CL_op_repeatGroundTracks

Description

• Computes the longitudes of the ground tracks (at a reference latitude) of a repeat orbit.

  res contains :

  - first column : res(:,1) : orbit number

  - second column : res(:,2) : number of orbital days in the cycle

  - third column : res(:,3) : longitude gap between first ground track and current ground track (rad)

  - fourth column : res(:,4) : longitude gap between first ground track and current ground track expressed in reference longitude gaps, where reference longitude gap = 2*%pi/(N*Q+P)

Parameters

N:

Value of N (1x1)

P:

Value of P (1x1)

Q:

Value of Q (1x1)

option:

(optional) 0 = all longitudes, 1 = successive longitudes in [0; DL[, 2 = successive longitudes in [-DL/2; DL/2[ such that gap with initial longitude is decreasing. Default is 1. (1x1)

res:

see description (Mx4)

Authors

• CNES - DCT/SB

See also

• CL_op_searchRepeatOrbits

• CL_op_repeat2smaInc

Examples

// number of longitude reference gaps // versus number of orbital days : N = 15; P = 3; Q = 16; res = CL_op_repeatGroundTracks(N,P,Q); plot(res(:,2),res(:,4),'s'); // number of longitude reference gaps versus // number of orbital days (decreasing values) : res = CL_op_repeatGroundTracks(N,P,Q,option=2); plot(res(:,2),res(:,4),'s');