Earth Planets Space, Vol. 61 (No. 5), pp. 615-619, 2009LETTER
P. Martin1, N. E. Turner1, and J. Wanliss2
1Florida Institute of Technology
(Received October 26, 2007; Accepted August 16, 2008; Online published May 29, 2009)
Previous studies have shown that auroral luminosity oscillations are often associated with substorms. Here we examine photometer data for the magnetospheric substorm on April 1, 2000 (expansive phase onset at 0525 UT) to study the detailed timing of the auroral oscillations relative to onset. Accurate timing information for the periodicities in the photometer data were determined using the wavelet transform. We find that the oscillations occur primarily during the recovery phase.
Key words: Aurora, substorm, wavelet, CANOPUS.