daylength               package:pheno               R Documentation

_D_a_y_l_e_n_g_t_h _a_t _j_u_l_i_a_n _d_a_y _i _o_n _l_a_t_i_t_u_d_e _l

_D_e_s_c_r_i_p_t_i_o_n:

     Calculates daylength [h] and declination angle delta [radians] on
     day i [julian day of year] for latitude l [degrees].

_U_s_a_g_e:

     daylength(i,l)

_A_r_g_u_m_e_n_t_s:

       i: Integer as julian day of year (1-365)

       l: Float as latitude [degress]

_V_a_l_u_e:

      dl: daylength [h]

   delta: declination angle [degrees]

_A_u_t_h_o_r(_s):

     Joerg Schaber

_E_x_a_m_p_l_e_s:

             daylength(120,63)

