Subroutine UM512 - set the GSFC 12/66 model coefficients
CALL UM512 (tm, lbl)
Epoch of the geomagnetic field calculation expressed in year [in]
Label of the geomagnetic field model [out]
The subroutine UM512 initializes the expansion coefficients of
the geomagnetic field inside the common block UC140
with the coefficients of the GSFC 12/66 model.
tm arguments specifies the epoch to which the model
has to be extrapolated. The base epoch of the GSFC 12/66 model is 1960.
As result, the
lbl argument contains a string with the
name of the model.
magnetic field description
select a geomagnetic field model
perform a Schmidt normalisation
set the Jensen & Cain 1960 model coefficients
set the DGRF/IGRF model coefficients