Planetary Science Archive (PSA) and PDS Introduction VEX / MEX Data Workshop 27 th June to 1 st July 2011 ESAC Dave Heather

PSA PDS Overview |27/06/2011 | Slide 2 Planetary Science Archive Available since March 2004: Active development, PSA 3.0 to come in December PSA Data Handling ESA-ESAC (Spain) David Heather lead Archive Scientist, setting up the requirements Interface with Instrument Teams Validating Data Sets PSA Development 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 Giotto Huygens Venus Express ALL IN PDS FORMAT

PSA PDS Overview |27/06/2011 | Slide 5 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   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   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.

PSA PDS Overview |27/06/2011 | Slide 11 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: html/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  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 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 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 Screen Click on the instrument that interests you Select 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  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 Once you have registered, you will receive s 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:  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 (