Continuous observations of solar activity are made possible by a global network of NISP telescopes. At any given time, between 1 and 4 of our telescopes are observing the Sun simultaneously from different locations on earth. A parallax effect is observed by combining pairs of simultaneous observations. Early astronomers used the parallax effect to calculate the earth-sun distance.
To prepare for the upcoming Venus Transit, we've projected Venus' path (using JPL ephemeris calculations) on to actual recent H-Alpha wavelength solar images from Big Bear and Mauna Loa telescope sites. The resulting stereo images are equivalent to having one eye in California, and the other eye in Hawaii, giving a 3D perspective.
This movie can be viewed with standard red/cyan 3D glasses. June 6th 2012, movies similar to these of the actual transit will be made available.