Search Coil Spectra, Southern Crossing, Orbit 27, 1996/08/23

Southern Crossing, Orbit 27, 1996/08/23

Below is a southern crossing made by the FAST satellite after the Mag boom deployment. The top plot is a spectragram of the 21" search coil signal in the 0 to ~16 kHz frequency range computed on-board. The bottom plot is the 0 - 2 MHz spectra. We interpret the emissions on the top plot as near-lower hybrid frequency whistler waves in the auroral zone and magnetospheric hiss.