I’m doing coordinate system transformation using the ecef2enu function. But for some reason, all three E, N, and U values are the same. I wonder why. How can I modify it to get the exact value?
Isn’t it normal for the 1, 2, 3 matrices to have different values? Is there something wrong with my code?

currTime = gnss.SensorModel.InitialTime;
setup(scene)
wgs84 = wgs84Ellipsoid(‘meter’);
while scene.IsRunning

[~,~,p,satPos,status] = gnss.read ();
allSatPos = gnssconstellation(currTime); % ecef
currTime = currTime + seconds(1/scene.UpdateRate);

[~,trueRecPos] = plat.read; % lla
trueRecPos_ecef = lla2ecef(trueRecPos); % uav ecef
[az,el] = lookangles(trueRecPos,satPos,gnss.SensorModel.MaskAngle);
nsat = length(satPos(:,1));
enu_sat = zeros(nsat,3);
for k = 1:1:nsat
enu_sat(k,:) = ecef2enu(satPos(k,1),satPos(k,2),satPos(k,3),trueRecPos(1),trueRecPos(2),trueRecPos(3),wgs84);
end
temp=1;
unit_sat = normalize(enu_sat,’norm’,1);
target_z = 500;
scale_factors = target_z ./ unit_sat(:,3);
unit_sat_scaled = unit_sat .* scale_factors;
endI’m doing coordinate system transformation using the ecef2enu function. But for some reason, all three E, N, and U values are the same. I wonder why. How can I modify it to get the exact value?
Isn’t it normal for the 1, 2, 3 matrices to have different values? Is there something wrong with my code?

currTime = gnss.SensorModel.InitialTime;
setup(scene)
wgs84 = wgs84Ellipsoid(‘meter’);
while scene.IsRunning

[~,~,p,satPos,status] = gnss.read ();
allSatPos = gnssconstellation(currTime); % ecef
currTime = currTime + seconds(1/scene.UpdateRate);

[~,trueRecPos] = plat.read; % lla
trueRecPos_ecef = lla2ecef(trueRecPos); % uav ecef
[az,el] = lookangles(trueRecPos,satPos,gnss.SensorModel.MaskAngle);
nsat = length(satPos(:,1));
enu_sat = zeros(nsat,3);
for k = 1:1:nsat
enu_sat(k,:) = ecef2enu(satPos(k,1),satPos(k,2),satPos(k,3),trueRecPos(1),trueRecPos(2),trueRecPos(3),wgs84);
end
temp=1;
unit_sat = normalize(enu_sat,’norm’,1);
target_z = 500;
scale_factors = target_z ./ unit_sat(:,3);
unit_sat_scaled = unit_sat .* scale_factors;
end I’m doing coordinate system transformation using the ecef2enu function. But for some reason, all three E, N, and U values are the same. I wonder why. How can I modify it to get the exact value?
Isn’t it normal for the 1, 2, 3 matrices to have different values? Is there something wrong with my code?

currTime = gnss.SensorModel.InitialTime;
setup(scene)
wgs84 = wgs84Ellipsoid(‘meter’);
while scene.IsRunning

[~,~,p,satPos,status] = gnss.read ();
allSatPos = gnssconstellation(currTime); % ecef
currTime = currTime + seconds(1/scene.UpdateRate);

[~,trueRecPos] = plat.read; % lla
trueRecPos_ecef = lla2ecef(trueRecPos); % uav ecef
[az,el] = lookangles(trueRecPos,satPos,gnss.SensorModel.MaskAngle);
nsat = length(satPos(:,1));
enu_sat = zeros(nsat,3);
for k = 1:1:nsat
enu_sat(k,:) = ecef2enu(satPos(k,1),satPos(k,2),satPos(k,3),trueRecPos(1),trueRecPos(2),trueRecPos(3),wgs84);
end
temp=1;
unit_sat = normalize(enu_sat,’norm’,1);
target_z = 500;
scale_factors = target_z ./ unit_sat(:,3);
unit_sat_scaled = unit_sat .* scale_factors;
end optimization, gnss, ecef2enu, enu, ecef MATLAB Answers — New Questions

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