Articles | Volume 40, issue 5
Ann. Geophys., 40, 563–570, 2022
https://doi.org/10.5194/angeo-40-563-2022

Special issue: From the Sun to the Earth's...

Ann. Geophys., 40, 563–570, 2022
https://doi.org/10.5194/angeo-40-563-2022
Regular paper
05 Sep 2022
Regular paper | 05 Sep 2022

Temporal and altitudinal variability of the spread F observed by the VHF radar over Christmas Island

Ricardo Yvan de La Cruz Cueva et al.

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Short summary
This paper brings analysis of spread-F echoes along the years of 2003 to 2012 from Christmas Island radar. We organize our data with the objective of observing the peak time and altitude distribution. Our results indicate the peak time occurrence of echoes to be distributed closer to local sunset during solar maximum and around midnight during solar minimum; meanwhile, the peak altitude echoes show higher altitude occurrences during solar maxima and lower altitudes during solar minima.