RDst - Real Time Dst

By Space Environment Corporation


  • RDST_current_1h.txt

    RDst is the Real Time Dst indices. It is an approximation to the original Dst indices, which was used to indicate strength of the magnetic disturbance associated with the 'ring current' in the inner magnetosphere. It provides insight into the magnitude of space weather events in the upper atmosphere and ionosphere.

    The Dst index is produce through the analysis of magnetic deflection as measured at 4 magnetic observatories:

  • 1. Hermanus, South Africa (HER)
  • 2. Kyoto, Japan (replaced by Guam in RDst) (GUA)
  • 3. San Juan, Puerto Rico (SJG)
  • 4. Honolulu, Hawaii, U.S. (HON)

    The RDst strives to reproduce the Dst index through an automated computer script in real time. The program and algorithms to generate RDst were created at Space Environment Corporation.



    The figure above compares RDst (red) with the Kyoto KDst (black).

    Both Space Environment Corporation's RDst and the Kyoto Dst are realtime Dst estimates. The RMS of (KDst-RDst) is ~7. The average of (KDst-RDst) is ~+6. It is expected that both KDst and RDst will differ similarly from a definitive, post-processed Dst value.

    Two products of the RDst determination are the Secular Value of the earth's magnetic field at each magnetic observatory and the Solar Quiet Day variation of the magnetic field produced by ionospheric currents. The following are graphs of the Solar Quiet Days for each observatory.


  • Guam Solar Quiet H Comp
  • Hermanus Solar Quiet H Comp
  • Honolulu Solar Quiet H Comp
  • San Juan Solar Quiet H Comp
  • Diagnostics


    Copyright © 2009 Space Environment Corporation