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aer2geodetic

Local spherical AER to geodetic

Syntax

  • [lat,lon,h] = aer2geodetic(az,elev,slantRange,lat0,lon0,h0,spheroid) example
  • [___] = aer2geodetic(___,angleUnit)

Description

example

[lat,lon,h] = aer2geodetic(az,elev,slantRange,lat0,lon0,h0,spheroid)) returns geodetic coordinates corresponding to coordinates az, elev, slantRange in a local spherical system. Any of the first six numeric input arguments can be scalar, even when the others are nonscalar; but all nonscalar numeric arguments must match in size.

[___] = aer2geodetic(___,angleUnit) adds angleUnit which specifies the units of inputs az, elev, lat0, lon0, and outputs lat, lon.

Examples

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Zermatt to the Matterhorn

Compute the latitude, longitude and orthometric height of the summit of the Matterhorn (Monte Cervino) from its azimuth, elevation and (slant) range relative to Zermatt, Switzerland. All distances and lengths are in meters.

Origin (reference point): Zermatt.

fmt = get(0,'Format');
format short g

lat0 = dm2degrees([46  1])	% convert degree-minutes to degrees
lon0 = dm2degrees([ 7 45])
hOrthometric0 = 1620;
hGeoid = 53;
h0 = hOrthometric0 + hGeoid
lat0 =

       46.017


lon0 =

         7.75


h0 =

        1673

Azimuth, elevation, and slant range to Matterhorn summit.

az = 237.8;
elev = 18.755;
slantRange = 8871.7;

Latitude, longitude, and ellipsoidal height of summit.

[lat, lon, hEllipsoidal] = aer2geodetic( ...
    az, elev, slantRange, lat0, lon0, h0, wgs84Ellipsoid)
lat =

       45.976


lon =

       7.6583


hEllipsoidal =

         4531

Orthometric height of summit.

hGeoid = 53;
hOrthometric = hEllipsoidal - hGeoid
format(fmt)
hOrthometric =

         4478

Input Arguments

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az — Azimuth angles scalar value | vector | matrix | N-D array

Azimuth angles in the local spherical system, specified as a scalar, vector, matrix, or N-D array. Azimuths are measured clockwise from north. Values must be in units that match the input argument angleUnit, if supplied, and in degrees, otherwise.

Data Types: single | double

elev — Elevation angles scalar value | vector | matrix | N-D array

Elevation angles in the local spherical system, specified as a scalar, vector, matrix, or N-D array. Elevations are with respect to a plane perpendicular to the spheroid surface normal. Values must be in units that match the input argument angleUnit, if supplied, and in degrees, otherwise.

Data Types: single | double

slantRange — Distances from local originscalar value | vector | matrix | N-D array

Distances from origin in the local spherical system, returned as a scalar, vector, matrix, or N-D array. The straight-line, 3-D Cartesian distance is used. Units are determined by the LengthUnit property of the spheroid input.

Data Types: single | double

lat0 — Geodetic latitude of local originscalar value | vector | matrix | N-D array

Geodetic latitude of local origin (reference) point(s), specified as a scalar value, vector, matrix, or N-D array. In many cases there is one origin (reference) point, and the value of lat0 is scalar, but it need not be. (It may refer to a moving platform, for example). Values must be in units that match the input argument angleUnit, if supplied, and in degrees, otherwise.

Data Types: single | double

lon0 — Longitude of local originscalar value | vector | matrix | N-D array

Longitude of local origin (reference) point(s), specified as a scalar value, vector, matrix, or N-D array. In many cases there is one origin (reference) point, and the value of lon0 is scalar, but it need not be. (It may refer to a moving platform, for example). Values must be in units that match the input argument angleUnit, if supplied, and in degrees, otherwise.

Data Types: single | double

h0 — Ellipsoidal height of local originscalar value | vector | matrix | N-D array

Ellipsoidal height of local origin (reference) point(s), specified as a scalar value, vector, matrix, or N-D array. In many cases there is one origin (reference) point, and the value of h0 is scalar, but it need not be. (It may refer to a moving platform, for example). Units are determined by the LengthUnit property of the spheroid input.

Data Types: single | double

spheroid — Reference spheroidscalar referenceEllipsoid | oblateSpheroid | referenceSphere object

Reference spheroid, specified as a scalar referenceEllipsoid, oblateSpheroid, or referenceSphere object.

angleUnit — Units of angles'degrees' (default) | 'radians'

Units of angles, specified as ‘degrees' (default), or 'radians'.

Data Types: char

Output Arguments

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lat — Geodetic latitudesscalar value | vector | matrix | N-D array

Geodetic latitudes of one or more points, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the input argument angleUnit, if supplied; values are in degrees, otherwise. When in degrees, they lie in the closed interval [-90 90].

lon — Longitudesscalar value | vector | matrix | N-D array

Longitudes of one or more points, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the input argument angleUnit, if supplied; values are in degrees, otherwise. When in degrees, they lie in the interval [-180 180].

h — Ellipsoidal heightsscalar value | vector | matrix | N-D array

Ellipsoidal heights of one or more points, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the LengthUnit property of the spheroid object

See Also

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