The SPDF is a project of the Heliospheric Science Division (HSD) at NASA's Goddard Space Flight Center. SPDF consists of web-based services for survey and high resolution data and trajectories. The Facility supports data from most NASA Heliophysics missions to promote correlative and collaborative research across discipline and mission boundaries. Read More here.
News & Announcements
Revised Definition of the Sunspot Number Index
Sunspot Number Index values 1963-2015 in OMNI have been updated to the revised Version 2 definition now used by the Royal Observatory of Belgium (see http://sidc.oma.be/silso/datafiles/). The updated values are generally larger by factors 1.2-1.7 and can be compared in detail using http://omniweb.sci.gsfc.nasa.gov/form/sunspot_v1_v2.html.
Common Data Format (CDF) Version 3.6 is now available. We strongly urge all CDF users to promptly upgrade their CDF software to better ensure the correct handling of times after the 2015 June 30 leap second. Updates for Perl, IDL, Matlab, and Java interfaces and the SKTeditor CDF editor are also available. CDAWeb is receiving and also producing CDF V3.6 files.
Email list for SPDF Announcements
Please sign up for an email list of announcements related to SPDF
http://spdf.gsfc.nasa.gov software and services (changes, upgrades,
outages). Postings to email@example.com will be very
infrequent but are especially useful to regular users of our web services
and Java clients (CDAWeb+, xSonify, TIPSOD). To subscribe, go to https://lists.nasa.gov/mailman/listinfo/gsfc-spdf-announcements or send an email to