SPDF Science Advisory Group - September 29-30, 2005 Page 12/24/2016 9:09:48 PM Services of the Space...
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Transcript of SPDF Science Advisory Group - September 29-30, 2005 Page 12/24/2016 9:09:48 PM Services of the Space...
SPDF Science Advisory Group - September 29-30, 2005
Page 1
05/06/23 10:29 AM
Services of the Space Physics Data Facility (SPDF) / Sun-Earth Connection Active Archive (SECAA)
and the THEMIS Mission
Robert E. McGuireSPDF/Code 612.4, NASA Goddard Space Flight Center
Greenbelt MD 20771
SPDF Science Advisory Group - September 29-30, 2005
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05/06/23 10:29 AM
Major SECAA Services Today Relevant to THEMIS Science - 1
• Common Data Format (CDF)- Built on multi-dimensional conceptual view of data
> Highly flexible, efficient file storage, high-performance data retrieval (hyperputs/gets), > Supports various modes of internal compression
- Data Translation Web Service (DTWS) now available
• SSCWeb- Multi-mission orbits for coordinated science planning and retrospective analysis
> Listing & display in mapped coordinates and by regions of geophysical space– Plus 3-D interactive displays
> Time spans of region and magnetic conjunctions– Both spacecraft-spacecraft and with ground stations
- Includes all recent satellites of S3C interest (33+) and many ground stations
• CDAWeb- Simultaneous data from most instruments on most current (non-solar) S3C NASA and
related missions 1992-2005> Plus various ground-based experiments, selected holdings from some older missions
- Easy data browse and display, user-specified time and parameter subsets with graphics, listings, file downloads
SPDF Science Advisory Group - September 29-30, 2005
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05/06/23 10:29 AM
TIMED data on CDAWeb
SPDF Science Advisory Group - September 29-30, 2005
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05/06/23 10:29 AM
Major SECAA Services Today Relevant to THEMIS Science -2
• Web Service Interfaces- API for Internet access to our working services from other software packages
> Query capability to determine valid inputs and receive status messages- Foundation for our capability to serve middleware such as VxOs and new applications
• CDAWeb Plus- CDAWeb-like Java client built on extended CDAS web services- Enables unified view of SECAA’s data and services to the level of each service
> Pointers, combined file downloads, graphics and subsets
• Software- CDF- CDAWLib and CDFX, CDAWeb - Translators - SkeletonEditor, MakeCDF
• CDF and essentially all the above codes are Open Source under NOSA license
SPDF Science Advisory Group - September 29-30, 2005
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05/06/23 10:29 AM
CDF Current Status (details for breakout)
• CDF 3.1 - Development underway. Schedule for release in January 2006- Main features
> Easy-to-use Standard Interface C & Fortran routines for zVariables (instead of Internal Interface)> Option for CDFs compatible with CDF 2.7 or earlier releases (via environment variable or API)
• 64-bit CDF included in IDL 6.2 for AMD64 is not working properly- Fix will be included in the next IDL release (6.3), currently scheduled for late 1Q, 2006- Working 64-bit CDF available at http://cdf/html/idl62_amd64_problems.html
• CDF News- Next IDL release (6.3) scheduled for release in late 1Q, 2006
> Will include the latest CDF library (Version 3.1)- Matlab will support CDF 3.1 in about 6 months
• Data Translation Web Service (DTWS)- Web client available at http://translators.gsfc.nasa.gov- Allows to translate one or more local and/or remote files (up to 10 files at a time)- Can be called within applications (see http://cdf.gsfc.nasa.gov/html/dtws.html for details)- Individual data translators (both source and binary) are available at
http://cdf.gsfc.nasa.gov/html/dtws.html
SPDF Science Advisory Group - September 29-30, 2005
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05/06/23 10:29 AM
SPDF/SECAA Services are Used by the Community
• Figure represents system executions (not just web “hits”)
• Another metric is the number of distinct users (or distinct IP addresses) executing services- Most easily available for CDAWeb, e.g. period July 1, 2004- June 30, 2005- ~290 distinct addresses made >100 requests during the year, ~1300 distinct addresses made >10 requests
SPDF Science Advisory Group - September 29-30, 2005
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05/06/23 10:29 AM
How Can SECAA Contribute to the THEMIS Science Effort?
• THEMIS is using CDF as a base for its ground processing- I hope to talk about details, progress, needs in the afternoon breakouts- Is CDF support needed for other format translations, in other s/w packages?
• We plan to add the THEMIS spacecraft orbits to SSCWeb when launched- I hope to talk about mechanics of getting orbit data in the afternoon breakouts- Are there new orbit graphics or models needed for THEMIS support?- Are there predictive orbits that would be useful or interesting in SSCWeb sooner?
• Data we now serve via Web Services is available for THEMIS to build from
• We would be pleased to serve appropriate THEMIS in e.g. CDAWeb- To add complementary value and increase usefulness of THEMIS data
> Make data available through web services (SOAP, REST) as well as FTP, HTTP> To better enable science use of THEMIS data in context of data from other missions> THEMIS adds to the science utility of the combined data collection
- Work with THEMIS group to set up appropriate/complementary graphics (cf. TIMED)- Are there other housekeeping (cf. IMAGE), ground or other data needs?
• Open to discuss alternative/different approaches and other needs- E.g. more distributed technical solutions and other partnering