jtBaseApp/node_modules/@cesium/engine/Source/Core/TimeConstants.js

/**
 * Constants for time conversions like those done by {@link JulianDate}.
 *
 * @namespace TimeConstants
 *
 * @see JulianDate
 *
 * @private
 */
const TimeConstants = {
  /**
   * The number of seconds in one millisecond: <code>0.001</code>
   * @type {number}
   * @constant
   */
  SECONDS_PER_MILLISECOND: 0.001,

  /**
   * The number of seconds in one minute: <code>60</code>.
   * @type {number}
   * @constant
   */
  SECONDS_PER_MINUTE: 60.0,

  /**
   * The number of minutes in one hour: <code>60</code>.
   * @type {number}
   * @constant
   */
  MINUTES_PER_HOUR: 60.0,

  /**
   * The number of hours in one day: <code>24</code>.
   * @type {number}
   * @constant
   */
  HOURS_PER_DAY: 24.0,

  /**
   * The number of seconds in one hour: <code>3600</code>.
   * @type {number}
   * @constant
   */
  SECONDS_PER_HOUR: 3600.0,

  /**
   * The number of minutes in one day: <code>1440</code>.
   * @type {number}
   * @constant
   */
  MINUTES_PER_DAY: 1440.0,

  /**
   * The number of seconds in one day, ignoring leap seconds: <code>86400</code>.
   * @type {number}
   * @constant
   */
  SECONDS_PER_DAY: 86400.0,

  /**
   * The number of days in one Julian century: <code>36525</code>.
   * @type {number}
   * @constant
   */
  DAYS_PER_JULIAN_CENTURY: 36525.0,

  /**
   * One trillionth of a second.
   * @type {number}
   * @constant
   */
  PICOSECOND: 0.000000001,

  /**
   * The number of days to subtract from a Julian date to determine the
   * modified Julian date, which gives the number of days since midnight
   * on November 17, 1858.
   * @type {number}
   * @constant
   */
  MODIFIED_JULIAN_DATE_DIFFERENCE: 2400000.5,
};
export default Object.freeze(TimeConstants);