grid_tools
1.3.0
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Private Member Functions | |
subroutine | hgrid_ak_dc (lx, ly, nx, ny, a, k, pdlat, pdlon, pdazi, delx, dely, xc, xcd, garea, ff) |
Use a and k as the parameters of an Extended Schmidt-transformed Gnomonic (ESG) mapping centered at (pdlat,pdlon) and twisted about this center by an azimuth angle of pdazi counterclockwise (these angles in degrees). More... | |
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private |
Use a and k as the parameters of an Extended Schmidt-transformed Gnomonic (ESG) mapping centered at (pdlat,pdlon) and twisted about this center by an azimuth angle of pdazi counterclockwise (these angles in degrees).
Like hgrid_ak_rx, return the grid points' cartesians xc and Jacobian matrices, xcd. Garea, the area of each grid cell, is also returned as in hgrid_ak_rx, and a failure flag, ff, raised when a failure occurs anywhere in these calculations.
[in] | lx | center-relative x grid index for left edge of the domain |
[in] | ly | center-relative y grid index for lower edge of the domain |
[in] | nx | numbers of the grid spaces in x |
[in] | ny | numbers of the grid spaces in y |
[in] | a | parameters of an ESG mapping |
[in] | k | parameters of an ESG mapping |
[in] | pdlat | degrees latitude of the projection center of the mapping |
[in] | pdlon | degrees longitude of the projection center of the mapping |
[in] | pdazi | azimuth of the orientation of the mapping at its center |
[in] | delx | central x-spacing of the grid in radians |
[in] | dely | central y-spacing of the grid in radians |
[out] | xc | grid points' earth-centered unit cartesians |
[out] | xcd | Jacobian matrices, d(xc)/d(xm) |
[out] | garea | array of grid-cell areas (steradians) |
[out] | ff | failure flag |