For data users
Questions and comments related to locating, accessing, and using PDS Geo data
182 topics in this forum
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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?
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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?
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what tools should be used to extract data from Moon Mineralogy Mapper to find mineral signatures?
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Hello, I'm new to SHARAD data and facing problems viewing the 2D radargrams. I have tried to open them with NASAView but it is only showing me columns of numbers. I tried to open the images with ENVI but even with different combinations of header offset, columns and rows, I am not able to view the radargrams. The browse images are there, but to analyze the images I need to view them in ENVI. Could someone please tell me how I might be able to visualize the radargrams in ENVI? (A sample header file for a SHARAD rdr file would also be very helpful). Thank you! Ranjan
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I am looking for height data, given as (latitude, longitude, height from centre of moon), for each point on the moon's surface. In the GDRDEM files, I only found height data of the moon which was projected onto a flat surface. I need the height values to remain unprojected - e.g. the shape of the moon is still a 3 dimensional globe. Is there a data set which has this height data?
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Hi, I'm working on planetary gravity field and I'd like to use th UTDF tracking data of LRO for the computation of the s/c orbit and gravity field computation. However, I sued to use the ODF format for the Doppler and range data files and I don't know how to handle UTDF. The 2 formats seem closed but do someone know how to transform UTDF 2 ODF or have a tool to read UTDF format ? thanks in advance Agnes
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Hello, I'm trying to locate mineral clusters in CRISM I/F data using a Self-Organizing Map, but ultimately, even though I normalize the data prior to running a SOM my output clusters correspond with bright and dark areas. I am working with GRASS and R, so here are my processing steps: - import CRISM data into R, each pixel contains a vector of 254 values corresponding to the I/F values in the first 254 image bands. I am now working with a matrix, of n rows (number of pixels in image) by 254. This CRISM data has previously been though the CAT pre-preprocessing pipeline. - Calculate the mean value of each pixel, so that each pixel is now a residual…
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I'm a student and I'm intersting the lunar Prospector Gamma Ray Spectrometer data. I have downloaded the dataset. Unfortunately , I haven't been able to find a way to read the data set , and I have not find the format about the data. Any help would be greatly appreciated. Thanks!
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I'm a student and I'm intersting the lunar Prospector Gamma Ray Spectrometer data. I have downloaded the dataset. Unfortunately , I haven't been able to find a way to read the data set , and I have not find the format about the data. Any help would be greatly appreciated. Thanks!
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Hello, I am currently working on reading the UVL (linearised) UVW (XYZ) Surface Normal files, so as to get an idea of rock/soil facet orientations. I have developed a Matlab code to read these files with their main IEEE4 binary encoded data. I was wondering if there was anywhere where I could read more on these types of files and how to interpret them. For example I'm getting, for a specific pixel, in the three bands: band1: 0.06 band 2: 0.25 band 3: 0 and I can't work out what they are. Are they values in the three axis XYZ that define the surface normal vector? , in that case , in what coordinate frame are they determined?…
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I'm completely new to this field and trying to engage in some self-study through a personal project. I'm trying to determine if it is possible to generate a heightmap using data captured by the LOLA instrumentation on the LRO mission that can be imported to a 3D modeling tool to generate a terrain mesh mirroring the lunar surface. If it is possible, could someone please point me to subject areas I need to be reading up on to be able to understand the data/process better? If it is actually possible and I'm able to generate a terrain mesh I'd like to see if its possible to apply high resolution imagery captured as a texture to the created mesh. All the whi…
