1. Test Vectors First, an overview of the data coming from the satellites: GPS Message Consists of a NAV message modulated with a much higher-frequency code. C/A Code Stands for Coarse/Aquisition Code 1023-bit code at 1.023 MHz NAV Message Contains Navigation, Ephemeris, and Almanac information 1500 bit message at 50 Hz 300 bits per each of 5 subframes

2. C/A Code: Psuedorandom “Gold Code” Peter H. Dana, 1992http://www.colorado.edu/geography/gcraft/notes/gps/gps.ht mlhttp://www.colorado.edu/geography/gcraft/notes/gps/gps.ht ml For simplification, this algorithm is performed in MATLAB/Octave beforehand

3. Peter H. Dana, 1992http://www.colorado.edu/geography/gcraft/notes/gps/gps.ht mlhttp://www.colorado.edu/geography/gcraft/notes/gps/gps.ht ml

4. Global Positioning System Standard Positioning Service Signal Specification, 1995 http://www.navcen.uscg.gov/pubs/gps/sigspec/default.htm

5. Test Vectors Testing will be performed using the following: C/A code generated using MATLAB/Octave NAV Message subframe manually assembled based on the GPS specification Composite data obtained by performing the binary modulation in MATLAB/Octave and writing a standard binary file to the file system. C/A Code n NAV Msg n X Octave Script cacode(n) Test Vector n Correlator Code Test Vector 1 Test Vector 2 Test Vector 3 NAV Msg n Random Phases