0 (with the) an imaginary line (or one drawn on a map etc) passing round the globe, at an equal distance from the North and South poles -- rovník
Singapore is almost on the equator.
Flow approaching the sphere from upstream accelerates, forms a vortex jump beyond the equator and then decelerates slowly downstream under the action of viscosity.
This fluid flows around the sphere equator and is ejected as a jet, followed by a vortex jump, into the downstream slug.
It descends to the surface at around 308, between 208 and 358, and flows back to the equator.
Equator of the hemispheres is at eye level.
However, there was no apparent difference in the density of the gold particles above and below the equator.
There was even some evidence of a 'wave of darkening' spreading from the waning polar cap towards the equator.
In the analyses, northerly and southerly latitudes were both given positive values and hence represent distances from the equator.
Of course, we still need to move ten beams near the equator of the chamber, to make the direct drive configuration.