This is a brief introduction to observing at the CSO. (It remains a work in progress.)
Please review the Safety Information, preferably at sea level. At least two people are required whenever anyone is at the telescope.
At the altitude of the CSO, 4070 m (13350 ft), the air pressure is only about 60% of the sea level pressure. Consequently everyone will experience some degree of hypoxia and may experience symptoms of altitude sickness. If you experience headache, light-headedness, dizziness, weakness, fatigue, nausea, vomiting, etc., tell your observing partners. If symptoms persist, descend to HP as soon as possible. If the symptoms are severe, call 911 or Simon or Diana and descend and seek medical attention in Hilo immediately.
Do not let the Sun directly illuminate any part of the telescope structure.
Check this visually and with the CSO webcams.
When you start observing around sunset, keep the telescope pointed to the east (
In the morning after sunrise, keep the telescope pointed to the west (
az 270 or
Sunlight on the telescope structure will adversely affect the
pointing and efficiency
for you and subsequent observers.
Remote observations are allowed starting one hour after sunset and finishing one hour before sunrise.
UIP> shutter /close
stowcommand. Please do not let the Sun directly illuminate any part of the telescope structure. Check the CSO webcams.
UIP> sec /stop