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%% 扣除系统延时，得到测量TOF，包含大气延时等还未修正的量
clear all;clc;close all
c=299792458;% m/s
load('rec_c1.mat')
load('rec_c2.mat')
load('rec_c3.mat')
load('rec_c4.mat')
% 探测器各通道延时，先不考虑所有通道的数据，
% 对单个通道进行数据精度进行统计
load('mu_channel1.mat')
load('mu_channel2.mat')
load('mu_channel3.mat')
load('mu_channel4.mat')
% 判断第1通道是否测量到在阈值范围的数据并赋值
if length(rec_c1)==0
t_c1=[];TOF_c1=[];residual_c1=[];
else
t_c1=rec_c1(:,1);
TOF_c1=rec_c1(:,2)-mu_channel1*10^-9;
residual_c1=rec_c1(:,4)-mu_channel1;
end
% 判断第2通道是否测量到在阈值范围的数据并赋值
if length(rec_c2)==0
t_c2=[];TOF_c2=[];residual_c2=[]
else
t_c2=rec_c2(:,1);
TOF_c2=rec_c2(:,2)-mu_channel2*10^-9;
residual_c2=rec_c2(:,4)-mu_channel2;
end
% 判断第3通道是否测量到在阈值范围的数据并赋值
if length(rec_c3)==0
t_c3=[];TOF_c3=[];residual_c3=[];
else
t_c3=rec_c3(:,1);
TOF_c3=rec_c3(:,2)-mu_channel3*10^-9;
residual_c3=rec_c3(:,4)-mu_channel3;
end
% 判断第4通道是否测量到在阈值范围的数据并赋值
if length(rec_c4)==0
t_c4=[];TOF_c4=[];residual_c4=[];
else
t_c4=rec_c4(:,1);
TOF_c4=rec_c4(:,2)-mu_channel4*10^-9;
residual_c4=rec_c4(:,4)-mu_channel4;
end
% 扣除系统延时得到TOF和O-C残差
t0=[t_c1;t_c2;t_c3;t_c4];
TOF0=[TOF_c1;TOF_c2;TOF_c3;TOF_c4];
residual0=[residual_c1;residual_c2;residual_c3;residual_c4];
% 对信号进行识别
oo = 3; %设定搜索框的大小：ns
[t1 p1] = sort([t0]); %对记录时刻进行排序
% pos = find(t1>4.7e4);
% t1 = t1(pos);
residual1 = (residual0(p1));
% residual1 = residual1(pos);
TOF1 = TOF0(p1);
% TOF1 = TOF1(pos);
w = 0;
%一阶直线搜索回波信号
for i = -0.1:0.001:0.1 %斜率范围
for j=-50:0.1:50 %截距
y=i*(t1-min(t1))+j;
w1 = [];
w1 = find(residual1>y&residual1<(y+oo));
ww = length(w1);
if w<ww
w = ww;
p = i; %斜率
q = j; %截距
w2 = w1; %记录位置信息
end
end
end
t2 = t1(w2);
residual2 = residual1(w2);
TOF2 = TOF1(w2);
y=p*(t1-min(t0))+q;
% 对搜索网格内的残差进行2.5σ滤波n次，得到认为是回波信号的TOF3
n=10; %滤波次数
for k=1:n
residual20=[];
[p2,S2]=polyfit(t2-min(t2),residual2,1);
[y_fit2,delta2]=polyval(p2,t2-min(t2),S2);
for l=1:length(delta2)
if abs(residual2(l)-y_fit2(l))<2.5*delta2(l)
residual20(l)=residual2(l);
end
end
w2=find(residual20);
t3=t2(w2);
residual3=residual2(w2);
TOF3=TOF2(w2);
end
figure
plot(t1-min(t0),residual1,'.','MarkerSize',12);
hold on
plot(t3-min(t0),residual3,'.r','MarkerSize',12);
ylim([-100 100])
set(gca,'FontSize',40);
xlabel('Time [s]','fontsize',40);
ylabel('O-C residual [ns]','fontsize',40);
start_hour = floor(min(t3)/3600);
start_second = floor((min(t3) - 3600 * start_hour)/60);
end_hour = floor(max(t3)/3600);
end_second = floor((max(t3) - 3600 * start_hour)/60);
% 对回波信号数据TOF3进行多项式拟合，当n与n+1阶拟合标准差之差小于1mm时，n阶进行拟合，得到标准差
degree=[];
for n=1:100
[p3,S3]=polyfit(t3,TOF3,n);
[y_fit3,delta3]=polyval(p3,t3,S3);
rms(n)=mean(delta3)*c/2;
degree=[degree;n rms(n)*100];
if n>1&abs(rms(n)-rms(n-1))<1e-3%判断当n与n+1阶拟合标准差的差值是否小于
break
end
end
figure
plot(t3,y_fit3,'-r','MarkerSize',20)
set(gca,'FontSize',40);
xlabel('Time/s','fontsize',40);
ylabel('RTT/s','fontsize',40);
legend('Observed RRT', 'Polynomial fitting')
% TOF-拟合后曲线得到残差residual4
residual4 = (TOF3 - y_fit3)*1e9;%ns
t4 = t3;
TOF4 = TOF3;
figure
plot(t4,residual4,'.r','MarkerSize',12);
set(gca,'FontSize',40);
xlabel('Time/seconds','fontsize',40);
ylabel('Residual/ns','fontsize',40);
% figure
% histogram(residual4,'BinWidth',0.02) %柱状图bin大小选取20ps
% set(gca,'FontSize',40);
% xlabel('O-C residual/s','fontsize',40);
% ylabel('Photon counts','fontsize',40);
% %% 生成frd文本，格式需要修改% fid=fopen([num2str(YR),num2str(MONTH),num2str(DATE),temp(end-2:end),'_','_residual.txt'],'w');%写入文件路径
