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rinexe.m
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rinexe.m
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function rinexe(ephemerisfile, outputfile)
%RINEXE Reads a RINEX Navigation Message file and
% reformats the data into a matrix with 21
% rows and a column for each satellite.
% The matrix is stored in outputfile
%Typical call: rinexe('pta.96n','pta.nav')
%Kai Borre 04-18-96
%Copyright (c) by Kai Borre
%$Revision: 1.0 $ $Date: 1997/09/24 $
% Units are either seconds, meters, or radians
fide = fopen(ephemerisfile);
head_lines = 0;
while 1 % We skip header
head_lines = head_lines+1;
line = fgetl(fide);
answer = findstr(line,'END OF HEADER');
if ~isempty(answer), break; end;
end;
head_lines
noeph = -1;
while 1
noeph = noeph+1;
line = fgetl(fide);
if line == -1, break; end
end;
noeph = noeph/8
frewind(fide);
for i = 1:head_lines, line = fgetl(fide); end;
% Set aside memory for the input
svprn = zeros(1,noeph);
weekno = zeros(1,noeph);
t0c = zeros(1,noeph);
tgd = zeros(1,noeph);
aodc = zeros(1,noeph);
toe = zeros(1,noeph);
af2 = zeros(1,noeph);
af1 = zeros(1,noeph);
af0 = zeros(1,noeph);
aode = zeros(1,noeph);
deltan = zeros(1,noeph);
M0 = zeros(1,noeph);
ecc = zeros(1,noeph);
roota = zeros(1,noeph);
toe = zeros(1,noeph);
cic = zeros(1,noeph);
crc = zeros(1,noeph);
cis = zeros(1,noeph);
crs = zeros(1,noeph);
cuc = zeros(1,noeph);
cus = zeros(1,noeph);
Omega0 = zeros(1,noeph);
omega = zeros(1,noeph);
i0 = zeros(1,noeph);
Omegadot = zeros(1,noeph);
idot = zeros(1,noeph);
accuracy = zeros(1,noeph);
health = zeros(1,noeph);
fit = zeros(1,noeph);
for i = 1:noeph
line = fgetl(fide); %
svprn(i) = str2num(line(1:2));
year = line(3:6);
month = line(7:9);
day = line(10:12);
hour = line(13:15);
minute = line(16:18);
second = line(19:22);
af0(i) = str2num(line(23:41));
af1(i) = str2num(line(42:60));
af2(i) = str2num(line(61:79));
line = fgetl(fide); %
IODE = line(4:22);
crs(i) = str2num(line(23:41));
deltan(i) = str2num(line(42:60));
M0(i) = str2num(line(61:79));
line = fgetl(fide); %
cuc(i) = str2num(line(4:22));
ecc(i) = str2num(line(23:41));
cus(i) = str2num(line(42:60));
roota(i) = str2num(line(61:79));
line=fgetl(fide);
toe(i) = str2num(line(4:22));
cic(i) = str2num(line(23:41));
Omega0(i) = str2num(line(42:60));
cis(i) = str2num(line(61:79));
line = fgetl(fide); %
i0(i) = str2num(line(4:22));
crc(i) = str2num(line(23:41));
omega(i) = str2num(line(42:60));
Omegadot(i) = str2num(line(61:79));
line = fgetl(fide); %
idot(i) = str2num(line(4:22));
codes = str2num(line(23:41));
weekno = str2num(line(42:60));
L2flag = str2num(line(61:79));
line = fgetl(fide); %
svaccur = str2num(line(4:22));
svhealth = str2num(line(23:41));
tgd(i) = str2num(line(42:60));
iodc = line(61:79);
line = fgetl(fide); %
tom(i) = str2num(line(4:22));
spare = line(23:41);
spare = line(42:60);
spare = line(61:79);
end
status = fclose(fide)
% Description of variable eph.
eph(1,:) = svprn;
eph(2,:) = af2;
eph(3,:) = M0;
eph(4,:) = roota;
eph(5,:) = deltan;
eph(6,:) = ecc;
eph(7,:) = omega;
eph(8,:) = cuc;
eph(9,:) = cus;
eph(10,:) = crc;
eph(11,:) = crs;
eph(12,:) = i0;
eph(13,:) = idot;
eph(14,:) = cic;
eph(15,:) = cis;
eph(16,:) = Omega0;
eph(17,:) = Omegadot;
eph(18,:) = toe;
eph(19,:) = af0;
eph(20,:) = af1;
eph(21,:) = toe;
fidu = fopen(outputfile,'w');
count = fwrite(fidu,[eph],'double');
fclose('all')