2004/11/20 around 10:30 EST. A faint lower tangent arc, attached to a 22 degree halo, as seen from the air above Pennsylvania. Nikon coolpix 995 camera.

lower tangent arc and 22 degree halo, 2004/11/20

2003/2/13 17:39 EST. The following photos show a nice lower tangent arc (the ^ shaped arcs), as seen from a flight out of Atlanta. There is also a subsun immediately above the lower tangent arc. The real sun is outside the frame above the wing. Photos taken with Nikon coolpix 995 camera. The window was unfortunately quite dirty because of deicing, but there's not much I can do!

Such lower tangent arcs are less common, and can only be seen from the air because its altitude is below horizon.

Subsun and lower tangent arc, 2003/2/13

The bright spots in the lower tangent arc below are small water ponds on the ground, reflecting sunlight.

Subsun and lower tangent arc, 2003/2/13

Subparhelion, subsun, and lower tangent arc. 2003/2/13.

2003/2/13 17:53 EST. The subparhelion to the left side of the subsun occurred in the cloud below during a flight from Atlanta. It was elongated vertically. The real sun was above the wing, outside of the frame. At that time there was NO parhelion to the left of the real sun. There was also a lower tangent arc below the subsun. Nikon coolpix 995 digital camera.