19 lines
No EOL
486 B
Python
Executable file
19 lines
No EOL
486 B
Python
Executable file
#!/usr/bin/env python3
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import numpy as _np
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C_YEARS_TO_BLN_HOURS = (365.24 * 24) / 1_000_000_000
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def to_fits(reliability, time_yrs=5):
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time_hrs = time_yrs*C_YEARS_TO_BLN_HOURS
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return _np.log(reliability)/-time_hrs
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def to_rel(FITs, time_yrs=5):
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time_hrs = time_yrs*C_YEARS_TO_BLN_HOURS
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return _np.exp(-time_hrs * FITs)
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def to_urel(FITs, time_yrs=5):
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time_hrs = time_yrs*C_YEARS_TO_BLN_HOURS
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return 1-_np.exp(-time_hrs * FITs)
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from_fits=to_rel
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from_rel=to_fits |