You need to provide more information, what exactly is the data, what are its error charateristics, what was the platforms nominal motion, ...

... and of course what you want to do with the result.

CB

I have the 3 dimensional position of a flight in x, y, and z co-ordinates (ECEF they call it) in cartesian co-ordinate system. i.e. if the flights position 'P' is designated by these three co-ordinates, P(x,y,z), I have got this position at different instants of time at an interval of 100ms.

Sample data is as follows:

-1138227.9178 -5370424.0963 3257208.3655

-1138240.1536 -5370414.0210 3257220.6192

-1138252.3895 -5370403.9456 3257232.8728

-1138264.6253 -5370393.8702 3257245.1265

-1138276.8611 -5370383.7947 3257257.3801

-1138289.0968 -5370373.7191 3257269.6337

-1138301.3325 -5370363.6435 3257281.8873

-1138313.5682 -5370353.5679 3257294.1409

-1138325.8038 -5370343.4921 3257306.3945

-1138338.0395 -5370333.4164 3257318.6480

-1138350.2750 -5370323.3405 3257330.9015

-1138362.5106 -5370313.2646 3257343.1551

-1138374.7461 -5370303.1887 3257355.4086

-1138386.9816 -5370293.1126 3257367.6620

-1138399.2171 -5370283.0366 3257379.9155

-1138411.4525 -5370272.9604 3257392.1690

-1138423.6879 -5370262.8842 3257404.4224

-1138435.9233 -5370252.8080 3257416.6758

-1138448.1586 -5370242.7317 3257428.9292

-1138460.3939 -5370232.6553 3257441.1826

-1138472.6292 -5370222.5789 3257453.4359

-1138484.8644 -5370212.5024 3257465.6893

-1138497.0996 -5370202.4259 3257477.9426

-1138509.3348 -5370192.3493 3257490.1959

-1138521.5700 -5370182.2726 3257502.4492

-1138533.8051 -5370172.1959 3257514.7025

-1138546.0402 -5370162.1191 3257526.9558

-1138558.2752 -5370152.0423 3257539.2090

-1138570.5102 -5370141.9654 3257551.4623

-1138582.7452 -5370131.8885 3257563.7155

...

and so on.

I need to find a mathematical model of the flight's position which fits this data.

So that I can best replicate the position at any time.