Module rfa::rfam

Constants

• ERFA_SRS
  Schwarzschild radius of the Sun (au) = 2 * 1.32712440041e20 / (2.99792458e8)^2 / 1.49597870700e11
• URSA_AULT
  Light time for 1 au (s)
• URSA_CMPS
• URSA_D2PI
  2Pi
• URSA_DAS2R
  Arcseconds to radians
• URSA_DAU
  Astronomical unit (m, IAU 2012)
• URSA_DAYSEC
  Seconds per day.
• URSA_DC
  Speed of light (au per day)
• URSA_DD2R
  Degrees to radians
• URSA_DJ00
  Reference epoch: f64 = J2000.0;, Julian Date
• URSA_DJC
  Days per Julian century
• URSA_DJM
  Days per Julian millennium
• URSA_DJM0
  Julian Date of Modified Julian Date zero
• URSA_DJM00
  Reference epoch: f64 = J2000.0;, Modified Julian Date
• URSA_DJM77
  1977 Jan 1.0 as MJD
• URSA_DJY
  Days per Julian year
• URSA_DMAS2R
  Milliarcseconds to radians
• URSA_DPI
  Pi
• URSA_DR2AS
  Radians to arcseconds
• URSA_DR2D
  Radians to degrees
• URSA_DS2R
  Seconds of time to radians
• URSA_DTY
  Length of tropical year B1900: f64 = days;
• URSA_ELB
  L_B = 1 - d(TDB)/d(TCB), and TDB (s) at TAI 1977/1/1.0
• URSA_ELG
  L_G = 1 - d(TT)/d(TCG)
• URSA_GRS80
• URSA_TDB0
• URSA_TTMTAI
  TT minus TAI (s)
• URSA_TURNAS
  Arcseconds in a full circle
• URSA_WGS72
• URSA_WGS84
  Reference ellipsoids

Functions

• ursa_dint
  URSA_DINT- truncate to nearest whole number towards zero (double)
• ursa_dnint
  URSA_DNINT(A) - round to nearest whole number (double)
• ursa_dsign
  URSA_DSIGN(A,B) - magnitude of A with sign of B (double)
• ursa_gmax
  max(A,B) - larger (most +ve) of two numbers (generic)
• ursa_gmin
  min(A,B) - smaller (least +ve) of two numbers (generic)