text: 'use strict';
  
  
  module.exports = {
      /**
       * Standardize all missing data in calcdata to use undefined
       * never null or NaN.
       * That way we can use !==undefined, or !== BADNUM,
       * to test for real data
       */
      BADNUM: undefined,
  
      /*
       * Limit certain operations to well below floating point max value
       * to avoid glitches: Make sure that even when you multiply it by the
       * number of pixels on a giant screen it still works
       */
      FP_SAFE: Number.MAX_VALUE * 1e-4,
  
      /*
       * conversion of date units to milliseconds
       * year and month constants are marked "AVG"
       * to remind us that not all years and months
       * have the same length
       */
      ONEMAXYEAR: 31622400000, // 366 * ONEDAY
      ONEAVGYEAR: 31557600000, // 365.25 days
      ONEMINYEAR: 31536000000, // 365 * ONEDAY
      ONEMAXQUARTER: 7948800000, // 92 * ONEDAY
      ONEAVGQUARTER: 7889400000, // 1/4 of ONEAVGYEAR
      ONEMINQUARTER: 7689600000, // 89 * ONEDAY
      ONEMAXMONTH: 2678400000, // 31 * ONEDAY
      ONEAVGMONTH: 2629800000, // 1/12 of ONEAVGYEAR
      ONEMINMONTH: 2419200000, // 28 * ONEDAY
      ONEWEEK: 604800000, // 7 * ONEDAY
      ONEDAY: 86400000, // 24 * ONEHOUR
      ONEHOUR: 3600000,
      ONEMIN: 60000,
      ONESEC: 1000,
  
      /*
       * For fast conversion btwn world calendars and epoch ms, the Julian Day Number
       * of the unix epoch. From calendars.instance().newDate(1970, 1, 1).toJD()
       */
      EPOCHJD: 2440587.5,
  
      /*
       * Are two values nearly equal? Compare to 1PPM
       */
      ALMOST_EQUAL: 1 - 1e-6,
  
      /*
       * If we're asked to clip a non-positive log value, how far off-screen
       * do we put it?
       */
      LOG_CLIP: 10,
  
      /*
       * not a number, but for displaying numbers: the "minus sign" symbol is
       * wider than the regular ascii dash "-"
       */
      MINUS_SIGN: '\u2212'
  };
  