Summary Table of Open and Available Time

This table simple summarizes the amount of possible time each semester and the amount of time the APF was allowed to be open.

• The first column is the semester.
• Total represents the total number of hours of darkness, defined as between -9 degree sunset to -9 degree sunrise, over the month.
• OK gives the number of hours it was determined to be ok to open the telescope. Reasons for closure may include weather or engineering issues.

Year	A Total(hr)	A OK(hr)	B Total(hr)	B OK(hr)
2015			1571.50	735.79
2016	1682.38	1122.25	2094.87	1139.91
2017	1644.95	963.06	2106.26	1260.57
2018	1652.69	1026.23	2068.34	1052.32
2019	1676.17	800.36	2119.24	1208.31
Average	1664.05	977.98	1992.04	1079.38

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