Very high altitude extreme night shift work is a class 2A carcinogen that may result in lifelong disabling sleep disorders, high cholesterol, radiation sickness and heart, lung and brain damage.

Extreme night shift work in high altitude astronomy is easily avoidable by using a split night shift where the first night shift starts before sunset and finishes at midnight and the second night shift starts with a new fresh person working through to after sunrise.

High altitude astronomy is a strange world of oxygen starvation, sleep deprivation and radiation sickness.

Research suggests that sea level adapted humans that work at the very high altitude 13,796 feet summit of Mauna Kea may eventually develop sleep apnea and fatigue from the low oxygen environment.

The most deformed AC voltage sine wave that I have seen in my career was at a high altitude astronomical observatory where I worked for almost three years. I eventually became so sick sitting next to the electrical room daily that I had no option but to leave.

I stopped snowboarding as I started to recognize symptoms that corresponded with radiation sickness when at high altitude ski resorts.