European Space Agency

Royal Belgian Institute for Aeronomy

um515 - perform a Schmidt normalisation

subroutine  um515(dt, nmax, g0, g1, g2, g)

Parameters:

• dt [real8,in] :: time in year for the extrapolation

• nmax [integer4,in] :: effective size of parameters g0, g, g2 and g

• g0 (nx140, nx140) [real8,in] :: expansion coefficients at the base epoch

• g1 [real8] :: first derivative of the expansion coefficients

• g2 (nx140, nx140) [real8,in] :: second derivative of the expansion coefficients

• g (nx140, nx140) [real8,out] :: extrapolated and normalised expansion coefficients

Description

The subroutine um515() extrapolates the expansion coefficients of a geomagnetic field model and applies the Schmidt normalisation. The dt argument specifies the time delay between the base epoch of the model and the epoch for which the model is to be extrapolated. As result, the g argument contains an array with the new expansion coefficients.

Diagnostics

None

Common Blocks

None

Dependencies

Called by

• um512 - set the GSFC 12/66 model coefficients

• um513 - set the DGRF/IGRF model coefficients

Calls

None

See also

None

Reported Bugs

None

Examples

None

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UNILIB/tags/v3.02