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Hello, Apologies for an elementary and probably ill-posed question. I'd like to use the lunar surface temperature data (so far I've been looking at DLRE GDR-L2 at various channels 1-7 & TBOL in level 3) for lesson purposes on determining the basic energy balance and temperature of planets/moons. I'm looking for some representative surface temperature data showing the large gradients in temperature between, e.g., the equator at noon and nightime, as well as a function of latitude. I can combine datasets obtained from multiple time intervals, but evidently I'm not understanding the data search completely, as some files have images of lunar temperatures (in the …
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Hello, I'm interested in the opinions of Mars researchers concerning following: If there is little dust in the Mars atmosphere, the near-horizon martian (northern hemisphere) sky during early spring seems to look jasmine (yellow with a little orange). The color appears to change to gridelin (dark violet grey) as the distance above the horizon increases, becoming darker as the view moves toward the zenith of the martian sky. As spring turns to summer some photographs give the impression that the jasmine color becomes less prevalent, now the jasmine to gridelin color change looks like it occurs much nearer the horizon. During the autumn season (northern…
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Hello, I'm trying to find color pictures of the martian terrain with sky that show the natural colors for each Mars season. For southern hemisphere late winter I found a suitable picture that includes the date and time the picture was taken, along with the "natural" colors. See link bellow: http://an.rsl.wustl.edu/msl/mslbrowser/pia.aspx?pia=PIA16800 Unfortunately, I have not been able to find anything provided by Curiosity for the seasons (sol = time in martian "days" Curiosity has been on planet) : Spring (≈ sol 40 to 184); Summer (≈ sol 185 to 322); and Autumn (≈ sol > 322). I need the date and time a picture was taken in order to determi…
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Dear All, As I am working in Planetary Sciences, I use hyperspectral imagery for analysis of spectral characteristics of minerals in extra - terrestrial body. I found that CAT_ENVI extension is useful for such analysis. I did download and tried to install as per the instruction found in http://pds-geosciences.wustl.edu/missions/mro/crism.htm I am using ENVI 4.7 with IDL 7.1 in Windows 7. I added command lines as per given in the user guide. There was no errors while i Installed. But I couldn't find the 'CAT_ENVI' tab in ENVI menu. Can anyone suggest me how to solve this issue. Many thanks in advance. Regards, M…
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Hello, Greetings! We would like to know the local latitude/longitude coordinates of the Mars Curiosity rover at the time its ChemCam instrument collected the LIBS spectra and its APXS instrument collected APXS spectra data; how can we find this information? Thank you!
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Hello, I've created some CRISM IR summary products using the CAT and am visualising them in combination with a HiRISE image. To highlight areas with the largest spectral response, in OLINDEX for example, I have read that typically stretching is performed using zero as the minimum realistic value and the 99th percentile as the maximum. The range of the OLINDEX parameter is very small: Minimum -0.107, Maximum: 0.084, so Adjusted Min: 0, Adjusted Max: 0.043. I was wondering what the typical expected values for these parameters are. What constitutes a significant response? For example, my 99th percentile value is 0.043 but this might still be a very small respon…
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Hi there, I have installed CAT7.2 on both centos 6 (ENVI 4.7) and win XP (ENVI 4.8), when I try "clean spectral cube" for the atmospheric corrected data (HRL0000D2E5_07_IF180L_TRR3_CAT_corr.img), it shows "Destripe Error" ( No good data in HRL0000D2E5_07_IF180L_TRR3_CAT_corr.img Aborting Destripe.) I tried the one in 09 workshop (FRT000064D9_07_IF166L_TRR3_CAT_corr.img), and it shows the same error. I chose "Empirically optimized for this observation" for atmospheric correction. BTW, which vocanic scan method is recommended? Thanks! Jun
