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Python: small performance improvement in _iau2000b.

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Don Cross
2019-07-04 15:32:15 -04:00
parent 59f23226b6
commit 0909aeeddd
3 changed files with 3 additions and 9 deletions
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source/python/astronomy.py
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@@ -479,14 +479,12 @@ class _iau2000b:
om = math.fmod((450160.398036 - t * 6962890.5431), _ASEC360) * _ASEC2RAD
dp = 0
de = 0
i = 76
while i >= 0:
for i in range(77):
arg = math.fmod((_nals_t[i][0]*el + _nals_t[i][1]*elp + _nals_t[i][2]*f + _nals_t[i][3]*d + _nals_t[i][4]*om), _PI2)
sarg = math.sin(arg)
carg = math.cos(arg)
dp += (_cls_t[i][0] + _cls_t[i][1] * t)*sarg + _cls_t[i][2]*carg
de += (_cls_t[i][3] + _cls_t[i][4] * t)*carg + _cls_t[i][5]*sarg
i -= 1
self.dpsi = -0.000135 + (dp * 1.0e-7)
self.deps = +0.000388 + (de * 1.0e-7)