الفهرس 
SATELLITE RANGING OVERVIEWOnly 14 pages are availabe for public view
 |  | from | 262 |  |  |
| | | from | 262 | | |
Abstract
Satellite ranging, which is the task of determining the slant
range between the satellite and its ground control station, is a vital
process, which is used in satellite tracking and determination of its
orbit.
This study includes a number of topics: chapter one reviews
the range determination methods in general and particularly for
satellites, and outline of the ranging signal design used. It was found
that the ranging method that uses pseudo random sequences as the
ranging signal is the most suitable and accurate method. Chapter two
is concerned with the choice of certain ranging method and designing
of the used ranging code to satisfy the ranging determination
requirements such as the maximum satellite range, range resolution,
easy and fast acquisition of the ranging code, and difficulty of
interceptability. This chapter also overviews the different types of
pseudo random sequences used in ranging, concerning their different
properties and generation methods.
Chapter three reviews and studies the methods of acquisition
of the pseudo random sequence (PRS), which is the phase that
precedes the PRS sequence tracking phase during the communication
session with satellite. The acquisition phase includes a study of the
probability of failure in acquiring the PRS, and study of the
probability of acquisition by two methods. The acquisition process
was also programmed on FPGA.
Chapter four is concerned with the PRS tracking by using
digital delay-locked loop (DLL). This chapter also includes, a study
of the DLL with its components and the design equations for each