Name

CL_gm_locSolTime — Local solar time

Calling Sequence

   locSolTime = CL_gm_locSolTime(pos,sun_dir)
   
   

Description

  • Computes local solar time (locSolTime) given satellite position (pos) and sun direction (sun_dir) in the same frame.
  • Last update : 11/01/2008

Parameters

pos:

satellite position [m] (3xN)

sun_dir:

sun direction vector in same frame as pos (3xN)

locSolTime:

local solar time, angle in ]-pi, pi] (0 rad for 12h(noon)) [rad] (1xN)

Authors

CNES - DCT/SB

Examples

cjd = CL_dat_cal2cjd(2008,10,25)
pos = [ 7378.e3 ; 0 ; 0];                        // sat position in G50 on october 25 2008
[sun_dir,rs] = CL_mod_moonSunG50(cjd,'s');     // sun position in G50 on the same date
locSolTime = CL_gm_locSolTime(pos,sun_dir)      // local solar time (angle)
locSolTime_hours = (locSolTime+%pi)*24/(2*%pi)   // local solar time (hours)