sightliner - find sight lines for the sun and moon

Not quite released yet.

Here are the current positions of the celestial objects, above the horizon as seen from San Francisco:


% sl_data -planets -num 1 37.8 -122.4 | sl_find 'elev>0'
# datetime		object	bearing	elev	dist	full	sunsep	sunelev
30Aug2015 06:52:44 PDT	sun	80.2	2.1	151044	1.00	0.0	2.1
30Aug2015 06:52:44 PDT	moon	258.2	8.2	357	0.99	169.6	2.1
30Aug2015 06:52:44 PDT	venus	94.5	20.2	47554	0.08	22.9	2.1
30Aug2015 06:52:44 PDT	mars	85.9	24.4	376010	0.99	23.0	2.1
30Aug2015 06:52:44 PDT	jupiter	80.1	4.9	956967	1.00	2.9	2.1
    

Here are today's sun/moon rise/set times and bearings for San Francisco:


% sl_smrs 37.8 -122.4
30Aug2015:
Sunrise:  06:38 PDT (78.0°)
Sunset:   19:42 PDT (281.8°)
Moonrise: 20:25 PDT (91.3°)
Moonset:  07:41 PDT (265.5°)
    

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