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# definition of dB - PowerPoint PPT Presentation

definition of dB. * dB obs is calculated as the deviation from 12-hour tr -moving average of observed IMF in GSE coordinate. * dB exp is calculated from the model in IMF coordinate as. For  t =0. For  t =1. then converted to the GSE coordinate. Conversion of co-ordinate. Z gse.

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## PowerPoint Slideshow about 'definition of dB' - tehya

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Presentation Transcript

* dBobs is calculated as the deviation from 12-hour tr-moving average

of observed IMF in GSE coordinate.

* dBexp is calculated from the model in IMF coordinate as

For t=0

For t=1

then converted to the GSE coordinate

Zgse

Yimf

Zimf

IMF co-ordinate

Ximf is in Xgse-Ygse plane

Yimf is pointing north ward, and in Zimf-Zgse plane

Ximf

Ygse

Xgse

Select time period that

sector was same

in past 12 hour

2006all station

2003all station

2001all station

From McMurdo only t=0

From all station t=0

From all station t=0

From all station t=1

From all station t=0

October 2001

From all station t=0

From all station t=0

October 2003

From all station t=0

December 2006

* dBobs is calculated as the deviation from 12-hour tr-moving average

of observed IMF in GSE coordinate.

For n=0

* dBexp is calculated from the model in IMF coordinate as

For n=1

For any n

then converted to the GSE coordinate

2001all station

August 2001

From all station nt=0

From all station nt=0

Away

Toward

From all station nt=3

From all station nt=6

From all station nt=0

From all station nt=3

From all station nt=6