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Abbravation: Annales Geophysicae

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Copernicus GmbH

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DOI

10.1007/bf01989446

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0992-7689

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Comparison of Fregion electron density observatio

Authors: Nygrén T Markkanen M Lehtinen M Tereshchenko E D Khudukon B Z Evstafiev O V Pollari P
Publish Date: 1996/12/31
Volume: 14, Issue: 12, Pages: 1422-1428
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Abstract

Abstract In November 1995 a campaign of satellite radiotomography supported by the EISCAT incoherent scatter radar and several other instruments was arranged in Scandinavia A chain of four satellite receivers extending from the north of Norway to the south of Finland was installed approximately along a geomagnetic meridian The receivers carried out difference Doppler measurements using signals from satellites flying along the chain The EISCAT UHF radar was simultaneously operational with its beam swinging either in geomagnetic or in geographic meridional plane With this experimental setup latitudinal scans of Fregion electron density are obtained both from the radar observations and by tomographic inversion of the phase observations given by the difference Doppler experiment This paper shows the first results of the campaign and compares the electron densities given by the two methods

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  1. Equatorial ionospheric response to isolated auroral substorms over a solar cycle (1980−85): evidence of longitudinal anomaly
  2. The relationship between VHF radar auroral backscatter amplitude and Doppler velocity: a statistical study
  3. Long-period fading in atmospherics during severe meteorological activity and associated solar geophysical phenomena at low latitudes
  4. A statistical analysis for pattern recognition of small cloud particles sampled with a PMS-2DC probe
  5. Inversion, error analysis, and validation of GPS/MET occultation data
  6. Electron cyclotron waves in the presence of parallel electric fields in the Earth's auroral plasma
  7. Methods of detection and estimation errors in ST radar studies
  8. Simultaneous observations of the 2-day wave at London (43°N, 81°W) and Saskatoon (52°N, 107°W) near 91 km altitude during the two years of 1993 and 1994
  9. Low frequency waves in plasmas with spatially varying electron temperature
  10. A generation mechanism for chorus emission
  11. MUREX: a land-surface field experiment to study the annual cycle of the energy and water budgets
  12. Observations of long-lived solar wind streams during 1990-1993
  13. On the prediction of solar activity using different neural network models
  14. ELF wave generation in the ionosphere using pulse modulated HF heating: initial tests of a technique for increasing ELF wave generation efficiency
  15. An overview of a heavy rain event in southeastern Iberia: the role of large-scale meteorological conditions
  16. Cooling rate of thermal electrons by electron impact excitation of fine structure levels of atomic oxygen
  17. The structure and origin of magnetic clouds in the solar wind
  18. Outflowing ionospheric oxygen-ion motion in a reconfigurating magnetosphere
  19. Long duration Pc 5 compressional pulsations inside the Earth's magnetotail lobes
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