Annotated List of PREDICTIONS OF Magnetic Conjunctions
From November 1996 to June 2000 Between


And for shorter intervals for FAST and

Interball Aurora
Interball Tail

Compiled and maintained by W.K. Peterson/LASP, University of Colorado
Comments, Information etc to him
Last updated June 16, 2005 by Daryl Carr

Support for maintenance of this web page was terminated by action of the FAST science working group in June, 2000. W.K. Peterson

Lists of real (not predicted) magnetic conjunctions

Caution: The information here is calculated using predictive orbit values in order to schedule operations on satellites that operate intermittently. Data is generally available from POLAR 24 hrs a day, but data from the other satellites is not.
Also a large fraction of the hits in these conjunction lists will not be in locations where it is interesting or practical to acquire data simultaneously.
These lists are provided to satellite operators for scheduling purposes. Contact the satellite operators for information about the actual times FAST, MSX, Interball Aurora, and Akebono are operated.

OPTICAL or MAGNETIC conjunctions

Optical Conjunctions

When a magnetic footprint of another spacecraft lies within POLAR/VIS and/or POLAR/UVI field of view.
and one or more of the Polar Imagers is scheduled to operate

NOTE The POLAR project maintains a list of times of Exceptional Southern Oval Viewing . Selected times from that list are noted below.

Link to the Polar Image Pointing Plan Page

Magnetic Conjunctions

When two satellites:

Are in the same hemisphere
On or near the same magnetic field line

The ascii files of magnetic conjunction times pointed too below were caluclated using NASA supplied SSC software. The size of the magnetic conjunction box is indicated at the head of each file.

NOTE. Orbital predictions for low perigee satellites, such as FAST (350 km) can not take into account the significant and variable drag forces caused by ionospheric heating associated with geomagnetic activity. The magnitude of the problem has been illustrated by Sardi Parthasarathy of the NSSDC.

Predictions of conjunctions calculated From October 1996 to February 1998

POLAR conjunctions

These are here for planning purposes purposes. When the Polar project web pages display conjunctions, links to polar project generated output will be supplied.

Yeh-Kai Tung (U.C. Berekely) maintains a page that identifies the most promising predicted POLAR/FAST conjunctions. Last Updated in Late 1997.

  • POLAR-FAST-2000
  • POLAR-FAST-1999
  • POLAR-FAST-1998

    Other relevant web sites

  • A Polar Science Priority Operations Topic (SPOT) Page
    Polar operations intervals will be available here when they are scheduled.
  • The NASA Satellite Situation Center (SSC) System and Services pages
    Prepared by Bill Peterson

    Last update 07/14/2005 by Daryl Carr