suntables.py

#! /usr/bin/python
# -*- coding: utf-8 -*-

#	Copyright (C) 2014  Enno Rodegerdts

#  This program is free software; you can redistribute it and/or modify
#     it under the terms of the GNU General Public License as published by
#     the Free Software Foundation; either version 2 of the License, or
#     (at your option) any later version.
#
#     This program is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU General Public License for more details.
#
#     You should have received a copy of the GNU General Public License along
#     with this program; if not, write to the Free Software Foundation, Inc.,
#     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

#import ephem
#import math
from alma_ephem import *




def sunmoontab(date):
    """generates LaTeX table for sun and moon
    """
    tab = r'''\noindent
    \begin{tabular*}{0.2\textwidth}[t]{@{\extracolsep{\fill}}|c|rr|}
    '''
    d = 0
    while d < 3:
        tab = tab + r'''\hline
        \hline
        \multicolumn{1}{|c|}{\textbf{%s}} &\multicolumn{1}{c}{\textbf{GHA}} &\multicolumn{1}{c|}{\textbf{Dec}}\\
        \hline
        ''' %(ephem.date(date+d).datetime().strftime("%d"))
        da = date+d
        h = 0
        while h < 24:
            eph = sunmoon(da)
            line = "%s & %s & %s \\\ \n" %(h,eph[0],eph[1])
            tab = tab + line
            h += 1
            da = da+ephem.hour
        vd = vdmean(date+d)
        tab = tab + r"""\hline
        & \multicolumn{1}{c}{SD.=%s} & \multicolumn{1}{c|}{d=%s} \\
        \hline
        """ %(vd[1],vd[0])
        d = d + 1
    tab = tab+r"""\end{tabular*}"""
    return tab



def page(date):
    """creates a page(15 days) of the Sun almanac
    """
    page = r"""\sffamily
    \noindent



    \begin{flushright}
    \textbf{%s to %s}
    \end{flushright}

    \begin{scriptsize}
    """ %(ephem.date(date).datetime().strftime("%Y %B %d"),ephem.date(date+14).datetime().strftime("%b. %d"))
    page = page + sunmoontab(date)
    page = page + sunmoontab(date+3)
    page = page + sunmoontab(date+6)
    page = page + sunmoontab(date+9)
    page = page + sunmoontab(date+12)
    page = page + r"""\end{scriptsize}
    \newpage



    """
    return page


def pages(date,p):
    """make i pages beginning with date"""
    d = ephem.date(date)
    out = ''
    for i in range(p):
        out = out + page(d)
        d = d +15
    return out

def almanac(year):
    """make almanak from date til date"""
    alm = r"""\documentclass[10pt, twoside, a4paper]{report}
    \usepackage[utf8x]{inputenc}
    \usepackage[english]{babel}
    \usepackage{fontenc}
    \usepackage[ top=25mm, bottom=25mm, left=18mm, right=8mm]{geometry}
    \setlength{\parindent}{0pt}
    \newcommand{\HRule}{\rule{\linewidth}{0.5mm}}
    \usepackage[pdftex]{graphicx}
    \usepackage{multicol}

    \begin{document}

        \begin{titlepage}
    \begin{center}
    \textsc{\Large Generated by PyAlmanac-st599}\\[1.5cm]
    \includegraphics[width=0.4\textwidth]{./images/Ra}\\[1cm]
    \textsc{\huge The Nautical Almanac for the Sun}\\[0.7cm]
    \HRule \\[0.6cm]
    { \Huge \bfseries %s}\\[0.4cm]
    \HRule \\[1.5cm]
    \vfill
    {\large Generated: \today}
    \HRule \\[0.6cm]
    \end{center}

    \begin{description}\tiny

    \item[Disclaimer:] These are computer generated tables. Use at your own risk.
    The software and the tables generated by the software are without any warranty
    whatsoever, please see the GNU Public Licence v.2 for more information.
    \end{description}

    \end{titlepage}

    \vfill
    Generated using PyAlmanac-st599 which is available via Github: https://github.com/st599/Pyalmanac

    Pyalmanac-st599 is a Python script that creates the daily pages of the Nautical Almanac. These are tables that are needed for celestial navigation with a Sextant.

    This fork of the original code (which can be found at: https://github.com/rodegerdts/Pyalmanac) aims to include a brief guide to celestial navigation and tables of other numbers required to take a sextant measurement and produce a line of position.

    \section*{WARNING}

    These tables are generated without warranty or guarantee and should be used with caution. The original author states on his web page (https://sv-inua.net/the-nautical-almanac) that he has tested the code against a 2009 Nautical Almanac (which is published by the UK and US) and could not find any errors over 0.3'.
    Requirements

    Most of the heavy computing is done by the free Pyephem library. Typesetting is done by TeX/LaTeX So before you can use this program you need to install:
    \begin{itemize}
    \item Python v2.x (2.6 or later ) python 3 will not work out of the box
    \item PyEphem
    \item TeX/LaTeX
    \end{itemize}

    \include{./additional_pages/navigational_maths}

	\newpage
    """ %(year)
    y = ephem.date(str(year))
    alm = alm + pages(y,25)
    alm = alm + '\end{document}'
    return alm