The problem with skyfield is that it is dependent on numpy, a very large package. I'm reluctant to introduce a new dependency, especially such a large one, just to do almanac calculations.
And, as awkward as the pyephem API is, skyfield's is even worse. It requires loading multi-megabyte ephemeris tables before starting. This will complicate the install. Haven't decided yet. -tk On Wed, Feb 27, 2019 at 12:41 PM <kutze...@gmail.com> wrote: > Tom, > > My understanding is that pyephem is now deprecated (though it will > continue to be available and receive critical bug fixes). See > https://rhodesmill.org/pyephem/. The original developer has a replacement > package called skyfield (https://rhodesmill.org/skyfield/. He says it is > only missing Kelperian orbital elements for comets and asteroids > currently and that he is working to add that. Since you are working on a > Python3 compliant version of WeeWX, is that an opportunity to have WeeWX > use skyfield instead of pyephem? > > phil > > On Wednesday, February 27, 2019 at 2:08:39 PM UTC-5, Thomas Keffer wrote: >> >> I looked into this and found a couple of small issues, which I've >> corrected in commit c696e4 >> <https://github.com/weewx/weewx/commit/c696e468efce806214cd560e1014cb50d382c68c> >> . >> >> Be aware that the function you are using does the calculation in local >> time. This has now been changed, and the almanac now uses UTC. >> >> Finally, it uses a very simple algorithm, which assumes a constant >> synodic month of 29.530588 days. In practice, it can vary by 1% or more >> over the years. So, all results will necessarily be approximate. >> >> -tk >> >> On Wed, Feb 27, 2019 at 6:26 AM HoracioDos <rose...@gmail.com> wrote: >> >>> Hello. >>> I have pyephem installed and Weewx shows "Last quarter" for today Feb >>> 27, 2019 but it was yestarday (Feb 26, 2019). I guess it should be "Waning >>> Crescent" for today. When does moon phases change? >>> if i run: >>> python -c "import weeutil.Moon;print weeutil.Moon.moon_phase(2019,2,27)" >>> I get this >>> (6, 38) >>> Thanks in advance! >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "weewx-user" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to weewx-user+...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
