How to using try and catch correctly to force loop go to next iteration?

So I know how the try and catch work, but it wont go to next iteration correctly.

I already know this line will casue problem becasue the input files,

[position, velocity] = states(sat, time, "CoordinateFrame", "ecef");

but there are too much so I dont have time to check each one

therefore I use try to hold the all main part of my loop

however after it got error and go into catch part, actually it will go to next iteration

it wont do the calculation for the next TLE file and output the [position, velocity] which I need

the value will stay in the first error one

how can I let it work correctly? thanks

%ISS NORAD ID (25544)
%2019/08/13
%2023/08/12
clc;
clear;
close all;
%% real time
% List of TLE file names
%tleFiles = ["satellite1.tle", "satellite2.tle", "satellite3.tle"];
for z = 1:7758
    fileName = sprintf('longlong%d.tle',z);  % Generate the file name
    tleFiles{z} = fileName;                 % Read the file contents
end
% Define the time range for propagsation
startTime = datetime(2019,8,13);
stopTime = datetime(2023,8,12);
sampleTime =86400;
timeRange = startTime:seconds(16261):stopTime;
% Create the satellite scenario
sc = satelliteScenario(startTime, stopTime, sampleTime);

% Loop through each TLE file    
for i = 1:7758
     try
        tleFile = tleFiles{i};
        tleFilePath = tleFile;
        [epochYearArray, month, day] = extractTLEData(tleFilePath);
    
   
        % Create the satellite object using the TLE file
        sat = satellite(sc, tleFile);
        
        % Calculate the year for the specified date
        year = 2000 + epochYearArray;
        
        % Specify the time for which you want to get position and velocity
        time = datetime(year, month, day, 12, 0, 0);

        % Compute position and velocity in ECEF coordinate frame
        [position, velocity] = states(sat, time, "CoordinateFrame", "ecef");

        % Display the results
        disp("TLE File: " + tleFile);
        position_realn(i) = (norm(position') / 1000) - 6371;
        velocity_realn(i) = norm(velocity') / 1000;
        disp(time);
        disp("Position (ECEF) [km]: " + position_realn(i));
        disp("Velocity (ECEF) [km/s]: " + velocity_realn(i));
        disp("-------------------------------");

    catch err
         disp("Error for TLE file " + tleFile + ": " + err.message);
    end
end
%play(sc)
%% SGP4

startTime = datetime(2019,8,13);
stopTime = datetime(2023,8,12);
sampleTime =86400;
sc1 = satelliteScenario(startTime,stopTime,sampleTime);

tleFile = "long1.tle";


satSGP4 = satellite(sc1,tleFile, ...
    "Name","satSGP4", ...
    "OrbitPropagator","sgp4");

satSDP4 = satellite(sc1,tleFile, ...
    "Name","satSDP4", ...
    "OrbitPropagator","sdp4");

[positionSGP4,velocitySGP4] = states(satSGP4,"CoordinateFrame", "ecef");
[positionSDP4,velocitySDP4] = states(satSDP4,"CoordinateFrame", "ecef");
for x=1:7758
    positionSGP4_n(x) = (norm(positionSGP4(:,x)')/1000)-6371;
    velocitySGP4_n(x) = norm(velocitySGP4(:,x)')/1000;
        
    
    positionSDP4_n(x) = (norm(positionSDP4(:,x)')/1000)-6371;
    velocitySDP4_n(x) = norm(velocitySDP4(:,x)')/1000;
end 
%v = satelliteScenarioViewer(sc1);
%play(sc1)
%% RelativePosition
re_pos_sgp4=abs(position_realn-positionSGP4_n);
re_pos_sgp4_mean = mean(re_pos_sgp4);
    
re_pos_sdp4=abs(position_realn-positionSDP4_n);
re_pos_sdp4_mean = mean(re_pos_sdp4);

test_r_p=(positionSDP4_n-positionSGP4_n);

figure;

subplot(2,1,1)
plot(timeRange,re_pos_sgp4,'r-',timeRange,re_pos_sgp4_mean,'b->')
xlim("auto");
ylim("auto");
ylabel('km');
title('RelativePosition:SGP4');

subplot(2,1,2)
plot(timeRange,re_pos_sdp4,'r-',timeRange,re_pos_sdp4_mean,'b->')
xlim("auto")
ylim("auto");
ylabel('km');
title('RelativePosition:SDP4');

Answer 1

[Bruno Luong]

Your try/catch works just fine, but your files are failed in the row. But as you are too lazy to check it is true or not it is just a speculation.

One experiment you could do is loop backward

for i = 7758:-1:1
    try
        ...
    catch
        ...
    end
end