The description of programs "radiants.f" and "elements.f"
---------------------------------------------------------

The detailed description is also given in the paper:
Neslusan L., Rudawska R., Hajdulova M., Durisova S., Jopek T.J.: 2024,
"The computer programs to check the internal consistency of the
meteor-shower data". In: Contributions of the Astronomical Observatory
Skalnate Pleso, submitted.

Note: The programs are written in the Fortran77 language. The static
binaries executable codes of both programs (suffix ".exes") are provided
with the Fortran source code. These codes can be run on whatever 64-bit
CPU under the OS UNIX/Linux.


radiants.f
==========
Using the orbital elements, q, e, omega, Omega, and i, this code
calculates: solar longitude, right ascension and declination of
geocentric radiant, and geocentric velocity. The calculated quantities
are compared with their observed counterparts and too large deviations
are written to an extra output file (see below).

INPUT:
   (1) data file "inparams.rad" with the parameters characterizing the
specific requirements. The description of each value that must be
specified in this file is given in the previous line directly in
"inparams.rad";
   (2) data file with the mean geocentric and orbital characteristics
of individual solutions of showers (its name in the template is
"allshowers11jan2023.db"; otherwise the name can be specified in
"inparams.rad"). This file should be prepared before the running of the
program. The characteristics of one solution should be given in one
line. There must be 12 columns with 12 parameters. These are:

IAU - the IAU No. of shower {integer}
AdNo - the additional number characterizing the shower solution
  {integer}; IAU and AdNo serve as the unique identification codes of
  given solution
LS - mean solar longitude [deg] {real}
R.A. - mean right ascension of geocentric radiant [deg] {real}
DEC - mean declination of geocentric radiant [deg] {real}
Vg - mean geocentric velocity [km/s] {real}
q - mean perihelion distance [au] {real}
e - mean eccentricity [1] {real}
arg. - mean argument of perihelion [deg] {real}
node - mean longitude of ascending node [deg] {real}
i - mean inclination [deg] {real}
n - number of meteors in given solution {integer}

OUTPUT:
   (1) List of the calculated geocentric quantities of all considered
showers (all their solutions). Each solution is characterized with the
IAU No. of shower and the AdNo, which are preceded with a serial number.
In the fourth to seventh columns there are given: solar longitude [deg],
right ascension and declination of geocentric radiant [deg], and
geocentric velocity [km/s]. These are given in two lines, whereby the
observed values (i.e. the values published by the original author) are
in the first and the calculated values in the second line. In the last
columns of the second line, there is indicated the method of the
modification of orbit to cross the orbit of the Earth (Q, B, W, A, H, P;
the description can be found in Neslusan L. et al.: 1998, A&A 331, 411;
1998A&A...331..411N). The name of this file in the template is
"check_geo.d"; it can be specified in the input file "inparams.rad".
   (2) List of parameters, which were found to be outside of the
specified tolerance (the specification should be done in
"inparams.rad"). Each deviation is given in one line; this line contains
the IAU No. of shower, AdNo. of its solution, observed (original) value
of the erroneous parameter and the corresponding re-calculated value.
The name of this file in the template is "errors_geo.inf"; it can be
specified in "inparams.rad".
   (3) "debug.rad" - this file is written only when its occurrence is
required in "inparams.rad". It contains all the calculated parameters,
by all methods for every solution. Basically, there are three values in
a given line: observed (original), re-calculated for the post-perihelion,
and re-calculated for the pre-perihelion arc of the solution's mean
orbit. Either the re-calculated value for the post-perihelion or that
for the pre-perihelion arc should agree with its observed counterpart.

------------------------------------------------------------------------

elements.f
==========
Using the solar longitude, equatorial coordinates of geocentric radiant,
and geocentric velocity, the program calculates the orbital elements,
q, e, arg., node, and i. The calculated quantities are compared with
their observed counterparts and too large deviations are written to an
extra output file (see below).

INPUT:
   (1) data file "inparams.ele" with the parameters characterizing the
specific requirements. The description of each value that must be
specified in this file is given in the previous line;
   (2) data file with the mean geocentric and orbital characteristics of
individual solutions of showers (its name in the template is
"allshowers11jan2023.db"; otherwise the name can be specified in
"inparams.ele"). This file should be prepared before the running of the
program. It is the same as the input file for the program "radiants.f".

OUTPUT:
   (1) List of the calculated prbital elements of all considered showers
(all their solutions). Each solution is characterized with the serial
number, IAU No. of shower and the AdNo of solution. Again, IAU No. and
AdNo. are the unique identification codes of the solution. In the fourth
to eighth columns there are given: perihelion distance [au],
eccentricity, argument of perihelion [deg], longitude of ascending node
[deg], and inclination [deg]. These are given in two lines, whereby the
observed (original) values are in the first and the re-calculated values
in the second line. The name of this file in the template is
"check_orb.d"; it can be specified in the input file "inparams.ele".
   (2) List of parameters, which were found to be outside of the
specified tolerance (the specification should be done in "inparams.ele").
Each deviation is given in one line; this line contains the IAU No. of
shower, AdNo. of its solution, observed (original) value of the erroneous
parameter and the corresponding re-calculated value. The name of this
file in the template is "errors_orb.inf"; it can be specified in
"inparams.ele".