* BROADLY USED PARAMETERS:
*_________________________________________________
* i/o file unit numbers
      INTEGER kout, kin 
* output
      PARAMETER(kout=53)
* input
      PARAMETER(kin=12)
*_________________________________________________
* altitude, wavelength grids
      INTEGER kz, kw
* altitude
      PARAMETER(kz=101)
* wavelength
      PARAMETER(kw=650)
*_________________________________________________
* number of weighting functions
      INTEGER ks, kj
*  wavelength dependent
      PARAMETER(ks=60)
*  wavelength and altitude dependent
      PARAMETER(kj=181)

* delta for adding points at beginning or end of data grids
      REAL deltax
      PARAMETER (deltax = 1.E-4)

* some constants...

* pi:
      REAL pi
      PARAMETER(pi=3.1415926535898)

* radius of the earth:
      REAL radius
      PARAMETER(radius=6.371E+3)

* largest number of the machine:
      REAL largest
      PARAMETER(largest=1.E+36)
