Here is an interesting read on Stargates and 19.47

In terms of Richard Hoagland's 'hyperdimensional physics' derived from the geometric 'message' of Cydonia (Mars), the conduit or 'stargate' between this world and the Otherworld (i.e. hyperspace) is prominently represented by the angle 19.5°. According to the theory, it is the tetrahedral geometry signified by this angle that enables inter-dimensional energy transfer between the two realms.

This 'stargate' geometry is expressed by a circumscribed tetrahedron (made up of four equilateral triangles). Interestingly enough, the hieroglyphic sign denoting Sirius was a triangle in ancient Egypt.

The connection is made evident by archaeo-astronomy. First, it is widely accepted these days that the 'air shafts' inside the Great Pyramid were designed to aligned with certain stars. One was specifically targeted toward Sirius in c. 2350 BC.

And at that pinpointed time (c. 2350 BC), Sirius and Orion's Alnitak (representing the Great Pyramid as per the Orion Correlation Theory) together produced the angle 19.5° (when Sirius was rising on the Giza horizon).[10]

Next, it is natural - given the Sirius-Great Bend connection - to wonder about the possibility of the Nile's 'Winding Waterway' having some relevance to tetrahedral geometry. Indeed, we do find a clear connection!

Believe it or not, the northern peak of the Great Bend precisely pinpoints the tetrahedral/stargate latitude, 19.5°N.!

What's even more incredible is the fact that the same Bend peak also pinpoints 33°E longitude. As those familiar with Hoagland's work would surely know, '33' and '19.5' are considered the two key numbers in the 'hyperdimensional code'! (Hoagland is just not yet aware of this Nile connection.)

In 1997, the esoteric importance of those numbers was overtly demonstrated as NASA landed a tetrahedron-shaped Mars Pathfinder lander on the Red Planet at 19.5 N and 33 W.! (That's pretty in your face, isn't it?)