Maintained by: U.S. Department of Commerce, National Oceanic and Atmospheric Administration. The WDC for STP, Boulder is operated by, and collocated with, the National Geophysical Data Center (NGDC).

Summary of Data Held: WDC for Solar-Terrestrial Physics (STP), Boulder collects, analyzes, archives, and disseminates data that describe the space environment from the surface of the sun to the surface of the Earth including the sun, interplanetary space, the magnetosphere, the ionosphere, the thermosphere, geomagnetism, and cosmic rays. Special emphasis is given to data sets that support the modeling of, and coupling between, regions of space.
Solar activity: Data sets cover a wide range of routine solar measurements and events including sunspot numbers, solar radio emissions, solar x-rays, energetic particles, listings of event characteristics, and solar magnetic fields.
Space environment monitors: Ground-based instruments and NOAA satellites monitor magnetospheric magnetic fields, energetic particles, inferred interplanetary sector structure, and magnetosphere-ionosphere coupling.
Ionosphere: Remote sensing data from ground-based instruments are used to monitor ionospheric densities and total electron content. DMSP and NOAA satellites record ionospheric densities, temperatures, composition, drifts, and images of the aurora.
Geomagnetism: Geomagnetic variations recorded on satellites and on the ground are maintained at one minute, one hour, daily, and monthly resolution and are summarized as global indices of magnetic activity.
Cosmic rays: Neutron monitor data are received from 50 stations.

User Services: The WDC for STP is located in the David Skaggs Building, 325 Broadway, Boulder, Colorado. Visitors are welcome during normal working hours; advance notice is recommended. A visiting scientist program exists. Digital and analog data are available on a variety of media. Digital data are provided for online file transfers or publication quality prints; magnetic media or CD-ROM. WDC for STP supports the Space Physics Interactive Data Resource (SPIDR) that allows Worldwide Web users to access, browse, display, and analyze STP data.

Electronic Access:
Worldwide Web: http://www.ngdc.noaa.gov/stp.html
FTP: ftp.ngdc.noaa.gov
STP Bulletin Board via modem access at +1 303 497 7319,
login: "online"
Data are available on most media including CD-ROM, via Internet, and other media on request. On-line access via Worldwide Web (URL address above) and anonymous FTP (ftp.ngdc.noaa.gov). Login for FTP access is userid: anonymous, and password: your full e-mail address.

Data Publications: WDC-A for STP publishes two data reports, Solar Geophy-sical Data is distributed monthly and UAG data reports are distributed on an irregular basis. CD-ROMs of frequently requested data sets are also published.

Special Projects: Defense Meteorological Satellite Program (DMSP) satellites provide global coverage of ionospheric, meteorological, and environmental events. Data from NOAA space environment monitoring satellites at geosynchronous orbit (Geosynchronous Operational Environmental Satellite) and polar orbit (NOAA Polar Operational Environmental Satellite) are available from WDC for STP, Boulder and SPIDR.