[R] Package to generate moon phase - SR-SS

[Duncan Murdoch]

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.bats using 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
>