planetary science archive (psa) and pds introduction vex / mex data workshop 27 th june to 1 st july...
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Planetary Science Archive (PSA) and PDS Introduction
VEX / MEX Data Workshop
27th June to 1st July 2011
ESAC
Dave Heather ([email protected])
PSA PDS Overview |27/06/2011 | Slide 2
Planetary Science Archive
• Available since March 2004:• http://www.rssd.esa.int/PSA
• Active development, PSA 3.0 to come in December
• PSA Data Handling Team @ ESA-ESAC (Spain)• David Heather lead• Archive Scientist, setting up the requirements• Interface with Instrument Teams • Validating Data Sets
• PSA Development Team @ ESA-ESAC (Spain)• Christophe Arviset lead• PSA systems software development
PSA PDS Overview |27/06/2011 | Slide 3
PSA Definition and Purpose
The Planetary Science Archive (PSA) is the initiative, the setup, the process and the implementation to preserve data from ESA’s spacecraft to planetary bodies, as well as supplementary information acquired in laboratories or ground-based observatories.
The main objectives of the PSA are: to support the experimenter teams in the preparation for the spacecraft and ground-based long-term archives
to enable and ensure the long-term preservation of these archives
distribution of scientific useful data to the world wide scientific community
provision of supplementary data services aiming to maximize the usage of planetary mission data and ease the scientific data analysis.
PSA PDS Overview |27/06/2011 | Slide 4
PSA : one archive, several missions
Mars Express
Rosetta
Smart-1
GiottoHuygens
VenusExpress
ALL IN PDS FORMAT
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Current Status, Available Datasets
GIOTTO data from comet Halley and Gripp-Skellerup
Comet Halley ground-based observations (Halley-Watch)
Comet Wirtanen ground-based observations
Mars Express instrument and auxiliary data (ongoing)
Venus Express instrument and auxiliary data (ongoing)
Smart-1 instrument and auxiliary data (pending)
Rosetta instrument and auxiliary data (ongoing)
Huygens (complete)
BepiColombo data handling and archive support – in preparation
ESA supported instruments on Chandrayaan 1 – pipeline development and support from PSA
PSA PDS Overview |27/06/2011 | Slide 6
The PDS Standards
• All PSA data are compliant with NASA’s Planetary Data System (PDS) Standards
• This is the first step in ensuring that the data stored in the PSA are as widely usable as possible and will remain so for many years to come
• Widely accepted and understood within the planetary science community
• Standards available online and downloadable as a ‘Standards Reference’ pdf file.
Within the PDS Standards, data are organized into volumes and data sets, collecting together observations of similar type, processing level, and/or from a specific mission phase or observation campaign.
PSA PDS Overview |27/06/2011 | Slide 7
The PDS Standards
All PDS compatible data formats conform to a unified standard format incorporating documentation, calibration, and raw and processed data files.
Meta-data Files At the intermediate level
are files which describe the circumstances and parameters of the data collection (for example: the instrument used, the observatory site, the type of data collected, etc.). These files are called "catalog objects" or just "catalog" files.
Volume/Dataset Description Files These files are included on any
distribution medium intended to be an entire, self-contained archive - for example, a set of DVDs or a ZIP file. The volume description files detail the organization of the data in the archive (in terms of directories, e.g.) and any additional documentation and software which might be included.
The format distinguishes:
PSA PDS Overview |27/06/2011 | Slide 8
The PDS Standards
The lowest level is that of the data themselves.
• Each file will have a PDS label either appended to the beginning of the file or, more often, in a separate but proximate file. "One file, one label" is the general rule.
The LBL file must contain a full description of the data object(s)
• Allows for all PDS products to be read by existing standard software
• Allows for long-term data usage with clear description of data to allow users to read files with their own software
PSA PDS Overview |27/06/2011 | Slide 9
PDS Resources
http://pds.jpl.nasa.gov
More information on the PDS and complete versions of the Standards Reference and Data Dictionary
The Data Dictionary can be found here
Supporting Software Tools can be downloaded here
PSA PDS Overview |27/06/2011 | Slide 10
A Few PDS Tools
http://pds.jpl.nasa.gov
Go to the Tools menu
NASA View
A useful tool for visualising labels and simple small data products
PDS Software Tools
Some general tools reading tables and manipulating PDS files.
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NASA View Example
NASAView can open simple PDS compliant data
Click on File -> Open Object and select the product you want to see
You can also click on Label -> Full Label to view the complete PDS label with full information on the data product being viewed
PSA PDS Overview |27/06/2011 | Slide 12
ReadPDS
ReadPDS is an IDL package that is maintained and distributed by PDS's Small Bodies Node (SBN). It allows most PDS compliant products to be read in to the IDL software.