%
% [r,l]=size(spc); % 得到矩阵的行数和列数
% for i=1:r
% for j=1:l
% fprintf(fid,'%5.12f\t',spc(i,j));
% end
% fprintf(fid,'\r\n');
% end
% fclose(fid);
% B = [t4 TOF4];
% % data_name = dir("*.a1*");
% % if length(data_name) == 0
% % data_name = dir("*.l1*")
% % end
% % endsWith(data_name.name,".a11")
% fid=fopen(['d:\LLR\','L21.txt'],'w');%写入文件路径
%
% [r,c]=size(B); % 得到矩阵的行数和列数
% for i=1:r
% for j=1:c
% fprintf(fid,'%5.12f\t',B(i,j));
% end
% fprintf(fid,'\r\n');
% end
% fclose(fid);
%% %% 算出标准点NP
load('pre_data.mat')
c=299792458;%光速
sl=120;%标准点步长选取
gnt=[];
gnd=[];
% NP_xy=[];
for i=1:ceil((max(t4)-min(t4))/sl)
w5=find((min(t4)+sl*(i-1))<=t4&t4<(min(t4)+sl*i));
if length(w5) == 0
break
else
t5=t4(w5);
residual5=residual4(w5);
TOF5=TOF4(w5);
[p5,S5]=polyfit(t5,residual5,1);
[y_fit5,delta5]=polyval(p5,t5,S5);
RMS1_NP(i)=std(residual5)*c*1e-9/2;
t_me=mean(t5);
ct=[];
for j=1:length(w5)
ct(j)=abs(t5(j)-t_me);
end
w6=find(ct==min(ct));%离平均时刻最近点
gnt=[gnt;t5(w6(1)) TOF5(w6(1)) mean(delta5)*c*1e-9/2];
t_np=gnt(:,1);
x=pre_data(2:end,9)*24*3600;
y=pre_data(2:end,10);
addpath('/home/z8/文档/潮汐修正/test file')
delta=(gnt(:,2)-lagint(x,y,gnt(:,1),10))/2*c;
h=floor(t5(w6)/3600)+8;
end
end
%% 检核 @GCRS -- version 2
% Load P.T.H. data
pth_file = dir('*.pth');
fid = fopen(pth_file.name,'r');
pthdata = fscanf(fid,'%f %f %f %f');
wavelength = 1.064; %um
latitude = 22.34639411111111; % °
height = 0.405713; % km
baroPressure = pthdata(2) * 1e2; % Pa
temperature = pthdata(3); % ℃
RH = pthdata(4); %
data_and_reflector=dir('*.la1');
if length(data_and_reflector) == 0
data_and_reflector=dir('*.la2');
end
temp = data_and_reflector.name;
YR = str2num(temp(1:4));
MONTH = str2num(temp(5:6));
DATE = str2num(temp(7:8));
% coordinate_station_itrs=[-2358691.210,5410611.484,2410087.607];
% Read SP3 data
sp3name=dir('*.sp3');
T=importdata(sp3name.name,' ',22,0);
for i=1:length(T.data(:,1))/3
sp3t(i,:)=T.data(3*i-2,:);
sp3xyz(i,:)=T.data(3*i-1,:);
sp3v_xyz(i,:)=T.data(3*i,:);
end
sp3yyyy=sp3t(:,1);sp3mt=sp3t(:,2);sp3d=sp3t(:,3);sp3h=sp3t(:,4);sp3m=sp3t(:,5);sp3s=sp3t(:,6); %年月日时分秒
sp3t_s=sp3h*3600+sp3m*60+sp3s; %转化为日积秒
sp3x=sp3xyz(:,1);sp3y=sp3xyz(:,2);sp3z=sp3xyz(:,3); %卫星（x,y,z）坐标
w7 = find(DATE == sp3d);
sp3x_w7=sp3x(w7);sp3y_w7=sp3y(w7);sp3z_w7=sp3z(w7); sp3t_s_w7=sp3t_s(w7);%测量卫星（x,y,z）坐标,时间（t）
sp3t_h_w7=sp3h(w7);sp3t_m_w7=sp3m(w7);sp3t_ss_w7=sp3s(w7);
% Coordinates of satellite in ITRS
xsate_itrs = [sp3x_w7,sp3y_w7,sp3z_w7];
xsate_gcrs = [];
t_up_down = [];
pos_sat_bound = [];
o_minus_c = [];
% if coeff
% coeff = [0 0 ];
for i = 1:length(gnt(:,1))
% syms delta_x delta_y delta_z
hour(i) = floor(gnt(i,1)/3600);
minu(i) = floor((gnt(i,1) - hour(i) * 3600)/60);
sec(i) = gnt(i,1) - hour(i) * 3600 - minu(i) * 60;
% Calculation tide correction in meter
addpath('/home/z8/文档/潮汐修正/test file')
dxtide = solid_tide_dehan(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxotide = ocean_tide_hardisp(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxptide = solid_ptide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxatide = atm_tide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxoptide = ocean_ptide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607];
coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
% 以TOF/2作为初始值
t_up = gnt(i,2)/2;
for j = 1:4
% Time bias
delta_t = 0;
