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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

An eight stage balanced modulation scheme for dual beam polarimetry ispresented in this paper. The four Stokes parameters are weighted equally in allthe eight stages of modulation resulting in total polarimetric efficiency ofunity. The gain table error inherent in dual beam system is reduced by usingthe well known beam swapping technique. The wavelength dependent polarimetricefficiencies of Stokes parameters due to the chromatic nature of the waveplatesare presented. The proposed modulation scheme produces better Stokes $Q$ and$V$ efficiencies for wavelengths larger than the design wavelength whereasStokes $U$ has better efficiency in the shorter wavelength region. Calibrationof the polarimeter installed as a backend instrument of the Kodaikanal TowerTelescope is presented. It is found through computer simulation that a 14% skytransparency variation during calibration of the polarimeter can introduce$\approx 1.8%$ uncertainty in the determination of its response matrix.

An efficient modulation scheme for dual beam polarimetry