Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
Volume 13, issue 9
Ann. Geophys., 13, 976–980, 1995
https://doi.org/10.1007/s00585-995-0976-0
© European Geosciences Union 1995
Ann. Geophys., 13, 976–980, 1995
https://doi.org/10.1007/s00585-995-0976-0
© European Geosciences Union 1995

  30 Sep 1995

30 Sep 1995

A comparative study of the sunrise and sunset effects on the integrated field intensity of VLF atmospherics

A. B. Bhattacharya, B. K. Datta, and R. Bhattacharya A. B. Bhattacharya et al.

Abstract. A comparative study is made of the stepped structure of atmospherics during sunrise and sunset hours at three harmonically related frequencies in the VLF band, observed at the coast of the Bay of Bengal. The occurrences of the steps, their duration, time sequence and amplitudes are critically examined. Our analysis reveals that the start times of the third and second steps of the sunrise effect are always before ground sunrise, while the start of the main step is distributed on both sides of it. During sunset hours, the onset time of the main step is before the local ground sunset, but for the second and third steps, the onset times are after that. The results are interpreted by considering the multi-hop propagation as well as the distributed noise sources surrounding the observing site.

Publications Copernicus
Citation