysis for lunar landers and would like to use measured surface temperature in a landing zone (which looks like it would be in the level 4 data). What is the simplest way to go about this? Any help if very much appreciated.

Some users of LRO Diviner data have asked why there are some data products with negative temperature values. For example: "I'm exploring the temperature data of the Diviner, I have downloaded TB (Brightness Temperature) data for 6,7,8, and 9 channels and I found negative values (in K) in a few of the images after conversion (TB= (DN * scaling factor) + Offset). This negative value is not possible in K, I'm unable to understand this." Answers from Diviner team members: "The shorter wavelength channels are noisy at low temperatures. Each channel has a minimum temperature below which it becomes noisy. These minimum temperature cutoffs go down with longer wavelength…

Hi, I am trying to use the MSP I/F data from CRISM for spectral analysis. It is of the third version (TRR3). I followed these steps: 1)Convert PDS file to CAT file 2)Photometric correction (divide by cosine of incidence angle) 3)Atmospheric correction using the Volcano Scan technique (default 61C4) However I am yet to do the destriping and despiking for the data cube. I am not sure of which option to use - CIRRUS clean cube or the MRO CRISM Remove Stripes. Additionally, I also found that in one of the workshop presentations, it is not necessary to go for destriping and despiking for TRR3 products. Has anyone here processed MSP TRR3 data or have res…

Hi all, as the title says, how can I remove in a simple way (I wish) this artifact from CRISM cubes?. I'm working with ENVI and CAT, but I'm not an IDL user, so if there exist a simple way to did it, would be really great. Also, how can I project a CRISM mineralogical map into a CTX image and into a DTM (HiRISE) terrain model?. I'm trying with ArcScene but it seems that it is possible with ENVI too. Thanks, Wladimir

Hello My name is Vidyesh Sathe, I am actually working on my Dissertation in Planetary Geology, I am pretty new to Crism Data Set and Analysis of Crism Data. I am using Data set which is frt0001176e_07_if164ds_trr3.img and frt0001176e_07_if164l_trr3.img, i am using both VNIR And IR data. sir I followed the process given in CRISM Demonstration: Data Access, Processing, and Analysis - 3rd Planetary Data Workshop 2012, After pre-processing given in presentation, I wanted to Combine both VNIR and IR data. so i followed standard Envi process which is, Envi-Basic Tool-Layer stacking I imported both map-projected images of VNIR(S) and IR(L). But as the result…