Orbita Galileo

The program calculates the orbital characteristics of Galileo

Orbita Galileo. Manual

1. Get the Galileo almanac:

Valeriy Konin (2024). XML_GalYUMA (Galileo almanac) (https://www.mathworks.com/matlabcentral/fileexchange/162721-xml_galyuma-galileo-almanac)

2. Place the Galileo almanac in a folder In_dat.

3. Install:

Dat = 'In_dat/2024-02-23.yum';

dVar = datetime('2024-02-23T12:00:00.0Z', 'InputFormat', ...

'yyyy-MM-dd''T''HH:mm:ss.SSSZ','TimeZone','UTC');

lat = 0.88032730015257;

lon = 0.53109641675259;

hr=187.488;

step = 60;

L=24*3600 / step;

4. Run- Start_GAL.m

Comment

%Copyright:2024

%Questions and comments should be directed to Valeriy Konin at:

%Valeriy Konin, [e-mail]

%%Comment 1

%Name of the m-file: Start_GAL.m

%The program calculates the orbital characteristics of Galileo,

%Input data:

%files of almanac in Yuma format

%reference data

% dVar = datetime('2024-02-23T12:00:00.0Z', 'InputFormat', ...

%'yyyy-MM-dd''T''HH:mm:ss.SSSZ','TimeZone','UTC');

%receiver position coordinates -lat (latitude in radians),lon (longitude in radians,

%hr (height in meters);

%(step, seconds), step with which parameters are calculated

%number of points (L), in which the orbit parameters will be calculated

%L=12*3600/step, L reads so: number of hours (for example,12)

%number of seconds in one hour (3600) divided on one step (step)

%%Comment 2 Permanent:

%Earth rotation speed. Switching this setting changes

% image of the orbit on the graph

%%Comment 3 radii of the earth's ellipsoid

%%Comment 4 constants

%%Comment 5 Setting colors for graphics

%% Comment 6

Dat = 'In_dat/2024-02-23.yum';

dVar = datetime('2024-02-23T12:00:00.0Z', 'InputFormat', ...

'yyyy-MM-dd''T''HH:mm:ss.SSSZ','TimeZone','UTC');

%Comment 7 coordinates of the point from which the satellites are observed

%Comment 8 time step in seconds (300=5 minutes); step

% Comment 9 Mask angle (degree)

%%Comment 10 Reading an almanac

% Comment 10 Coefficients and transformation matrix

%%Comment 11 Coordinate transformation

%%Comment 12 center of mass of the Еarth

%%Comment 13 Start of the countdown of the current time

%%Comment 14 Calculation of satellite orbits

%%Comment 15

%%Reference to the almanac - the number in brackets indicates the ordinal number of the almanac parameter in the format YUMA

%%Comment 16 Ranges to satellites

% can change

%%Comment 13 number of samples

%%Comment 14 number of samples set

% before L to display a table of angles of visibility and azimuth

% %Comment 15 Zeroing arrays

%%Comment 16 solution of the Kepler equation

%Comment 17 satellite view angle calculation

%%Comment 17 navigation satellite number

%%Comment 18 calculation of satellite azimuth angles

%%Comment 19 Graphics