The large, ribbed base plate has only one socket for the spherical projection on the barrel.
2.
It would be a unique structure, with an exterior that is in effect a spherical projection screen.
3.
Projection required prismatic or " mirror box " converters in front of an ordinary spherical projection lens.
4.
Using a spherical projection screen instead will result in a closer analogy to the natural halo counterpart.
5.
The WCS standard includes many different spherical projections, including, for example, the HEALPix spherical projection widely used in observing the cosmic microwave background radiation.
6.
The WCS standard includes many different spherical projections, including, for example, the HEALPix spherical projection widely used in observing the cosmic microwave background radiation.
7.
Unlike the ellipsoidal Mercator and spherical Mercator, the Web Mercator is not quite conformal due to its use of ellipsoidal datum geographical coordinates against a spherical projection.
8.
The projection is used in the polar areas as part of the HEALPix spherical projection, which is widely used in physical cosmology in making maps of the cosmic microwave background, in particular by the WMAP and Planck space missions.
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