addpath('/home/z8/文档/潮汐修正/test file')
sp3_IntpX_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,1),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
sp3_IntpY_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,2),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
sp3_IntpZ_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,3),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
sp3_IntpXYZ_ITRS = [sp3_IntpX_ITRS;sp3_IntpY_ITRS;sp3_IntpZ_ITRS];
IT2GC = ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i));
format long g
sp3_IntpXYZ_GCRS= IT2GC * sp3_IntpXYZ_ITRS;
coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
dxyz_itrs = sp3_IntpXYZ_ITRS - coordinate_station_itrs;
dxyz_gcrs = sp3_IntpXYZ_GCRS - coordinate_station_gcrs;
% norm(dxyz_itrs) - norm(dxyz_gcrs)
dxt = dxyz_itrs(1);
dyt = dxyz_itrs(2);
dzt = dxyz_itrs(3);
STAT_LONG=113.55421725;
STAT_LAT=22.34639411111111;
STAT_HEI=405.713;
STAT_LONGrad = deg2rad(STAT_LONG);
STAT_LATrad = deg2rad(STAT_LAT);
sp3R = norm(dxyz_gcrs);
gvs(1) = cos(STAT_LATrad)* cos(STAT_LONGrad); % Station X unit vector
gvs(2) = cos(STAT_LATrad)* sin(STAT_LONGrad); % Station Y unit vector
gvs(3) = sin(STAT_LATrad); % Station Z unit vector
dstn = norm(gvs); % Normalise the unit vectors
czd = (dxt*gvs(1)+dyt*gvs(2)+dzt*gvs(3))/(sp3R*dstn); % Zenith height component of SAT->STAT vector / vector range
altc = asin(czd)*360.0/(2.0*pi);
correction = atmospheric_refraction(altc, baroPressure, temperature);
elevationAngle = altc + correction;
addpath('/home/z8/文档/潮汐修正/大气延时和引力延时修正')
atm_delay = MPAtmDelayModelCal(wavelength,latitude,height,baroPressure,temperature,RH,elevationAngle);
addpath('/home/z8/文档/潮汐修正/大气延时和引力延时修正')
gravity_delay = gra_delay(YR,MONTH,DATE,hour(i),minu(i),sec(i),sp3_IntpXYZ_ITRS);
com_corr = 0.251;
t_up0 = (sp3R + atm_delay + gravity_delay - com_corr)/c;
t_up = t_up0;
if (abs(t_up - t_up0) > 1e-12)
t_up = t_up0;
else
t_up = t_up0;
break
end
end
t_down = gnt(i,2)/2;
for k = 1:4
WGS84_EARTH_ANGULAR_VELOCITY = 7.292115e-5; % rad/s
updt = WGS84_EARTH_ANGULAR_VELOCITY * t_up ;
downdt = WGS84_EARTH_ANGULAR_VELOCITY * t_down;
% syms t_down
IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_down+t_up));
coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs;
sp3R = norm(dxyz);
t_down0 = (sp3R + atm_delay + gravity_delay - com_corr)/c;
f = (sp3R + atm_delay + gravity_delay - com_corr)/c - t_down;
%solve
delta_t_down = abs(t_down0 - t_down);
% t_down = double(solve(f));
t_down = t_down0;
if delta_t_down<1e-12
break
end
end
t_up_down = [t_up_down;t_down,t_up];
resi = (gnt(i,2) - (t_down + t_up)) * c;
o_minus_c = [o_minus_c;resi];
pos_sat_bound = [pos_sat_bound;sp3_IntpXYZ_GCRS'];
end
std(o_minus_c)
%% 测站偏心修正计算
load('pre_data')
pre_utc=pre_data(:,9)*24*3600 - 0.5;
pre_TOF=pre_data(:,10);
dev_pre_TOF = [pre_data(2,10)-pre_data(1,10);pre_data(2:end,10) - pre_data(1:end-1,10)]/2;
vel_radi_meas = lagint(pre_utc,dev_pre_TOF,gnt(:,1),10) * c;
coeff = polyfit(vel_radi_meas,o_minus_c/2,1)
% delta_t = coeff(1)
% bias = coeff(2)
figure
% plot(vel_radi_meas,o_minus_c/2,'.b','MarkerSize',12)
errorbar(vel_radi_meas,o_minus_c/2,gnt(:,3),'.r','MarkerSize',12)
set(gca,'FontSize',40);
xlabel('Radial velocity [meters/second]','fontsize',40);
ylabel('O-C residual [meters]','fontsize',40);
mean(o_minus_c/2)
%% 测站偏心修正
% Load P.T.H. data
pth_file = dir('*.pth');
