Portal:Spaceflight/Selected article/Week 48 2007
SA-3 (Apollo) of the same year.
Once the flight tests on the rockets were complete, after the first stage shutoff (at 65 miles in altitude for the first flight and 104 miles for the second), the water-filled upper stages were exploded causing 95 tons of water to be ejected into the upper atmosphere. The resulting massive ice clouds expanded to several miles in diameter and lightning-like effects were recorded. The 'Highwater' experiment, was intended to investigate the effects on the ionosphere of the sudden release of a great volume of water, however poor telemetry on the second flight made the results questionable. (more...)