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

We investigated the radio wavefront of cosmic-ray air showers with LOPESmeasurements and CoREAS simulations: the wavefront is of approximatelyhyperbolic shape and its steepness is sensitive to the shower maximum. For thisstudy we used 316 events with an energy above 0.1 EeV and zenith angles below$45^\circ$ measured by the LOPES experiment. LOPES was a digital radiointerferometer consisting of up to 30 antennas on an area of approximately 200m x 200 m at an altitude of 110 m above sea level. Triggered by KASCADE-Grande,LOPES measured the radio emission between 43 and 74 MHz, and our analysis mightstrictly hold only for such conditions. Moreover, we used CoREAS simulationsmade for each event, which show much clearer results than the measurementssuffering from high background. A detailed description of our result isavailable in our recent paper published in JCAP09(2014)025. The presentproceeding contains a summary and focuses on some additional aspects, e.g., theasymmetry of the wavefront: According to the CoREAS simulations the wavefrontis slightly asymmetric, but on a much weaker level than the lateraldistribution of the radio amplitude.

Investigation of the radio wavefront of air showers with LOPES measurements and CoREAS simulations (ARENA 2014)