IPS presentation - IPS - Radio and Space Services
IPS presentation - IPS - Radio and Space Services
IPS presentation - IPS - Radio and Space Services
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Regional ionospheric modelling :SCHA<br />
m<br />
m<br />
[ g cos( mλ<br />
) h sin( mλ<br />
)]<br />
K max K<br />
m<br />
VTEC(<br />
θ , λ ) P (cosθ<br />
)<br />
+<br />
c<br />
c<br />
= ∑∑<br />
k= 0 m=<br />
0<br />
nk ( m )<br />
c k<br />
c<br />
k<br />
c<br />
00UT IRI SCHA IRI-SCHA (TECU)<br />
• Spherical Cap Harmonic Analysis<br />
(SCHA) for regional model of TEC<br />
• High spatial resolution with less<br />
coefficients than global SHA<br />
05UT<br />
• Expansion stable over small regions,<br />
scalable<br />
• SCHA gives more detail than simple<br />
interpolation (e.g. kriging)<br />
10UT<br />
• Combining SCHA with a model<br />
ionosphere gives even more detail
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