One of the best ways to see a glory is from an aircraft overflying liquid-water clouds. Sunlight is backscattered toward the sun by uniformly sized cloud droplets, in a process loosely akin to the visualization of a rainbow (but with far smaller water particles). When observing a true glory, your eyes always will lie on a straight line between its middle and the sun behind you. Put another way: when on a high bridge, skyscraper, airplane or mountain, look directly opposite the sun to spot any glory that might appear from clouds below. This striking example also had an outer ring, whose color ordering reverses that of the main glory.
Over northwestern OK (14 Jul 11), looking W.