Data Set Information
DATA_SET_NAME EARTH BASED CANON REBEL XT LVL IMAGES OF MARS ANALOGS V1.0
DATA_SET_ID EAR-E-REBELXT-7-IMAGE-MARS-ANALOG-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : This dataset represents a library of images of potential martian analog features and materials, taken at 10 micrometer/pixel resolution, approximately at the scale of a geologist's handlens. The purpose of this library is twofold: (1) to characterize some important martian analogs; and (2) to provide a convenient tool for the community to access those data for comparison. The library consists of 271 images at 10 micrometer/pixel taken in situ at eleven locations: Skeidararsandur, Iceland; Lanai Lookout, Hawaii; Tantalus Formation (Koko Crater), Hawaii; Kau Desert, Hawaii; Kilauea Iki and Halemaumau Crater, Hawaii; Deschutes Formation, Crooked River Gorge, Oregon; Fort Rock Tuff Ring, Oregon; Hole-in-the-Ground Maar, Oregon; Lava Butte, Oregon and Big Obsidian Flow, Oregon. Materials in each image are described by the following characteristics: grain size range and average; grain roundness range; grain sphericity range; grain texture, sorting, fabric, orientation and packing; sedimentary structure; and a list of prominent grain colors. The library is searchable by any of these characteristics. Ancillary data include geologic context data and context images of all sample locations at centimeter- and meter-scale resolution. The latitude, longitude and elevation of each sampling location, where known, are also recorded. For more detailed information regarding the purpose and scope of the library, please see [YINGSTETAL2008] and [YINGST&KUHLMAN2009] as listed in the REF.CAT document. Data Acquisition : Images were collected in situ at field sites in nine regions: Skeidararsandur, Iceland; Lanai Lookout, Hawaii; Keanakakoi Ash Beds, Hawaii; Kilauea Iki, Hawaii; Deschutes Formation, Crooked River Gorge, Oregon; Fort Rock Tuff Ring, Oregon; Hole-in-the-Ground Maar, Oregon; Lava Butte, Oregon and Big Obsidian Flow, Oregon. Formations of interest were imaged for context at meter- to centimeter-scale, then features identified as most analogous to specific martian features were imaged at ~10 micrometer/pixel. Because of the set-up time required, a large number of image stacks of each individual feature could not be produced. Instead, the goal was to summarize as completely as possible the unique or diagnostic microscale details of each feature or unit, which necessitated sacrificing depth of imaging for overall imaging coverage. Additionally, rather than attempt to model the variations of illumination that occur under natural lighting, images were acquired under the artificial illumination of a light ring. Where stability of the camera could not be achieved otherwise, the camera was mounted on a tripod prior to acquiring images. Materials imaged at 10 micrometer/pixel (handlens-scale) were characterized for grain size, roundness, sphericity, texture, color, sorting, fabric, orientation and packing. Any sedimentary structure was also described. For more detailed information regarding the instruments used in data acquisition, please see [YINGSTETAL2007], as noted in the REF.CAT document, as well as the summary in the INSTRUMENT.CAT document. Data Organization : All images in this data set are found in the DATA subdirectory. Primary image data products have file names beginning with IMG_. Most primary images have associated meter-scale and centimeter-scale context images, whose names begin with MIMG_ and CIMG_ respectively. Many primary images also have associated ancillary image files, whose names begin with AIMG_. Each primary image, context image, and ancillary image is described by a detached PDS label in a separate file with the same name, extension LBL. PDS labels are text files written in a keyword:value format. The PDS label for a given primary image includes references to its context images and ancillary images. Each primary image is associated with description files found in the DOCUMENT directory. The primary image's PDS label includes pointers to these description files. The file INDEX.TAB in the INDEX directory is a table of all primary images in the archive. It includes a great deal of information about each image, including sample characteristics, location, and related context images, ancillary images, and descriptions. This table is suitable for loading into a spreadsheet or data base program (such as Microsoft Excel) for searching.
DATA_SET_RELEASE_DATE 2009-11-15T00:00:00.000Z
START_TIME 2006-08-21T11:32:42.000Z
STOP_TIME 2009-04-20T01:33:23.000Z
MISSION_NAME
MISSION_START_DATE
MISSION_STOP_DATE
TARGET_NAME EARTH
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID
INSTRUMENT_NAME
INSTRUMENT_ID
INSTRUMENT_TYPE
NODE_NAME Geosciences
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Review : This data set is subject to PDS peer review. PDS accepts only those data sets that have passed a peer review with all liens resolved.
CITATION_DESCRIPTION Yingst, R.A., Mars analog handlens-scale image database, EAR-E-REBELXT-7-IMAGE-MARS-ANALOG-V1.0, NASA Planetary Data System, 2009.
ABSTRACT_TEXT Collection of hand-lens-scale images of Mars-analog materials and associated measurements.
PRODUCER_FULL_NAME R. AILEEN YINGST
SEARCH/ACCESS DATA
  • Geoscience Online Data
  • Mars Analog Data Browser
  • Geosciences FTP Resource
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