For me too: suncalc is the package.
Duncan Murdoc
On 07/03/2021 10:37 a.m., Jeff Newmiller wrote:
Odd.. came right up for me. Perhaps you might find rseek.org easier to use?
On March 7, 2021 5:03:20 AM PST, Neotropical bat risk assessments and acoustic tools
<neotropical.b...@gmail.com> wrote:
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
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