To retrieve the latest fully tested release or previous releases, check out the page:http://pdssbn.astro.umd.edu/nodehtml/software.shtml
Within your IDLDE, select the File->Preferences and check that your path contains the ReadPDS.
PSA PDS Overview |27/06/2011 | Slide 13
ReadPDS 2
To run the ReadPDS you also need to have the astrolib library installed. If not already done, you can retrieve the astrolib library at
http://idlastro.gsfc.nasa.gov/ . Read the aareadme.txt file distributed with the ReadPDS package.
There is no further way to test your installation than to call a procedure within IDL. So, on your IDLDE command input, enter e.g.:
If the routine READPDS is compiled successfully, your installation is ok.
PSA PDS Overview |27/06/2011 | Slide 14
PSA Standard User Interface
• User friendly web access : Java Applet • http://www.rssd.esa.int/PSA
• Powerful queries, organized by panel• General query panels• Mission / instrument specific panels
• Hierarchical data presentation• 1 Dataset -> several data products
• Public data accessible to all, proprietary data accessible only to privileged users
• Images preview (icons, full image)
• Quick download (1 click) at various processing levels, shopping basket retrieval
PSA PDS Overview |27/06/2011 | Slide 15
PSA Mars Map Based Interface
• Interface for Mars Express image data• http://www.rssd.esa.int/PSA• Java Applet• Currently HRSC and OMEGA
• No need to be an expert• Easy for general public
• Area selection by mouse• Display images footprints
• Image download by 1 mouse click• Some are big (be patient! )
• Go back and forth to the standard interface to refine search parameters
PSA PDS Overview |27/06/2011 | Slide 16
PSA UI – The Map Interface
Select Base Map Type (MOLA / VIKING…)
Zoom function
Select Instrument / Detector
Long / Lat information
Search Button
Access to ‘standard’ UI
4. Download directly or view label / docs etc.6. Return to the map
browser, you can finish your search as required.
1. Click and drag to select your area of interest
2. Press ‘Search’ and wait for footprints
3. Click on desired footprint
5. Transfer at any time to the standard interface for advanced searches. Your search parameters will be remembered.
PSA PDS Overview |27/06/2011 | Slide 17
PSA Data Set Browser Interface
Opening ScreenClick on the instrument
that interests youSelect the data set you
wish to look at
Browse through the directories to locate the files you want
Right click the product you want to save etc. to bring up the menu
Left click to view directly (where possible)
PSA PDS Overview |27/06/2011 | Slide 18
Automatic Download Scripts / Mirror Scripts
You can use any automatic download script (mirror, etc) to recursively download the data on the PSA.
Before installing a regular download scheme on your side (mirror, etc), please inform us by sending a short note to [email protected].
Be aware that the files that you see in your www-browser or your ftp-client are not the physical files, but a link into the PSA database system. When downloading data, the PSA server resolves the link on the fly and delivers the data back to you.
When building mirror scripts, you can compare your data items against size or time with the ones on the PSA server.
Be careful when using automatic downloads, as the size of the datasets can be huge (several 100GBytes or larger)! Please contact the PSA Helpdesk beforehand.
PSA PDS Overview |27/06/2011 | Slide 19
Notification Management:Registration I
1. Goto Login Page
1. Login with your user id / password
1. Login and stay here
1. Select ‘Change Notification Setting'
PSA PDS Overview |27/06/2011 | Slide 20
Registration II
Select Add
View Return
PSA PDS Overview |27/06/2011 | Slide 21
Notification via Email
Once you have registered, you will receive e-mails with announcements of the new data in the archive that you are interested in.
PSA PDS Overview |27/06/2011 | Slide 22
Interoperability aspects in Planetary
• IPDA contains representatives from all national agencies active in planetary data collection
• Standards being defined in IPDA
• Closer link required between IPDA and EuroPlanet
• IDIS and IPDA ?
• Closer link required between Planetary and Astronomy
• Registry
• Access protocols
• But very different Data Model and data generation process
PSA PDS Overview |27/06/2011 | Slide 23
Interoperability ESA PSA – NASA PDS
• Prototype in development In the IPDA context
• From Mars Map Browser, Select region of interest
• Contact PSA and PDS using the PDAP (Planetary Data Access Protocol)
• Display NASA PDS and ESA PSA images
PSA PDS Overview |27/06/2011 | Slide 24
VEX I/O via PDS Atmos
PSA PDS Overview |27/06/2011 | Slide 25
VEX I/O via PDS Atmos
PSA PDS Overview |27/06/2011 | Slide 26
Comments and Suggestions
Please send us your remarks: [email protected]
In case of problems, please visit the FAQ page before contacting us
In case you can not find the data you are looking for, please read the Mission Specific pages on the PSA home page
(http://www.rssd.esa.int/psa)