Electron density and electric field over Resolute Bay and F region ionospheric echo detection with the Rankin Inlet and Inuvik SuperDARN radars

Research output: Contribution to journalArticlepeer-review


  • A. V. Koustov
  • P. V. Ponomarenko
  • M. Ghezelbash
  • David Themens
  • P. T. Jayachandran

Colleges, School and Institutes

External organisations

  • University of Saskatchewan
  • University of New Brunswick


Joint observations of the Rankin Inlet and Inuvik Super Dual Auroral Radar Network HF radars and Resolute Bay (RB) Canadian Advanced Digital Ionosonde are used to assess the electron density at the F region peak and the electric field magnitude as factors affecting echo detection over RB. We demonstrate that the radars show similar diurnal and seasonal variations in ionospheric echo occurrence. During nighttime and at radar frequencies of ∼12 MHz, optimum densities for both radars are shown to be ∼ 1.4 × 105 cm-3, ∼1.8 × 105 cm-3, and ∼2.0 × 105 cm-3 for winter, equinox, and summer, respectively. During daytime, optimum densities are larger by (0.2 - 0.3) × 105 cm-3. Observations at lower radar frequencies of ∼10 MHz show smaller required densities during nighttime, by ∼0.3 × 105 cm-3. Optimum electric fields for the moments of echo detection over RB are found to be 5-25 mV/m with no clear threshold effect and any seasonal dependence. The presented data suggest that for echo detection, favorable propagation conditions along the entire path of radio waves toward the scattering volume are important.


Original languageEnglish
Pages (from-to)1194-1205
Number of pages12
JournalRadio Science
Issue number12
Publication statusPublished - 19 Nov 2014


  • CADI ionosonde, electric field, electron density, F region echoes, HF SuperDARN radar