Analysis of IPS Observations Using Wavelet Transform

E. Aguilar-Rodriguez1, M. Rodriguez-Martinez2, E. Romero-Hernandez3, J.C. Mejia-Ambriz4, J.A. Gonzalez-Esparza1, and M. Tokumaru5

1Instituto de Geofisica/Unidad Michoacan, UNAM, Mexico.2ENES-Morelia, UNAM, Mexico.3Posgrado en Ciencias de la Tierra, UNAM, Mexico.4University of California, San Diego, USA.5Solar-Terrestial Environment Laboratory, Nagoya, Japan.

IPS Workshop. Nagoya, Japan. November, 2013.

Thanks M. Tokumaru for funding to attend the IPS Workshop 2013.

Wavelet transformThe wavelet transform (WT) can be used to analyze time series that contain non-stationary power at many different frequencies.

The WT can map the power of a particular frequency at different times, giving an expansion of the signal in both time and frequency.

IPSRegion Radio interference

IPS Workshop. Nagoya, Japan. November, 2013.

“good” IPS intervals at 0.3-2 Hz frequencyRadio

interference

IPS Workshop. Nagoya, Japan. November, 2013.

IPS Workshop. Nagoya, Japan. November, 2013.

IPS Workshop. Nagoya, Japan. November, 2013.

IPS Workshop. Nagoya, Japan. November, 2013.

Speed determination

IPS Workshop. Nagoya, Japan. November, 2013.

m-index

Average power insidethis box

IPS Workshop. Nagoya, Japan. November, 2013.

WT-IPS analysis:

Allow us to derive, in a straightforward way, a simple method to obtain the scintillation index.

Is a useful tool to obtain the best intervals in IPS observations to perform the Fourier transform for solar wind speed determination purposes.

Can be used to visualize, in a better way, radio interferences in IPS time series and give us a way to determine a data quality in IPS observations.

Has the capability to be automatized in order to analyze IPS time series.

***IDL routines are available to construct the wavelets. e-mail: ernesto@geofisica.unam.mx