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2011 Sep 24
2
maptools::sunriset() daylight savings to stardard time change
...thus two values for Nov 6. (see below)
So I put a time value (noon) into the sequence, that did give me a correct date sequence.
2. When using that modified date sequence in maptools::sunriset(), on day of change to stardard time the sunrise time is shifted by one hour. (i.e. Nov5 8am, Nov6 6am, Nov7 7am)
I can't fathom why sunriset() is giving me funny results on the day of time change. I wonder if there is something amiss with how my windows XP is managing time zones perhaps? I would have expected sunriset() to be using just the day value from its dateTime argument, not the time componen...