fid = fopen(pth_file.name,'r');
pthdata = fscanf(fid,'%f %f %f %f');
wavelength = 1.064; %um
latitude = 22.34639411111111; % °
height = 0.405713; % km
baroPressure = pthdata(2) * 1e2; % Pa
temperature = pthdata(3); % ℃
RH = pthdata(4); %
data_and_reflector=dir('*.la1');
if length(data_and_reflector) == 0
data_and_reflector=dir('*.la2');
end
temp = data_and_reflector.name;
YR = str2num(temp(1:4));
MONTH = str2num(temp(5:6));
DATE = str2num(temp(7:8));
% coordinate_station_itrs=[-2358691.210,5410611.484,2410087.607];
% Read SP3 data
sp3name=dir('*.sp3');
T=importdata(sp3name.name,' ',22,0);
for i=1:length(T.data(:,1))/3
sp3t(i,:)=T.data(3*i-2,:);
sp3xyz(i,:)=T.data(3*i-1,:);
sp3v_xyz(i,:)=T.data(3*i,:);
end
sp3yyyy=sp3t(:,1);sp3mt=sp3t(:,2);sp3d=sp3t(:,3);sp3h=sp3t(:,4);sp3m=sp3t(:,5);sp3s=sp3t(:,6); %年月日时分秒
sp3t_s=sp3h*3600+sp3m*60+sp3s; %转化为日积秒
sp3x=sp3xyz(:,1);sp3y=sp3xyz(:,2);sp3z=sp3xyz(:,3); %卫星（x,y,z）坐标
w7 = find(DATE == sp3d);
sp3x_w7=sp3x(w7);sp3y_w7=sp3y(w7);sp3z_w7=sp3z(w7); sp3t_s_w7=sp3t_s(w7);%测量卫星（x,y,z）坐标,时间（t）
sp3t_h_w7=sp3h(w7);sp3t_m_w7=sp3m(w7);sp3t_ss_w7=sp3s(w7);
% Coordinates of satellite in ITRS
xsate_itrs = [sp3x_w7,sp3y_w7,sp3z_w7];
sp3_IntpXYZ_itrs =[];
xsate_gcrs = [];
t_up_down = [];
pos_sat_bound = [];
o_minus_c = [];
% if coeff
tide_cor = [];
corr = [];
for i = 1:length(gnt(:,1))
% syms delta_x delta_y delta_z
hour(i) = floor(gnt(i,1)/3600);
minu(i) = floor((gnt(i,1) - hour(i) * 3600)/60);
sec(i) = gnt(i,1) - hour(i) * 3600 - minu(i) * 60;
% Calculation tide correction in meter
dxtide = solid_tide_dehan(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxotide = ocean_tide_hardisp(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxptide = solid_ptide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxatide = atm_tide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
dxoptide = ocean_ptide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
delta_x = -0.7396;
delta_y = -0.7396;
delta_z = -0.7396;
coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607] + [delta_x, delta_y, delta_z];
tide_cor = [tide_cor;dxtide + dxatide + dxptide + dxoptide];
coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
% 以TOF/2作为初始值
t_up = gnt(i,2)/2;
for j = 1:4
% Time bias
delta_t = 0 + coeff(1);
sp3_IntpX_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,1),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
sp3_IntpY_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,2),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
sp3_IntpZ_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,3),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
sp3_IntpXYZ_ITRS = [sp3_IntpX_ITRS;sp3_IntpY_ITRS;sp3_IntpZ_ITRS];
sp3_IntpXYZ_itrs = [sp3_IntpXYZ_itrs;sp3_IntpX_ITRS,sp3_IntpY_ITRS,sp3_IntpZ_ITRS];
IT2GC = ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i));
format long g
sp3_IntpXYZ_GCRS= IT2GC * sp3_IntpXYZ_ITRS;
coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
dxyz_itrs = sp3_IntpXYZ_ITRS - coordinate_station_itrs;
dxyz_gcrs = sp3_IntpXYZ_GCRS - coordinate_station_gcrs;
% norm(dxyz_itrs) - norm(dxyz_gcrs)
dxt = dxyz_itrs(1);
dyt = dxyz_itrs(2);
dzt = dxyz_itrs(3);
STAT_LONG=113.55421725;
STAT_LAT=22.34639411111111;
STAT_HEI=405.713;
STAT_LONGrad = deg2rad(STAT_LONG);
STAT_LATrad = deg2rad(STAT_LAT);
sp3R = norm(dxyz_gcrs);
gvs(1) = cos(STAT_LATrad)* cos(STAT_LONGrad); % Station X unit vector
