A new whistler recorder and analyzer developed at Agra*

Abstract

A new experimental set-up for recording and analysis of whistlers and VLF emissions has been developed at Agra, which is less expensive, automatic and time saving in comparison to earlier experimental set-up being used in different whistler stations in India. The new experimental set-up employs a crossed loop antenna, amplifiers, low pass filter, a sound

card and PC with a software specially designed for recording and analysis of VLF data. Some examples of whistlers and VLF emissions recorded by the new set-up are presented and their frequency-time characteristics are discussed thoroughly.