pds geosciences node page 1 archiving lcross ground observation data in the planetary data system...
TRANSCRIPT
PDS Geosciences NodePage 1
Archiving LCROSS Ground Observation Data
in thePlanetary Data System
Edward Guinness and Susan SlavneyPDS Geosciences NodeWashington University
St Louis, MO29 February 2008
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Introduction
The PDS Geosciences Node is leading the LCROSS archiving work for PDS.
Why we are here:
– To introduce ourselves
Ed Guinness and Susie SlavneyPlanetary Data System Geosciences NodeWashington University, St. Louis, Missouri
– To introduce the Planetary Data System (PDS)
– To talk about what goes into making a PDS archive
– To answer your questions and help you get started
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What is PDS?
The Planetary Data System’s job is to...
– Provide help to NASA missions and other data providers to organize and document their digital planetary data.
– Collect complete, well-documented planetary data into archives that are peer-reviewed.
– Ensure the long-term preservation and usability of the data.
– Make the planetary data available and useful to the science community.
– Provide assistance to the science community in using PDS archived data.
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What is PDS?
How PDS makes data available to the public:– Data archives reside at the PDS Nodes where they are maintained by scientists who
use the data and who can provide expert help.
– Almost all PDS archives are available online for downloading.
– PDS provides online search tools to help locate data of interest.
PDS Discipline NodesAtmospheres Node, New Mexico State University in Las Cruces, New Mexico
Geosciences Node, Washington University in St. Louis, Missouri
Imaging Node, U.S. Geological Survey in Flagstaff, Arizona and Jet Propulsion Laboratory in Pasadena, California
PPI (Planetary Plasma Interactions) Node, UCLA, Los Angeles, California
Rings Node, Stanford University, Stanford, California
Small Bodies Node, University of Maryland, College Park, Maryland
PDS Support NodesNAIF (Navigation and Ancillary Information Facility) Node, Jet Propulsion Laboratory
Engineering Node, Jet Propulsion Laboratory
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Components of a PDS Archive
Required:
– Data products with PDS labels
– Index of data products
– Documentation
• PDS catalog information• Other documentation
Optional:
– Calibration data and reports, used to understand how to generate derived products
– Software to read the data, if needed
– Extra material
• Quick-look or browse versions of data• Analysis software
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Components of LCROSS PDS Archives
• The LCROSS Science Team will submit 18 data sets to PDS:
– Nine science instruments
• 1 Visible Context Camera, 2 Near-Infrared Cameras, 2 Mid-Infrared Cameras• 1 Visible Spectrometer, 2 Near-Infrared Spectrometers• 1 Total Visible Luminance Photometer
– Two data sets per instrument
• Raw data products • Derived (calibrated) data products
• Data sets will include:
– PDS-labeled data products
– Index tables
– PDS catalog information
– Data Product Software Interface Specification
– Archive Volume Software Interface Specification
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Components of Ground-Based Observation Archives
• Because ground-based observations are not mission-derived, the archive requirements can be simplified.
– Data products in PDS-preferred formats with PDS labels
– PDS catalog information, including a data set description
• If an observatory has archived data with PDS before, some information is already in the PDS catalog.
– Additional documentation as needed
• What are PDS-preferred formats?
– PDS images as simple binary arrays, without proprietary headers or formats
– FITS images are acceptable with some limitations
– Tables in plain ASCII text (preferred) or binary
• Peer reviews
– Review data sets as a group, rather than a separate review for each one
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What We Do With Your Data
• LCROSS ground-based observations will be considered a PDS Data Set Collection, all archived together at the Geosciences Node.
• The collection will be available for downloading from our web site (pds-geosciences.wustl.edu).
• The Orbital Data Explorer (ODE) search tool, now available for Mars orbital data, will be expanded to search lunar data including LRO and LCROSS.
– Try ODE on Mars data at ode.rsl.wustl.edu/mars/.
– To enable useful searches on LCROSS ground-based data, consider what common metadata should be included in each data set.
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Resources
• PDS Main Web Site: pds.nasa.gov
• PDS Geosciences Node Web Site: pds-geosciences.wustl.edu
• How-To documents:
– Proposer’s Archive Guide (PAG), pds.nasa.gov/documents/pag/
– Archive Preparation Guide (APG), pds.nasa.gov/documents/apg/
Both documents are directed toward mission-generated archives.
• Tools:
– Label Design Tool (LTDTool) version 1.0 to be released soon; beta version now available. Ask us.
– Label Validation Tool (Vtool) version 1.1.0 now available at pds.nasa.gov/tools/software_download.cfm.
– PDS Data Dictionary Lookup Tool online at pds.nasa.gov/tools/data_dictionary_lookup.cfm
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Resources
• OLAF – Online Archiving Facility at the PDS Small Bodies Nodesbn.psi.edu/olaf/
OLAF allows online automated submissions of spectra, time series, and other data in ASCII tables, and images in FITS format.
• Examples of observatory-based data sets in PDS
– Lunar radar map – pds-geosciences.wustl.edu/missions/lunar_radar/
– Lunar spectroscopy – pds-geosciences.wustl.edu/missions/lunarspec/
– Shoemaker-Levy 9 archives – pdssbn.astro.umd.edu/sgnhtml/comets/SL9/
• Contact us:
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Susie [email protected]