Abstract

On the longitude of Scandinavia the dayside auroral emissions within the polar cleft can be measured continuously in midwinter. The intensity of the Rayleigh scattered sunlight is measured to be about 100 R/Å at 4860 Å when the solar depression angle is 10° and increases rapidly with decreasing solar depression angle. The effect of scattering vanishes around 14° solar depression angle, and the intensity of the sky background can be as low as 2 R/Å or 3 R/Å. Absolute measurements of auroral emissions for smaller so depression angles than 14° require separate observations of the sky background.

© 1978 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription