CL_gm_equatorialOverlap

Description

• This function is deprecated.

  Replacement function: CL_op_equatorialSwath

• Computes the ratio Q = Leq/Ded where:

  - Leq: portion of the equator seen by a sensor during the time it crosses the equator.

  - Deq: gap between 2 consecutive ground tracks at equator.

• Notes:

  - The planet is assumed spherical, and the orbit circular.

  - The sensor is conic and oriented towards the descending vertical.

  - The gap between 2 consecutive ground tracks is computed taking the effect of J2 into account.

  - The result is undefined (%nan) if inclination is 0 or %pi.

Parameters

alt:

Satellite's altitude [m] (1xN or 1x1)

inc:

Orbit's inclination [rad](1xN or 1x1)

view_angle:

Sensor half view angle = angle from the descending vertical [rad] (1xN or 1x1)

eq_overlap:

ratio (1xN)

Authors

• CNES - DCT/SB

Bibliography

• 1) Satellites orbites et missions - Michel Capderou

See also

• CL_gm_equatorialSwath

Examples

alt = [822.e3 630.e3] ; inc = [CL_deg2rad(98.72) CL_deg2rad(96.72)]; view_angle = [CL_deg2rad(50.5) CL_deg2rad(30.5)]; [eq_overlap] = CL_gm_equatorialOverlap(alt,inc,view_angle);