So just now, following your code I entered: >>> import ephem >>> moon = ephem.Moon() >>> moon.compute() >>> print moon.phase *and got* 41.6761169434
When I enter: >>> import datetime >>> import ephem >>> print(ephem.Moon(datetime.date.today()).moon_phase) *now I get* 0.31187416036 That's too large a difference between midnight and the actual time. I'm clearly confused or doing something wrong (or both). Plus that doesn't explain why weewx is still indicating 24% on Standard and Belchertown skins for me. Best, Phil On Saturday, September 15, 2018 at 7:53:44 PM UTC-4, gjr80 wrote: > > Likewise on the first part. > > Just now my pyephem enabled page shows 41%, a non-pyephem enabled VM shows > 34%, timeanddate.com shows 40.5%, best I could get from USNO is 41% but I > am not sure as of what time that is, it is just shown as a 'day' figure. > Pyephem gives me 40.5641403198% but that is using: > > >>> import ephem > >>> moon = ephem.Moon() > >>> moon.compute() > >>> print moon.phase > 40.5641403198 > > Your pyephem code gives me > > >>> import ephem > >>> print(ephem.Moon(datetime.date.today()).moon_phase) > 0.408785965463 > >>> datetime.date.today() > datetime.date(2018, 9, 16) > > but I suspect the variance there is because datetime.date.today() returns > a date with no time so I suspect that will mean pyephem returns the moon > phase at midnight today whereas ephem.Moon() will cause the current time > to be used instead. > > Might need to look into the non-pyephem page 34% value but all the others > seem completely consistent to me. > > Gary > > On Sunday, 16 September 2018 09:26:30 UTC+10, Thomas Keffer wrote: >> >> Can't help you with the first of your two questions. >> >> Regarding the second, when I look at my own skin >> <http://www.threefools.org/weewx/>, it shows 41% for today. Are you sure >> you're not looking at an old, perhaps cached, version? >> >> -tk >> >> On Sat, Sep 15, 2018 at 2:45 PM Philip Kutzenco <[email protected]> >> wrote: >> >>> I've noticed that some information from the DarkSky API as well as >>> calculated moon phase don't seem to be correct or consistent with other >>> sources of data on WeeWX. Here's what I have seen: >>> >>> *DarkSky API* - I display a minimal 8 day forecast on the Belchertown >>> Skin. When I pull down the values using the SPI directly with my lat and >>> long, the values pulled down match what the skin shows. However, If I go to >>> DarkSky.net using the same location, the values (like min & max temp, >>> weather icon, precip probability etc.) are usually very different. I'm >>> pretty tuned into the weather right now as I live in Western North Carolina >>> and will be impacted by the remains of Florence over the next several days. >>> What's going on with the DarkSky API? >>> >>> *Moon phase* - WeeWX shows the moon phase for today to be a waxing >>> crescent - 24% (I think that means 24% visible or illuminated). When I do >>> the calculation using python's ephem module - >>> *print(ephem.Moon(datetime.date.today()).moon_phase)* - the answer I >>> get for moon phase is 31.19%. I thought that WeeWX used ephem for that >>> calculation. On timeanddate.com today's moon phase is 39.5%. At >>> http://aa.usno.navy.mil, 37% of the moon is illuminated today. Why such >>> a variation? >>> >>> These two items are vexing me. Can someone help explain these anomalies? >>> >>> Phil >>> >>> -- >>> 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 [email protected]. >>> 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