gvs(2) = cos(STAT_LATrad)* sin(STAT_LONGrad); % Station Y unit vector
gvs(3) = sin(STAT_LATrad); % Station Z unit vector
dstn = norm(gvs); % Normalise the unit vectors
czd = (dxt*gvs(1)+dyt*gvs(2)+dzt*gvs(3))/(sp3R*dstn); % Zenith height component of SAT->STAT vector / vector range
altc = asin(czd)*360.0/(2.0*pi);
correction = atmospheric_refraction(altc, baroPressure, temperature);
elevationAngle = altc + correction;
atm_delay = MPAtmDelayModelCal(wavelength,latitude,height,baroPressure,temperature,RH,elevationAngle);
gravity_delay = gra_delay(YR,MONTH,DATE,hour(i),minu(i),sec(i),sp3_IntpXYZ_ITRS);
com_corr = 0.251;
t_up0 = (sp3R + atm_delay + gravity_delay - com_corr)/c;
t_up = t_up0;
if (abs(t_up - t_up0) > 1e-12)
t_up = t_up0;
else
t_up = t_up0;
break
end
end
t_down = gnt(i,2)/2;
for k = 1:4
WGS84_EARTH_ANGULAR_VELOCITY = 7.292115e-5; % rad/s
updt = WGS84_EARTH_ANGULAR_VELOCITY * t_up ;
downdt = WGS84_EARTH_ANGULAR_VELOCITY * t_down;
% syms t_down
IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_down+t_up));
coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs;
sp3R = norm(dxyz);
t_down0 = (sp3R + atm_delay + gravity_delay - com_corr)/c;
f = (sp3R + atm_delay + gravity_delay - com_corr)/c - t_down;
%solve
delta_t_down = abs(t_down0 - t_down);
% t_down = double(solve(f));
t_down = t_down0;
if delta_t_down<1e-12
break
end
end
t_up_down = [t_up_down;t_down,t_up];
resi = (gnt(i,2) - (t_down + t_up)) * c;
o_minus_c = [o_minus_c;resi];
pos_sat_bound = [pos_sat_bound;sp3_IntpXYZ_GCRS'];
corr = [corr;atm_delay + gravity_delay - com_corr];
end
%% station coordination calculation
A = [];
for i = 1:length(t_up_down(:,1))
coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607];
coordinate_station_itrs = (coordinate_station_itrs0 - tide_cor(i))';
IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_up_down(i,1)));
coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
sp3_IntpXYZ_GCRS = pos_sat_bound;
dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
sp3R = norm(dxyz);
A = [A;dxyz(1)/sp3R,dxyz(2)/sp3R,dxyz(3)/sp3R];
end
% b = regress(o_minus_c(1:i)/2,A)
%% station coordination calculation version--2
A = [];
B = [];
C = [];
D = [];
for i = 1:length(t_up_down(:,1))
coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607];
coordinate_station_itrs = (coordinate_station_itrs0 - tide_cor(i))';
dxyz = sp3_IntpXYZ_itrs(i,:) - coordinate_station_itrs';
sp3R = norm(dxyz);
A = [A;dxyz(1)/sp3R,dxyz(2)/sp3R,dxyz(3)/sp3R];
B = [B;dxyz(1)/sp3R];
C = [C;dxyz(2)/sp3R];
D = [D;dxyz(3)/sp3R];
end
% b = regress(o_minus_c(1:i)/2,A)
%% Gradient descent
delta_x = -1;
delta_y = -1;
delta_z = -1;
delta1 = 0.001;
E_x = [];
E_y = [];
E_z = [];
for m = 1
E = norm(A*[delta_x+ delta1*(m-1); delta_y; delta_z] - o_minus_c/2);
grad_E_x =(norm(A*[delta_x + delta1*m; delta_y; delta_z] - o_minus_c/2) - E)/delta1;
E_x = [E_x;m,grad_E_x]
grad_E_y = (norm(A*[delta_x; delta_y+delta1*m; delta_z] - o_minus_c/2) - E)/delta1;
E_y = [E_y;m,grad_E_y]
grad_E_z = (norm(A*[delta_x; delta_y; delta_z+delta1*m] - o_minus_c/2) - E)/delta1;
E_z = [E_z;m,grad_E_z]
end
% delta_x = delta_x + E_x(find(abs(E_x(:,2)) == min(abs(E_x(:,2)))),1) * delta1;
% delta_y = delta_y + E_y(find(abs(E_y(:,2)) == min(abs(E_y(:,2)))),1) * delta1;
% delta_z = delta_z + E_z(find(abs(E_z(:,2)) == min(abs(E_z(:,2)))),1) * delta1;
%
