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CelestLab >> Geometry and events > CL_gm_pixelSize

CL_gm_pixelSize

Footprint dimensions for a conic sensor at an angle to the vertical

Calling Sequence

[f1,f2]=CL_gm_pixelSize(sat_alt,tilt,target_alt,[er])

Description

Parameters

sat_alt:

Satellite altitude [m] (1xN)

tilt:

Angle to the descending vertical [rad] (1xN)

target_alt:

(optional) Target altitude [m] (default is 0)(1xN)

er :

(optional) Planet radius (default is %CL_eqRad) [m]

f1:

Size factor in tilt plane(1xN)

f2:

Size factor in direction perpendicular to tilt plane(1xN)

Authors

See also

Examples

// Example 1
sat_alt = 700.e3;
tilt = CL_deg2rad(20);
[K1,K2]=CL_gm_pixelSize(sat_alt,tilt)
// same computation, with CL_gm_visiParams :
sat_radius = %CL_eqRad + sat_alt;
target_radius = %CL_eqRad;
// distance for the given tilt
[dist] = CL_gm_visiParams(sat_radius,target_radius,'sat',tilt,'dist')
// elevation for the given tilt
[elev] = CL_gm_visiParams(sat_radius,target_radius,'sat',tilt,'elev')
f1 = dist/(sat_alt * sin(elev))
f2 = dist/sat_alt
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