$LastChangedDate: 27-Juil-2011 $

# CL_init

Initialization of CelestLab data

## Calling Sequence

       CL_init([init_glob])

## Description

- Initializes CelestLab data.

  These data consist of physical quantities and other constants.

  The data are defined in 4 files (in the %CL_home/data/utils directory):

  - physical_data.scd: physical data.

  - constants.scd: miscellaneous data (don't normally change).

  - planetary_data.scd: planetary data.

  - TAI_UTC.scd: leap seconds between TAI and UTC.

- The data once read are stored in variables whose names begin with "%CL_".

  These variables are defined as globals and returned to the caller as locals.

  The data are the following:

  - The data names from physical_data.scd and constants.scd ("data.xxx = ...") become %CL_xxx.

  - The planetary data from planetary_data.scd (data.planet = [...]) are stored in a structure called %CL_planetC. %CL_planetC.planet contains the fields: {mu: gravitational constant, eqRad: equatorial radius, obla: oblateness}

  - The data from TAI_UTC.scd are stored in a matrix "%CL_TAI_UTC" containing the 3 columns defined in the file: beginning of interval (JD1950.0), end of interval (JD1950.0), number of leap seconds (seconds).

## Parameters

init_glob:

  (boolean) Specifies if global variables are defined and initialized (%t by default).

## Authors

- CNES - DCT/SB