Fitting Satellite Laser Ranging Data Using Spline Techniques

Yousry Shafik Hanna1, Makram Ibrahim1 and Samya Felobos Ragheb2

(1)National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt,

Yousryhanna@hotmail.com, Makikh@yahoo.com

(2)Faculty of Science, Helwan University

Abstract:
A new technique for constructing the proper spline is given. The matrix of covariation of normal places taken at two neighbouring Chebyshev polynomials are found. The method is applied for satellite observations taken from Satellite Laser ranging Station at Helwan. The data used are laser ranging data of artificial earths satellite Topex.

Keywords:  Proper Spline, Satellite Observations, Fitting Principles