definition of dB

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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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Presentation Transcript
definition of dB

* 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

Conversion of co-ordinate

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

2006 McMurdo

Select time period that

sector was same

in past 12 hour

Apr 2001

From McMurdo only t=0

From all station t=0

April 2001

From all station t=0

From all station t=1

August 2001

From all station t=0

October 2001

From all station t=0

August 2003

From all station t=0

October 2003

From all station t=0

November 2006

December 2006

definition of dB

* 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

August 2001

From all station nt=0

August 2001

From all station nt=0

Away

Toward

August 2001

From all station nt=3

August 2001

From all station nt=6

Mar 2001

From all station nt=0

Mar 2001

From all station nt=3

Mar 2001

From all station nt=6