English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A long-term (1978–1990) database of total electron content (TEC) from a\udlocation (Calcutta: 22.58° N, 88.38° E geographic, dip:\ud32° N)\udnear the northern crest of the equatorial ionization anomaly has\udextensively been studied to characterize the contribution of fountain effect\udin the maintenance of ambient ionization. The equatorial electrojet (EEJ)\uddata obtained from ground magnetometer recording are used to assess the\udcontribution of equatorial fountain. Analysis made with instantaneous\udvalues, day's maximum values and time-integrated values of EEJ strength\udexhibit more or less similar features. When instantaneous values of EEJ are\udconsidered TEC variations exhibit two maxima in correlation, one around\ud10:00–12:00 IST and the other around 18:00–20:00 IST. The later maximum in\udcorrelation coefficient is conspicuously absent when integrated values of\udEEJ are considered. An impulse-like feature is reflected in the diurnal TEC\udvariation during the time intervals (09:00–10:00 IST) and (18:00–19:00 IST).\udThe statistical analysis reveals greater correspondence with high\udlevel of significance between diurnal TEC and EEJ in the descending epoch of\udsolar cycle than in the ascending one. On the seasonal basis, TEC in the\udsummer solstitial months are observed to be more sensitive to the changes in\udEEJ strength than in the equinoctial and winter solstitial months. Combining\udthe effects of solar flux, season, local time and EEJ an empirical formula\udfor monthly mean diurnal TEC has been developed and validated using observed\udTEC data. An estimation of the relative contributions of the several terms\udappearing in the formula reveals much more solar flux contribution (~50–70%)\udin the maintenance of ambient ionization around the present\udlocation than the EEJ effects (maximum~20%)

Electrojet control of ambient ionization near the crest of the equatorial anomaly in the Indian zone