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 digital CCD all-sky spectrograph was made by the PolarGeophysical Institute (PGI) to support IPY activity in auroral research. Thedevice was tested at the Barentsburg observatory of PGI during the winterseason of 2005–2006. The spectrograph is based on a cooled CCD and atransmission grating. The main features of this spectrograph are: a wide fieldof view (~180°), a wide spectral range (380–740 nm), a spectralresolution of 0.6 nm, a background level of about 100 R at 1-min exposuretime. Several thousand spectra of nightglow and aurora were recorded duringthe observation season. It was possible to register both the strong auroralemissions, as well as weak ones. Spectra of aurora, including nitrogen and oxygenmolecular and atomic emissions, as well as OH emissions of the nightglow areshown. A comparison has been conducted of auroral spectra obtained by thefilm all-sky spectral camera C-180-S at Spitsbergen during IGY, with spectraobtained at Barentsburg during the last winter season. The relationshipbetween the red (630.0 nm) and green (557.7 nm) auroral emissions shows thatthe green emission is dominant near the minimum of the solar cycle activity(2005–2006). The opposite situation is observed during 1958–1959, with amaximum solar cycle activity

First observations from a CCD all-sky spectrograph at Barentsburg (Spitsbergen)