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have a question regarding the SHARAD RDR products. I noticed that the rdr.fmt file describes several geographic parameters in each data record. http://pds-geoscienc...1/label/rdr.fmt Specifically, I see the SUB_SC_PLANETOCENTRIC_LATITUDE and SUB_SC_EAST_LONGITUDE. I realize that this point may not coincide completely with the actual footprint of SHARAD on the surface. That depends on how far off nadir the instrument aims. Does SHARAD acquire data sufficiently off nadir such that I need to apply SC_YAW_ANGLE, SC_PITCH_ANGLE and SC_ROLL_ANGLE to determine the Mars surface intercept points? Are the ground intercept points perhaps described els…
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Hi all, Greetings! In the PDS node (http://geo.pds.nasa.gov/missions/mro/sharad.htm), for the Derived Data Products (DDR), the lbl files hold the information for the data file). In the lbl files, there are for values for the latitude and longitude: MRO:START_SUB_SPACECRAFT_LONGITUDE = 97.749998 <DEG> MRO:START_SUB_SPACECRAFT_LATITUDE = -24.689301 <DEG> MRO:STOP_SUB_SPACECRAFT_LONGITUDE = 95.934470 <DEG> MRO:STOP_SUB_SPACECRAFT_LATITUDE = -37.625862 <DEG> However, if one observation has a very large latitude range (say 30 - 50 degrees), using only two points (start and end) can not show the accurate ground trac…
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Hello, I apologise if this is an extremely obvious question, but I'm very new to using CRISM data. I am using CAT v6.6 to process the frt00004af7_07_if164l_trr3.img of Hale crater while following the CRISM walkthrough tutorial of Nili Fossae from crism.jhuapl.edu/CRISM.../CRISM_Workshop_090322_Nili_Fossae_Walkthrough_FPS.pdf. Is it normal after completing atmospheric correction using the optimum wavelength volcano scan method, to still have an obvious CO2 absorption feature from 1.9-2.1 µm? If I then take a spectral ratio s1/s2, no recognisable spectral signature is apparent - as in the tutorial. Regards, EJA.
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In this website "http://ode.rsl.wustl.edu/moon/indexproductpage.aspx?product_idgeo=13872107" I can not find a projection file, so I find in another place "http://ode.rsl.wustl.edu/moon/DataSetExplorer.aspx?target=mars&instrumenthost=LRO&instrumentid=LROC&datasetid=LRO-L-LROC-5-RDR-V1.0&volumeid=LROLRC_1001GDR&pathtovol=catalog/" "dsmap.cat"---this file support the equation form (Sample,line) to (Lat,Lon) (POLAR STEREOGRAPHIC ), but when I use these equations to compute, The result is wrong, I can not get correst Lat and Lon.
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Hi,everyone I have get some spectral profile from the CRISM data.I have tried using the SAM(Spectral Angle Mapper),SFF(Spectral Feature Fitting),or BE(Binary Encoding) method in the ENVI4.8's Spectral Analyst module.But when I view the profiles of identification result and the original to-be identified minerals in ENVI4.8,they display very differnent spectral shape(e.g.the band depth and the absorption location).So I can not determine which type they belong to.Does any one has some tips on identifying the mineral. I apologies for the following long text ,but the forum can not upload any attachements.I have no choice but to paste the to-be discerned miner…
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I first wanted to say how impressed I have been by all of the support material and software for CRISM. I really appreciate all of the hard work that everyone has done, especially as a new user. My question regards the bad bands list. I have been following the Nilli Fossae walkthrough while processing a set of data from Ganges Mensa. The processing works well until the step where I clean the spectral cubes. The first time that I tried processing a cube, the software failed. I determined that there were some bands that had a lot of values of 65535 throughout the image and not just on the left side. By editing the bad bands list to exclude these bands, I can get…
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Hello, I'm interested in the roughness of the Moon and am currently using the "LRO-L-LOLA-4-GDR-V1.0", "LDRM_16" surface roughness data. I have read the attached .lbl files describing the data however I'm still a little confused as to how the roughness is measured. Please can someone give me a hand? My understanding at the minute is that a plane defined by three points ( 3 of the 5 LOLA footprint spot pattern) is compared to the plane fitted to either 5 points (1 LOLA footprint), 10 (2 LOLA footprints) or 15 (3 LOLA footprints). The standard deviation of the three-point plane from the "overall" plane is then converted into a roughness measurement in metres. …
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