def premier_da_la_annee(jd): '''Determine the year in the French revolutionary calendar in which a given Julian day falls. Returns Julian day number containing fall equinox (first day of the FR year)''' p = ephem.previous_fall_equinox(dublin.from_jd(jd)) previous = trunc(dublin.to_jd(p) - 0.5) + 0.5 if previous + 364 < jd: # test if current day is the equinox if the previous equinox was a long time ago n = ephem.next_fall_equinox(dublin.from_jd(jd)) nxt = trunc(dublin.to_jd(n) - 0.5) + 0.5 if nxt <= jd: return nxt return previous
def _to_jd_equinox(an, mois, jour): day_of_adr = (30 * (mois - 1)) + (jour - 1) equinoxe = ephem.next_fall_equinox(str(an + YEAR_EPOCH)) return trunc(dublin.to_jd(equinoxe.real) - 0.5) + 0.5 + day_of_adr
def update_daily_info(self): # current time, used in many of following calculations rn = datetime.datetime.now(tz=pytz.timezone(self.otto_info['tz'])) # get sun times for 3 days otto_sun_yesterday = astral.sun.sun(self.otto_obs, datetime.datetime.today() - datetime.timedelta(days=1), tzinfo=self.otto_info['tz']) otto_sun_today = astral.sun.sun(self.otto_obs, datetime.datetime.today(), tzinfo=self.otto_info['tz']) otto_sun_tomorrow = astral.sun.sun(self.otto_obs, datetime.datetime.today() + datetime.timedelta(days=1), tzinfo=self.otto_info['tz']) # compute day lengths day_length_yesterday = otto_sun_yesterday[ 'sunset'] - otto_sun_yesterday['sunrise'] self.day_length_yesterday_str = self.daylen_tostr(day_length_yesterday) day_length_today = otto_sun_today['sunset'] - otto_sun_today['sunrise'] self.day_length_today_str = self.daylen_tostr(day_length_today) day_length_tomorrow = otto_sun_tomorrow['sunset'] - otto_sun_tomorrow[ 'sunrise'] self.day_length_tomorrow_str = self.daylen_tostr(day_length_tomorrow) # compute how much longer today was vs yesterday, change delta text color self.yesterday_today_delta_str = self.daydelta_tostr( day_length_today - day_length_yesterday) if self.yesterday_today_delta_str[1] == '+': self.ids.yest_delta.color = (0, 1, 0, self.alpha) else: self.ids.yest_delta.color = (1, 0, 0, self.alpha) # compute how much longer tomorrow will be vs today, change delta text color self.today_tomorrow_delta_str = self.daydelta_tostr( day_length_tomorrow - day_length_today) if self.today_tomorrow_delta_str[1] == '+': self.ids.tom_delta.color = (0, 1, 0, self.alpha) else: self.ids.tom_delta.color = (1, 0, 0, self.alpha) # update today's date self.date = rn.strftime('%Y.%m.%d') # compute PST or PDT completion percentage daylight_trans_dates = [ x.date() for x in pytz.timezone('US/Pacific')._utc_transition_times if x.year >= rn.year - 1 and x.year <= rn.year + 1 ] # has daylight times last year to next year if rn.date( ) < daylight_trans_dates[2]: # before this year's spring forward) # useful dates are last year's fall back and this year's spring forward. currently PST pst_duration_days = daylight_trans_dates[2] - daylight_trans_dates[ 1] pst_completed_days = rn.date() - daylight_trans_dates[1] self.pdt_or_pst_completion_str = f'PST is {pst_completed_days/pst_duration_days*100:.2f}% done.' elif rn.date( ) < daylight_trans_dates[3]: # between [spring forward and fall back) # useful dates: this year's spring forward, fall back. currently PDT :) pdt_duration_days = daylight_trans_dates[3] - daylight_trans_dates[ 2] pdt_completed_days = rn.date() - daylight_trans_dates[2] self.pdt_or_pst_completion_str = f'PDT is {pdt_completed_days/pdt_duration_days*100:.2f}% done.' else: # you're after this year's fall back] # useful dates: this year's fall back, next year's spring forward. currently PST pst_duration_days = daylight_trans_dates[4] - daylight_trans_dates[ 3] pst_completed_days = rn.date() - daylight_trans_dates[3] self.pdt_or_pst_completion_str = f'PST is {pst_completed_days/pst_duration_days*100:.2f}% done.' # find next 2 important yearly transitions. include time changes, equinoxes, solstices year_transitions = [['spring forward', daylight_trans_dates[2]], ['fall back', daylight_trans_dates[3]]] year_transitions.append([ 'spring equinox', ephem.next_spring_equinox(str(rn.year)).datetime().date() ]) year_transitions.append([ 'summer solstice', ephem.next_summer_solstice(str(rn.year)).datetime().date() ]) year_transitions.append([ 'fall equinox', ephem.next_fall_equinox(str(rn.year)).datetime().date() ]) year_transitions.append([ 'winter solstice', ephem.next_winter_solstice(str(rn.year)).datetime().date() ]) year_transitions.append(['spring forward', daylight_trans_dates[4]]) year_transitions.append([ 'spring equinox', ephem.next_spring_equinox(str(rn.year + 1)).datetime().date() ]) # sort the transitions. (are these astronomical events always guaranteed to be in the same order?) year_transitions.sort(key=lambda x: x[1]) year_transitions = [x for x in year_transitions if rn.date() <= x[1]] self.year_transition_1 = f'{year_transitions[0][0]} {year_transitions[0][1].strftime("%Y.