lambda = -0.0001;
F = [];
for n =1:100000
E = E - lambda * (grad_E_x+grad_E_y+grad_E_z);
F= [F;n, E];
if n > 2 & abs(F(end-2)) < abs(E)
break
end
end
F(find(abs(F(:,2)) == min(abs(F(:,2)))),1)
min(abs(F(:,2)))
%% station coordination calculation version--3
% syms delta_x delta_y delta_z
% fun = inv(cov(A))*[delta_x; delta_y; delta_z]-cov(o_minus_c);
% inv(cov(A))*cov(o_minus_c)
% [delta_x, delta_y, delta_z] = solve(fun==0);
% [double(delta_x),double(delta_y),double(delta_z)]
%% 站址修正
% c=299792458;% m/s
% spc = [];
%
%
% for i = 1:length(t_up_down(:,1))
% delta_RTT = 5;
% delta_y = 0;
% delta_z = 0;
% for delta_x = -20:1:100
%
% coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607] + [delta_x, delta_y, delta_z];
% coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)));
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_up0 = (sp3R + corr(i))/c;
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_up_down(i,1)+t_up_down(i,2)));
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_down0 = (sp3R + corr(i))/c;
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% delta_RTT0 = (t_up0 + t_down0 - gnt(i,2))*c;
% if abs(delta_RTT0) < abs(delta_RTT)
% delta_RTT = delta_RTT0;
% delta_x0 = delta_x;
% end
% end
%
%
% delta_x = delta_x0;
% delta_z = 0;
% delta_RTT = 6;
% for delta_y = -20:1:20
%
%
% coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607] + [delta_x, delta_y, delta_z];
% coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)));
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_up0 = (sp3R + corr(i))/c;
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_up_down(i,1)+t_up_down(i,2)));
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_down0 = (sp3R + corr(i))/c;
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% delta_RTT0 = (t_up0 + t_down0 - gnt(i,2))*c;
% if abs(delta_RTT0) < abs(delta_RTT)
% delta_RTT = delta_RTT0;
% delta_y0 = delta_y;
% end
% end
%
%
% delta_x = delta_x0;
% delta_y = delta_y0;
% delta_RTT = 5;
% for delta_z = -20:1:20
%
%
% coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607] + [delta_x, delta_y, delta_z];
% coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)));
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_up0 = (sp3R + corr(i))/c;
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_up_down(i,1)+t_up_down(i,2)));
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_down0 = (sp3R + corr(i))/c;
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% delta_RTT0 = (t_up0 + t_down0 - gnt(i,2))*c;
% if abs(delta_RTT0) < abs(delta_RTT)
% delta_RTT = delta_RTT0;
% delta_z0 = delta_z;
% end
% end
% spc = [spc; delta_x0, delta_y0, delta_z0];
% end
%
% fid=fopen([num2str(YR),num2str(MONTH),num2str(DATE),temp(end-2:end),'_','_residual.txt'],'w');%写入文件路径
%
% [r,l]=size(spc); % 得到矩阵的行数和列数
% for i=1:r
% for j=1:l
% fprintf(fid,'%2.3f\t',spc(i,j));
% end
% fprintf(fid,'\r\n');
% end
% fclose(fid);
%% 站址修正
% c=299792458;% m/s
% spc = [];
% for delta_x = -1:0.01:1
% % for delta_y = -1:0.01:1
% % for delta_z = -1:0.01:1
% delta_RTT = 5;
% for i = 1:length(t_up_down(:,1))
% % delta_RTT = 5;
% coordinate_station_itrs0=[-2358691.210,5410611.484,2410087.607] + [delta_x, delta_x, delta_x];%[delta_x, delta_y, delta_z];
% coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)));
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_up0 = (sp3R + corr(i))/c;
