Skip to main content
Article thumbnail
Location of Repository

Observations of omega bands using an imaging riometer.

By A.J. Kavanagh, J.A. Wild and F. Honary


We present a case study of an omega band cur- rent system from 11 May 1998 using data from the Imaging Riometer for Ionospheric Studies (IRIS) in Finland. For the first time, images of a substorm-related omega band in cos- mic noise absorption are shown. The substorm in question was one of a string that occurred on that day; inspection of geostationary satellite data indicates that this was a sawtooth event. Using a previously established statistical relationship, the IRIS data is used to provide maps of Hall conductance and compared with previous estimates utilising both HF and VHF coherent-scatter radars. Discrepancies are discussed with reference to precipitation spectrum and the geometry of the experimental set-up. The imaging riometer data provides a higher spatial resolution than the combined magnetometer- radar pairing for determining the Hall conductance and can also be used to identify the extent of the precipitation in the absence of optical data

Year: 2009
OAI identifier:
Provided by: Lancaster E-Prints

Suggested articles


  1. (1989). A Global Pulsation Event with Conjugate Study,
  2. (1974). A study of auroral displays photographed from DMSP-2 satellite and from the Alaska meridian chain of stations,
  3. (2005). A.: Mesoscaleionospheric electrodynamics of omega bands determined from ground-based electromagnetic and satellite optical observations,
  4. (1995). An Imaging Riometer for Ionospheric Studies,
  5. (1986). Characteristics of Auroral Electron Precipitation on the Morningside,
  6. (2009). Characteristics of eastward drifting omega Ann.
  7. (2008). Comparison of methods to determine auroral ionospheric conductances using ground-based optical and riometer data,
  8. (1995). DARN/SuperDARN: A global view of the dynamics of he highlatitude convection,
  9. (1975). Development of substorm in auroral radio absorption,
  10. (1981). Development of the Auroral Absorption Substorm: Studies of Pre-onset Phase and Sharp Onset Using an Extensive Riometer Network, Planet. Space Sci.,
  11. (2007). Energetic electron precipitation during sawtooth injections,
  12. (2007). Ground based identification of dispersionless electron injections, doi
  13. (2000). H.J.: Multiinstrument observations of the electric and magnetic field structure of omega bands,
  14. (1989). High-z energetic particles at geosynchronous orbit during the great solar proton event series of October
  15. (2004). Imaging riometer observations of drifting absorption patches in the morning sector,
  16. (1978). Long-period irregular magnetic pulsations,
  17. (1993). Magnetospheric Plasma Analyzer (MPA): Initial Three-Spacecraft Observations from Geosynchronous Orbit,
  18. (2005). Mesoscale ionospheric electrodynamics of omega bands determined from ground-based electromagnetic and satellite optical observations,
  19. (1996). Monitoring Space Weather with the GOES Magnetometers,
  20. (1997). Multi-method observations and modeling of the three-dimensional currents associated with a very strong Ps6 event,
  21. (2000). Multiinstrument observations of the electric and magnetic field structure of omega bands, doi
  22. (1981). Near equatorial high resolution measurements of electron precipitation at L≈6.6,
  23. (2000). Observations of ionospheric flows and particle precipitation following a Sudden Commencement,
  24. (2003). Observations of the spatial structure of electron precipitation pulsations using an imaging riometer,
  25. (2005). Pc5 modulation of high energy electron precipitation: particle interaction regions and scattering efficiency, doi
  26. (1979). Perturbation magnetic fields and current systems associated with eastward drifting auroral structures,
  27. (1994). Recovery phase of magnetospheric substorms and its association with morning sector aurora,
  28. (2002). Simultaneous multipoint Observations of stormtime substorms with the CLUSTER, IMAGE, POLAR, geosynchronous and GPS satellites,
  29. (1978). STARE: a new radar auroral backscatter experiment in northern Scandinavia,
  30. (1993). Studies of polar current systems using the IMS Scandinavian magnetometer array, doi
  31. (2002). Substorm related changes in precipitation in the dayside auroral zone – a multi instrument case study,
  32. (1976). The eastward movement of the structure of auroral radio absorption events in the morning sector,
  33. (1999). The relationship between electric fields, conductances and currents in the high-latitude ionosphere: a statistical study using EISCAT data,
  34. (1959). The riometer: a device for the continuous measurements of Ionospheric absorption,
  35. (1997). Using los alamos geosynchronus energetic particle data in support of other missions, in: Satellite-Ground Based Coordination Source Book, edited by:
  36. (1998). Westward moving dynamic substorm features observed with the IMAGE magnetometer network and other ground-based instruments,

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.