%m.%d")} ' \ f'Δ{(year_transitions[0][1] - rn.date()).days}d' self.year_transition_2 = f'{year_transitions[1][0]} {year_transitions[1][1].strftime("%Y.%m.%d")} ' \ f'Δ{(year_transitions[1][1] - rn.date()).days}d'
def __init__(self, latitude: str, longitude: str, timezone: str, year: str, name: str): """Take the all necessary location/year/body name information and construct plot-ready astronomical body time series for calendar. Attributes are all set and ready for queries/plotting after __init__. Arguments: latitude = latitude in decimal degrees as a string, i.e. '36.9577' longitude = longitude in decimal degrees as a string, i.e. '-122.0402' timezone = tzdata/IANA time zone as a string, i.e. 'America/Los_Angeles' year = the year desired for the calendar, as a string, i.e. '2016' name = the name of the astronomical body as a string, first letter capitalized, i.e. 'Sun' or 'Moon' """ self.latitude = latitude self.longitude = longitude self.timezone = timezone self.year = year self.name = name observer = ephem.Observer() observer.lat = ephem.degrees(latitude) observer.long = ephem.degrees(longitude) observer.elevation = 0 begin, end = utc_year_bounds(timezone, year) step = 10 * ephem.minute #resolution of full timeseries of body heights alltimes, allheights = fill_in_heights(begin, end, step, observer, name, append_NaN=False) '''Convert to pandas timeseries and localize the time index.''' assert(len(allheights) == len(alltimes)) hei = pd.Series(allheights, alltimes) hei.index = hei.index.tz_localize('UTC') hei.index = hei.index.tz_convert(timezone) self.altitudes = hei # ----------------- Special attributes for Sun and Moon ---------------- '''Equinox and solstice events for Sun''' if name == 'Sun': spring = ephem.next_spring_equinox(year) summer = ephem.next_summer_solstice(year) fall = ephem.next_fall_equinox(year) winter = ephem.next_winter_solstice(year) event_times = [spring.datetime(), summer.datetime(), fall.datetime(), winter.datetime()] event_names = ['spring equinox', 'summer solstice', 'fall equinox', 'winter solstice'] events = pd.Series(event_names, event_times) events.index = events.index.tz_localize('UTC') events.index = events.index.tz_convert(timezone) self.events = events '''Daily phase (% illuminated, 28-day icon ID) for Moon''' if name == 'Moon': moon = ephem.Moon() illuminated = [] observer.date = begin + 22 * ephem.hour # 10 pm local time Jan 1 moon.compute(observer) while observer.date < end: illuminated.append(moon.moon_phase) observer.date += 1 moon.compute(observer) daily_times = pd.date_range(year + '-01-01', year + '-12-31', tz = timezone) assert(len(illuminated) == len(daily_times)) self.percent_illuminated = pd.Series(illuminated, daily_times) cycle_days = [] moon_day = begin + 22 * ephem.hour # 10 pm local time Jan 1 while moon_day < end: cycle_days.append(get_lunation_day(moon_day)) moon_day += 1 assert(len(cycle_days) == len(daily_times)) self.phase_day_num = pd.Series(cycle_days, daily_times) exact_names = [] exact_times = [] nowdate = begin if cycle_days[0] < 14: next_full = ephem.next_full_moon(nowdate) exact_times.append(next_full.datetime()) exact_names.append('full') nowdate = next_full while nowdate < end: next_new = ephem.next_new_moon(nowdate) exact_times.append(next_new.datetime()) exact_names.append('new') nowdate = next_new next_full = ephem.next_full_moon(nowdate) exact_times.append(next_full.datetime()) exact_names.append('full') nowdate = next_full half_phases = pd.Series(exact_names, exact_times) half_phases.index = half_phases.index.tz_localize('UTC') half_phases.index = half_phases.index.tz_convert(timezone) self.half_phases = half_phases