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#
# MEG coil definition file for Maxwell Filtering
#
# These coil definitions make use of integration points according to the last
# formula in section 25.4.62 in the "Handbook of Mathematical Functions:
# With Formulas, Graphs, and Mathematical Tables" edited by Abramowitz and Stegun.
#
# These coil definitions were used by Samu Taulu in the Spherical Space
# Separation work, which was subsequently used by Elekta in Maxfilter. The only
# difference is that the local z-coordinate was set to zero in Taulu's original
# formulation. Source of small z-coordinate offset (0.0003m) is due to manufacturing bug.
#
# Issues left to be sorted out.
# 1) Discrepancy between gradiometer base size. 16.69 in Elekta, 16.80 in MNE
#
# <class> <id> <accuracy> <np> <size> <baseline> "<description>"
#
# struct class id accuracy num_points size baseline description
# format '%d %d %d %d %e %e %s'
#
# <w_1> <x_1/m> <y_1/m> <z_1/m> <nx_1> <ny_1> <nz_1>
#
# struct w x y z nx ny nz
# format '%f %e %e %e %e %e %e'
#
# ....
#
# <w_np> <x_np/m> <y_np/m> <z_np/m> <nx_np> <ny_np> <nz_np>
#
# <class> 1 magnetometer
# 2 axial gradiometer
# 3 planar gradiometer
# 4 axial second-order gradiometer
#
# <accuracy> 0 point approximation
# 1 normal
# 2 accurate
#
#
1 2000 2 1 0.000e+00 0.000e+00 "Point magnetometer, z-normal"
1.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1 2002 2 1 0.000e+00 0.000e+00 "Point magnetometer, x-normal"
1.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00 0.0000000000e+00 0.0000000000e+00
1 2003 2 1 0.000e+00 0.000e+00 "Point magnetometer, y-normal"
1.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00 0.0000000000e+00
3 3012 2 8 2.639e-02 1.669e-02 "Vectorview planar gradiometer T1 size = 26.39 mm base = 16.69 mm"
1.4979029359e+01 1.0800000000e-02 6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.4979029359e+01 5.8900000000e-03 6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.4979029359e+01 5.8900000000e-03 -6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.4979029359e+01 1.0800000000e-02 -6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
-1.4979029359e+01 -1.0800000000e-02 6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
-1.4979029359e+01 -5.8900000000e-03 6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
-1.4979029359e+01 -5.8900000000e-03 -6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
-1.4979029359e+01 -1.0800000000e-02 -6.7100000000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1 3022 2 9 2.580e-02 0.000e+00 "Vectorview magnetometer T1 size = 25.80 mm"
7.7160493800e-02 -9.9922970000e-03 9.9922970000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 0.0000000000e+00 9.9922970000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
7.7160493800e-02 9.9922970000e-03 9.9922970000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 -9.9922970000e-03 0.0000000000e+00 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.9753086420e-01 0.0000000000e+00 0.0000000000e+00 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 9.9922970000e-03 0.0000000000e+00 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
7.7160493800e-02 -9.9922970000e-03 -9.9922970000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 0.0000000000e+00 -9.9922970000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
7.7160493800e-02 9.9922970000e-03 -9.9922970000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1 3024 2 9 2.100e-02 0.000e+00 "Vectorview magnetometer T3 size = 21.00 mm"
7.7160493800e-02 -8.1332650000e-03 8.1332650000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 0.0000000000e+00 8.1332650000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
7.7160493800e-02 8.1332650000e-03 8.1332650000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 -8.1332650000e-03 0.0000000000e+00 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.9753086420e-01 0.0000000000e+00 0.0000000000e+00 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 8.1332650000e-03 0.0000000000e+00 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
7.7160493800e-02 -8.1332650000e-03 -8.1332650000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
1.2345679010e-01 0.0000000000e+00 -8.1332650000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
7.7160493800e-02 8.1332650000e-03 -8.1332650000e-03 3.0000000000e-04 0.0000000000e+00 0.0000000000e+00 1.0000000000e+00
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