Hi all
I have not found a package by Googling, but assume there must be at
least one out there.
I need to generate/write sun rise-sun set times (civil twilight) and
moon phase/illumination.
I would like to add a start date and end date along with location
coordinates and have a table generated like below.
This is from a legacy program acquired some 30 years ago and is no
longer available. This can only generate 1 month at a time (subset
below). But for a year at a time both historical and for future dates
and locations.
For this legacy program I enter the date and select a location I have in
a simple TXT location file location with time-zone and X-Y coordinates
and it will generate a month at a time. this can be dumped to the
clipboard but not written as a TXT or delimited file.
I am hoping there will be an elegant way to do this in R and have the
results written to a file for import into an Access DB.
Tnx for any suggestions on package(s).
Sample below.
Sun and Moon Data for March 2021
17.05°N 88.57°W 5hrW
Standard Time Civil Twilight
Sun Moon
Date Twi. Rise Transit Set Twi. Rise Transit Set %
3/1/2021 06:50 07:12 13:07 19:01 19:23 21:36 02:52 09:04 92
3/2/2021 06:50 07:11 13:06 19:01 19:23 22:35 03:43 09:47 85
3/3/2021 06:49 07:11 13:06 19:02 19:23 23:35 04:35 10:31 76
3/4/2021 06:48 07:10 13:06 19:02 19:24 ***** 05:28 11:18 65
--
Bruce W. Miller, PhD.
Neotropical bat risk and acoustic assessments
Conservation Fellow - Wildlife Conservation Society
Research Associate, American Museum of Natural History
If we lose the bats, we may lose much of the tropical vegetation and the lungs
of the planet
Using acoustic sampling to identify and map species distributions
and pioneering acoustic tools for ecology and conservation of bats for >25
years.
Key projects include providing free interactive identification keys and call
fact sheets for the vocal signatures of New World Bats
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