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The Satellite Situation Center also maintains a number of online list files of MAGNETOSPHERIC and HELIOSPHERIC trajectory data of wide interest. In addition, SPACEWARN BULLETIN, a monthly publication containing new spacecraft launches and descriptions, and three lists of collections of spacecraft of scientific or navigational interest are held for interested users.

The data is broken up into the following categories:

Two-Line orbital elements for a number of science payload spacecraft: active.el, akebono.el, apex.el, de1.el, dmspf8.el, dmspf9.el, dmspf10.el, dmspf11.el, dmspf12.el, freja.el, goes6.el, goes7.el, goes8.el, hst.el, mir.el, noaa12.el, noaa14.el, sampex.el, uars.el, and others.

The Classical or cartesian orbital elements for high altitude spacecraft (altitude greater than 6 RE). The file names are "spacecraft".el

The mutual distances between pairs of satellites, including IMP 8, ACE, Wind and Genesis.

The model-based solar wind times of IMP 8 since 1973.

The ascii files of trajectories of heliospheric satellites, and comets in solar ecliptic and heliographic coordinates.

The ascii files of trajectories of planets.

Spacewarn Bulletin archive site and the Spacewarn Bulletin is a monthly publication of NSSDC/WDC-SI;, as the World Warning Agency for Satellites, under the auspicies of COSPAR. It provides each month, a list of newly launched s/c, with descriptions of the spacecraft and their payloads, and main orbital parameters. There is a list of s/c with continuous beacons at < 150 MHz, that are of interest to ionospheric research. This is followed by cumulative lists of GPS s/c, and of GLONASS s/c, both of which enable calculation of observer's location within about 100 meters, on land or sea. Finally, there is a list of s/c and rocket bodies that re-entered during the month. These monthly files, since January 91, are named as SPX.NNN; the April 2005 file has NNN as 618, the number changing each month by one.
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