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#597 Viewing SHARAD 2D radargrams

Posted by Susie Slavney on 13 December 2013 - 11:45 AM

Dear Ranjan,

The SHARAD data are not image files. They are indeed columns of binary numbers. To analyze the data you will need to understand the contents of the files. Here are some places to look, if you haven't looked there already.

 

The primary documentation for the SHARAD data is the Data Product Specification (http://pds-geoscienc...ment/rdrsis.pdf).

 

Each SHARAD data file is accompanied by a PDS label in a separate file with the same name, extension .LBL. The label has information about the size and format of the records in the file, along with metadata about how and when the data were acquired. The PDS labels refer to another label file that describes the columns in detail: http://pds-geoscienc...2/label/rdr.fmt.

 

The JPEG images in the browse directory are created here at the Geosciences Node. The PDS labels for the JPEG images include a description of the algorithm used to read the SHARAD data.

 

And finally, with the permission of the authors, I have posted the IDL scripts that implement this algorithm to create the JPEGs. You may find it useful as a model for reading the data files. See our SHARAD web page, under Tools (http://pds-geoscienc.../mro/sharad.htm).

 

Regards,

Susie Slavney

 


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#570 Possible to get height data from LRO LOLA experiment?

Posted by Susie Slavney on 09 October 2013 - 12:54 PM

The LOLA RDR data set has the latitude, longitude, and radius values for each LOLA measurement. The RDR data are stored as binary tables in the format described by this file:

http://imbrium.mit.e...BEL/LOLARDR.FMT

 

The data are organized in time order in subdirectories by mission phase, here:

http://imbrium.mit.edu/DATA/LOLA_RDR/

 

Please read the LOLA RDR SIS (http://pds-geoscienc...ment/rdrsis.pdf) for a complete description of the instrument's operation and the RDR data product.

 

Susie Slavney


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#273 Workshop Details

Posted by Jennifer Ward on 13 March 2012 - 11:58 AM

The 2012 MRO/CRISM Data Users' Workshop will be held in association with the 43rd Lunar and Planetary Science Conference on Sunday, March 18th, 2012 from 1:00 PM - 5:00 PM in Waterway 2-3 at The Woodlands Waterway Marriott Hotel and Convention Center, The Woodlands, Texas.

The Mars Reconnaissance Orbiter (MRO) Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) has been in operation since late 2006 and has acquired over 20,000 high spatial and spectral resolution targeted observations of the Martian surface. The 2009 CRISM Data Users' Workshop introduced the data set to the community, described data products in detail, and trained attendees on using CRISM-specific software to analyze the data.

At this second workshop, CRISM team members will review significant updates to PDS-delivered CRISM data products including an update to the radiometric calibration of both visible and near-infrared (VNIR) and infrared (IR) observations, and the implementation of a data filtering procedure that addresses systematic and stochastic instrument noise. In addition, a new family of highly derived CRISM data products - the Map Projected Targeted Reduced Data Record (MTRDR) product set - will be detailed and the utility of this product suite for scientific investigations will be demonstrated. The MTRDR product set represents a major advance in the accessibility of CRISM-derived spectral information and is expected to become the CRISM product set of preference for a large portion of the scientific community.

All attendees are requested to REGISTER ONLINE for this event.

Please see the following webpage for additional details: http://crism.jhuapl...._workshop_2012/
Contact: CRISM_Workshop_Web@jhuapl.edu.
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#1283 Scaling Images

Posted by Tom Stein on 29 February 2016 - 10:04 AM

Hi Brennan -

 

  Great questions. The easy one first. There are a couple of ways to access the SIS documents. From the product page (if you are looking at a specific Pancam image, for example), you can click on the blue help icon in the menu bar and select "All Pancam archive documents". That will get you a potentially overwhelming list of all sorts of documents from the archive volumes, such as calibration reports. As noted at the top of the list, the SIS files are in the list under "Documents". The data product SIS is the one you want.

 

Another way to get to the data set documents is from the Resources tab. Click on the "View documents" link and then select an instrument to access associated documentation.

 

Getting the image scale is a little trickier. We are developing a tool to provide distance to rover for most stereo images, as well as the ability to measure distances within the scene and to create elevation profiles. Until that tool is ready (planned for later in March), you can get this information by using the XYL image product that is created from a stereo pair. This three-band image contains the x,y,z position of pixels where there is stereo overlap. You can read more information about this in the data product SIS. You can access XYL and other derived products from the product page by selecting "Derived products and download" from "Product views" in the menu.

 

Please ask if you have more questions.


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