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_up_down(i,1)+t_up_down(i,2)));
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs';
% sp3R = norm(dxyz);
% t_down0 = (sp3R + corr(i))/c;
% sp3_IntpXYZ_GCRS = pos_sat_bound(i,:);
% delta_RTT0 = (t_up_down(i,1) + t_up_down(i,2) - gnt(i,2))*c;
% if delta_RTT0 < delta_RTT
% delta_RTT = delta_RTT0;
% end
% end
% if abs(delta_RTT) < 5e-1
% % spc = [spc;delta_RTT,delta_x, delta_y, delta_z];
% spc = [spc;delta_RTT,delta_x, delta_x, delta_x]
% end
% % end
% % end
% % delta_x
% end
% data_name = dir("*.a1*");
% if length(data_name) == 0
% data_name = dir("*.l1*")
% end
% endsWith(data_name.name,".a11")
% fid=fopen([num2str(YR),num2str(MONTH),num2str(DATE),temp(end-2:end),'_','_residual.txt'],'w');%写入文件路径
%
% [r,l]=size(spc); % 得到矩阵的行数和列数
% for i=1:r
% for j=1:l
% fprintf(fid,'%5.12f\t',spc(i,j));
% end
% fprintf(fid,'\r\n');
% end
% fclose(fid);
%% 其他站检核
% % Example 1: YARL
% % importdata('D:\npt\la1\lageos1_20191116.npt', ' ', 12,0)
% c=299792458;% m/s
% std1 = 0;
% data = [11 21308.400550200000 0.047387701325 std1 2 120.0 44 35.0 0.088 -0.083 -1.0 7.33 0
% 11 21399.000549900000 0.048710360126 std1 2 120.0 24 34.0 0.024 -0.490 -1.0 4.00 0
% 11 21496.400550999999 0.050220552225 std1 2 120.0 1 35.0 0.000 -3.000 -1.0 0.17 0
% 11 21602.400549800001 0.051954488686 std1 2 120.0 2 9.0 0.000 -2.000 -1.0 0.33 0];
% gnt=[data(:,2) data(:,3) data(:,7)*c*1e-12/2];
% pthdata = [20 21308.401 981.30 310.40 23. 0
% 20 21399.001 981.30 310.50 23. 0
% 20 21496.401 981.30 310.50 23. 0
% 20 21602.401 981.30 310.00 23. 0];
% wavelength = 0.532; %um
% latitude = -29.0464; % °
% height = 244e-3; % km
%
% pth_time = pthdata(:,2);
% baroPressure_list = pthdata(:,3) * 1e2; % Pa
% temperature_list = pthdata(:,4)-273.15; % ℃
% RH_list = pthdata(:,5); %
%
% % wavelength = 1.064; %um
% % latitude = 22.34639411111111; % °
% % height = 0.405713; % km
% data_and_reflector=dir('*.la1');
% if length(data_and_reflector) == 0
% data_and_reflector=dir('*.la2');
% end
% temp = data_and_reflector.name;
% YR = str2num(temp(1:4));
% MONTH = str2num(temp(5:6));
% DATE = str2num(temp(7:8));
%
% sp3name=dir('*.sp3');
% T=importdata(sp3name.name,' ',22,0);
%
% for i=1:length(T.data(:,1))/3
% sp3t(i,:)=T.data(3*i-2,:);
% sp3xyz(i,:)=T.data(3*i-1,:);
% sp3v_xyz(i,:)=T.data(3*i,:);
% end
% sp3yyyy=sp3t(:,1);sp3mt=sp3t(:,2);sp3d=sp3t(:,3);sp3h=sp3t(:,4);sp3m=sp3t(:,5);sp3s=sp3t(:,6); %年月日时分秒
% sp3t_s=sp3h*3600+sp3m*60+sp3s; %转化为日积秒
% sp3x=sp3xyz(:,1);sp3y=sp3xyz(:,2);sp3z=sp3xyz(:,3); %卫星（x,y,z）坐标
%
% w7 = find(DATE == sp3d);
% sp3x_w7=sp3x(w7);sp3y_w7=sp3y(w7);sp3z_w7=sp3z(w7); sp3t_s_w7=sp3t_s(w7);%测量卫星（x,y,z）坐标,时间（t）
% sp3t_h_w7=sp3h(w7);sp3t_m_w7=sp3m(w7);sp3t_ss_w7=sp3s(w7);
% % Coordinates of satellite in ITRS
% xsate_itrs = [sp3x_w7,sp3y_w7,sp3z_w7];
% xsate_gcrs = [];
% t_up_down = [];
% pos_sat_bound = [];
% o_minus_c = [];
% % coeff = [0 0 ];
% for i = 1:length(gnt(:,1))
% % syms delta_x delta_y delta_z
% hour(i) = floor(gnt(i,1)/3600);
% minu(i) = floor((gnt(i,1) - hour(i) * 3600)/60);
% sec(i) = gnt(i,1) - hour(i) * 3600 - minu(i) * 60;
% % Calculation tide correction in meter
% dxtide = (YR,MONTH,DATE,hour(i),minu(i),sec(i));
% dxotide = ocean_tide_hardisp(YR,MONTH,DATE,hour(i),minu(i),sec(i));
% dxptide = solid_ptide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
