The three tables contain the coefficients
of the series developments
for generating the
coordinates of the celestial intermediate pole and
the quantity
s+XY/2 (and hence s) for the P03 precession model
(Capitaine
et al. 2003) with the IAU 2000A nutation. Each table
contains the
coefficients in microarcseconds (uas)
of the series
developments (i.e.
Fourier and Poisson terms) as functions of
(terrestrial) time
t (expressed in centuries since J2000.0) for the
quantities X, Y
and s+XY/2, respectively, retaining all terms where
the sum of the
absolute values of the two amplitude coefficients is at
least 0.1 uas.
The general formula for a quantity V is:
V = Sum_i)j=0,5 [(S{j})_i*t^j*sin(ARG) + C{j})_i*cos(ARG)]*t^j]
where, for X and
Y:
ARG = nl*l + nl'*l' + nF*F
+ nD*D + nOm*Om +nLMe*LMe
+ nLV*
+ nLMa*LMa
+ nLJ*LJ + nLS*LS + nLU*LU + nLN*LN +npa*pa ,
and, for s+XY/2:
ARG = nl*l + nl'*l' + nF*F + nD*D + nOm*Om
+ nLV*
l, l', F, D, Om, LMe,
fundamental lunisolar and planetary arguments of the nutation theory.
File
Summary:
--------------------------------------------------------------------------
FileName Lrecl Records
Explanations
--------------------------------------------------------------------------
ReadMe 80 .
This file
X_P03.dat 76
1606 terms in the series
development for the
quantity X, based on the P03 precession
Y_P03.dat 76
1281 terms in the series
development for the
quantity Y, based on the P03 precession
SXY2_P03.dat
55 72 terms in the series development for the
quantity s +XY/2, based on the P03
precession and IAU 2000A nutation
--------------------------------------------------------------------------
Note 1:
In the following descriptions of the file
formats, the column "Format"
contains the
Fortran edit descriptor that can be used when reading the
number. Integers are right-justified with leading
spaces. Floating
point quantities
have an explicit plus or minus sign and are decimal-
point aligned,
with the decimal point always present but with
insignificant
trailing zeroes replaced with spaces.
Note 2:
Table 3 replaces the s+XY/2 table provided
at:
http://vizier.u-strasbg.fr/viz-bin/Cat?J/A%2bA/450/855#sRM2.1
The two series are identical except that in
the new one the
constant term is
included and unused fundamental-argument
coefficients are
absent.
Byte-by-byte
Description of file: X_P03.dat,Y_P03.dat (Tables 1,2)
--------------------------------------------------------------------------
Bytes Format Units
Label Explanations
--------------------------------------------------------------------------
1- 4
I4 --- i Term number i
5- 6
I2 --- j
Order of the Poisson term (power of t)
7- 18 F12.2
uas Sji (S{j})_i coefficient, in uas
19- 34 F16.4
uas Cji (C{j})_i coefficient, in uas
35- 37 I5
--- nl Mean anomaly of the Moon coefficient
38- 40 I3
--- nl' Mean anomaly of the Sun coefficient
41- 43 I3
--- nF L - Omega (L: Mean longitude of the
Moon)
coefficient
44- 46 I3
--- nD Mean elongation from the Moon to the Sun
coefficient
47- 49 I3
--- nOm Mean longitude of the ascending node of
the Moon (Omega) coefficient
50- 52 I3
--- nLMe Mean longitude of Mercury coefficient
53- 55 I3
--- nLV Mean longitude of Venus coefficient
56- 58 I3
--- nLE Mean longitude of the Earth coefficient
59- 61 I3
--- nLMa Mean longitude of Mars coefficient
62- 64 I3
--- nLJ Mean longitude of Jupiter coefficient
65- 67 I3
--- nLS Mean longitude of Saturn coefficient
68- 70 I3
--- nLU Mean longitude of Uranus coefficient
71- 73 I3
--- nLN Mean longitude of
74- 76 I3
--- npa Accumulated general precession in
longitude coefficient
--------------------------------------------------------------------------
Byte-by-byte
Description of file: sXY2_P03.dat (Table
3)
--------------------------------------------------------------------------
Bytes Format Units
Label Explanations
--------------------------------------------------------------------------
1- 2
I2 --- i Term number i
3- 4
I2 --- j
Order of the Poisson term (power of t)
5- 13 F9.2
uas Sji (S{j})_i coefficient, in uas
14- 23 F10.2
uas Cji (C{j})_i coefficient, in uas
24- 27 I4
--- nl Mean anomaly of the Moon coefficient
28- 31 I4
--- nl' Mean anomaly of the Sun coefficient
32- 35 I4
--- nF L - Omega (L: Mean longitude of the
Moon)
coefficient
36- 39 I4
--- nD Mean elongation from the Moon to the Sun
coefficient
40- 43 I4
--- nOm Mean longitude of the ascending node of
the Moon (Omega) coefficient
44- 47 I4
--- nLV Mean longitude of Venus coefficient
48- 51 I4
--- nLE Mean longitude of the Earth coefficient
52- 55 I4
--- npa Accumulated general precession in
longitude coefficient
--------------------------------------------------------------------------
Reference:
Capitaine, N., Wallace, P.T., & Chapront J., A&A 412, 567 (2003)
==========================================================================
24-OCT-2006