HR: 17:00h
AN: SF34A-05    [Abstracts]
TI: Innovative Web-Based Tool for the Mars Odyssey THEMIS Science Dataset
AU: * Mehall, G L
EM: mehall@asu.edu
AF: Arizona State University, Department of Geological Sciences, Mars Space Flight Facility, Tempe, AZ 85287 United States
AU: Christensen, P R
EM: phil.christensen@asu.edu
AF: Arizona State University, Department of Geological Sciences, Mars Space Flight Facility, Tempe, AZ 85287 United States
AU: Gorelick, N S
EM: gorelick@asu.edu
AF: Arizona State University, Department of Geological Sciences, Mars Space Flight Facility, Tempe, AZ 85287 United States
AU: Jones, R B
EM: brad.jones@asu.edu
AF: Arizona State University, Department of Geological Sciences, Mars Space Flight Facility, Tempe, AZ 85287 United States
AU: Murray, K C
EM: kim.murray@asu.edu
AF: Arizona State University, Department of Geological Sciences, Mars Space Flight Facility, Tempe, AZ 85287 United States
AB: The Mars Space Flight Facility at Arizona State University (ASU) is responsible for the operation and data processing, analysis, and validation for several NASA science experiments currently in operation at Mars. These experiments include the Mars Global Surveyor Thermal Emission Spectrometer (TES) and the Mars Odyssey Thermal Emission Imaging System (THEMIS). As a Data Node for the NASA Planetary Data System (PDS), the ASU team is also responsible for the distribution and archiving of the science data from these experiments. Previous PDS data distribution methods were based on non-volatile media storage, and distribution to the science community via mass-mailings. However, due to the increase in data volumes for recent science experiments, the PDS is now pursuing new ways of distributing these larger datasets. The ASU mission operations team has led the way in the development of web-based interfaces for the TES and THEMIS PDS datasets. The TES web-based data interface is a simple indexed version of the PDS CD-ROM volumes along with supporting documentation. This interface was developed to support the increasing data volumes (8,820 products, 210 volumes, 126 Gbytes) from the experiment as it entered into its extended mission phase in 2001. Although the TES data interface is simple, it was an early attempt to provide a convenient online interface of a science data archive to the community. The THEMIS camera on the Mars Odyssey spacecraft has acquired a large number of infrared and visible images at Mars, resulting in a data volume far greater than previous PDS data archives (246,365 image products, 1,566 Gbytes). Due to the size of this dataset, a more innovative approach to an online data archive had to be developed. The THEMIS web-based data interface (http://themis-data.asu.edu) provides an intuitive and powerful interface to this dataset and the supporting documentation. Users can utilize a form-based database interface to identify images that match specific criteria or select individual image footprints on a graphical map that provides pan and zoom capabilities. For each selected image, a page is dynamically generated that provides a number of browsing features and online processing options, as well as links to download the PDS compliant standard data products. A clickable thumbnail of the selected image is displayed along with a context image and all ancillary data. Options allow the user to select the context image of the region, cut from a variety of base maps including MOLA, MOC, TES thermal inertia or albedo, and THEMIS infrared mosaics. Users can browse each band of a multi-band image and apply some basic processing to it online before saving it in one of several standard image formats. Georectified versions of the multi-band PDS data products can also be downloaded in a variety of formats, allowing them to be ingested directly into popular processing packages such as ESRI, ENVI and VICAR. This tool is continually being improved as additional user requests are received. The THEMIS web-based PDS data interface has received numerous positive reviews from the science community and serves as a benchmark for future Mars experiments.
UR: http://themis-data.asu.edu
DE: 9810 New fields (not classifiable under other headings)
DE: 9820 Techniques applicable in three or more fields
DE: 5464 Remote sensing
DE: 5494 Instruments and techniques
DE: 6225 Mars
SC: Special Focus: Advances in Data Acquisition, Management, Analysis and Display [SF]
MN: 2004 AGU Fall Meeting