% dxatide = atm_tide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
% dxoptide = ocean_ptide(YR,MONTH,DATE,hour(i),minu(i),sec(i));
% % coordinate_station_itrs0=[-2830744.471,4676580.282,3275072.816];
% coordinate_station_itrs0=[-2389008,5043332,-3078526];
% coordinate_station_itrs = (coordinate_station_itrs0 - dxtide - dxatide - dxptide - dxoptide)';
%
% % 以TOF/2作为初始值
% t_up = gnt(i,2)/2;
% for j = 1:4
% % Time bias
% delta_t = 0;
% sp3_IntpX_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,1),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
% sp3_IntpY_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,2),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
% sp3_IntpZ_ITRS = lagint(sp3t_s_w7,xsate_itrs(:,3),gnt(i,1)+t_up+1e-7 + delta_t, 10)*1e3;
% sp3_IntpXYZ_ITRS = [sp3_IntpX_ITRS;sp3_IntpY_ITRS;sp3_IntpZ_ITRS];
% IT2GC = ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i));
%
% format long g
% sp3_IntpXYZ_GCRS= IT2GC * sp3_IntpXYZ_ITRS;
%
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
%
% dxyz_itrs = sp3_IntpXYZ_ITRS - coordinate_station_itrs;
%
% dxyz_gcrs = sp3_IntpXYZ_GCRS - coordinate_station_gcrs;
% % norm(dxyz_itrs) - norm(dxyz_gcrs)
% dxt = dxyz_itrs(1);
% dyt = dxyz_itrs(2);
% dzt = dxyz_itrs(3);
%
% STAT_LONG=113.55421725;
% STAT_LAT=22.34639411111111;
% STAT_HEI=405.713;
% STAT_LONGrad = deg2rad(STAT_LONG);
% STAT_LATrad = deg2rad(STAT_LAT);
% sp3R = norm(dxyz_gcrs);
% gvs(1) = cos(STAT_LATrad)* cos(STAT_LONGrad); % Station X unit vector
% gvs(2) = cos(STAT_LATrad)* sin(STAT_LONGrad); % Station Y unit vector
% gvs(3) = sin(STAT_LATrad); % Station Z unit vector
% dstn = norm(gvs); % Normalise the unit vectors
% czd = (dxt*gvs(1)+dyt*gvs(2)+dzt*gvs(3))/(sp3R*dstn); % Zenith height component of SAT->STAT vector / vector range
% altc = asin(czd)*360.0/(2.0*pi);
% baroPressure = interp1(pth_time,baroPressure_list,gnt(i,1));
% temperature = interp1(pth_time,temperature_list,gnt(i,1));
% RH = interp1(pth_time,RH_list,gnt(i,1));
% correction = atmospheric_refraction(altc, baroPressure, temperature);
% elevationAngle = altc + correction;
%
% atm_delay = MPAtmDelayModelCal(wavelength,latitude,height,baroPressure,temperature,RH,elevationAngle);
%
% gravity_delay = gra_delay(YR,MONTH,DATE,hour(i),minu(i),sec(i),sp3_IntpXYZ_ITRS);
%
% com_corr = 0.251;
%
% t_up0 = (sp3R + atm_delay + gravity_delay - com_corr)/c;
% t_up = t_up0;
% if (abs(t_up - t_up0) > 1e-9)
% t_up = t_up0;
% else
% t_up = t_up0;
% break
% end
% end
% t_down = gnt(i,2)/2;
%
% for k = 1:4
% WGS84_EARTH_ANGULAR_VELOCITY = 7.292115e-5; % rad/s
% updt = WGS84_EARTH_ANGULAR_VELOCITY * t_up ;
% downdt = WGS84_EARTH_ANGULAR_VELOCITY * t_down;
% % syms t_down
% IT2GC = (ITRS2GCRS(YR,MONTH,DATE,hour(i),minu(i),sec(i)+t_down+t_up));
% coordinate_station_gcrs = IT2GC * coordinate_station_itrs;
% dxyz = sp3_IntpXYZ_GCRS - coordinate_station_gcrs;
% sp3R = norm(dxyz);
% t_down0 = (sp3R + atm_delay + gravity_delay - com_corr)/c;
%
% f = (sp3R + atm_delay + gravity_delay - com_corr)/c - t_down;
% %solve
% delta_t_down = abs(t_down0 - t_down);
% % t_down = double(solve(f));
% t_down = t_down0;
% if delta_t_down<1e-9
% break
% end
% end
%
% t_up_down = [t_up_down;t_down,t_up];
% resi = (gnt(i,2) - (t_down + t_up)) * c;
% o_minus_c = [o_minus_c;resi];
% pos_sat_bound = [pos_sat_bound;sp3_IntpXYZ_GCRS'];
% end
%
% std(o_minus_c)