Method and system for all-in-view coherent gps signal prn codes acquisition and navigation solution determination

A method for rapidly acquiring and using a plurality of satellite ranging signals to determine position information, the method comprising:

• using a first user receiver to receive satellite ranging signals from satellites within view of said first user receiver, to determine a probable location of the first user receiver;
• transmitting from the first user receiver the probable location of the first user receiver and additional information to a second user receiver to assist said second user receiver in determining its position;
• using the additional information and the first user receiver probable location to limit an Earth-reference search space region associated with the second user receiver to predetermined geographic dimensions;
• using the second user receiver to search a grid defined by said predetermined geographic dimensions to simultaneously obtain satellite ranging signals from a plurality of said satellites within view of said second user receiver;
• and
• causing the second user receiver to use the obtained satellite ranging signals and the probable location of the first user receiver to rapidly obtain a probable geographic location of the second user receiver by coherently combining the power in the received satellite ranging codes.

A method for enabling a user receiver to rapidly acquire and use a plurality of satellite ranging signals having satellite codes to rapidly determine a position of the user receiver, the method comprising:

• receiving a set of initialization data and remote source location data, from a remote source, to limit a first Earth-reference search space region, in which the user receiver is located, to predetermined geographic dimensions;
• receiving a time synch function, from the remote source, to synchronize a user receiver clock of the user receiver and calibrate a user receiver oscillator such that the user receiver clock and the user receiver oscillator maintain time;
• acquiring simultaneously with said initialization data at least one of the satellite codes from each one of a plurality of satellites in view of the user receiver;
• coherently combining said acquired satellite codes from a plurality of said satellites in view of said user receiver to detect therefrom a first probable location of the user receiver at a first epoch time;
• determining a time lapse since the first probable location was detected;
• predicting a second set of initialization data, using the time lapse and received set of initialization data, to limit a second Earth-reference search space region to a second set of predetermined geographic dimensions;
• acquiring simultaneously at least one of the satellite codes from each of the plurality of satellites in view of the user receiver;
• and
• coherently combining said acquired satellite codes to detect therefrom a second probable location of the user receiver within the second Earth-reference search space region at a second epoch time.

A method for rapidly acquiring and using a plurality of satellite ranging signals having satellite codes to rapidly determine a real time position of a user receiver, the method comprising:

• using a first user receiver to receive said satellite codes and to detect therefrom a first-user-receiver probable location;
• using the first user receiver to transmit to a second user receiver information and the first user receiver probable location, to limit an Earth-reference search space grid in which the second user receiver is located to predetermined geographic dimensions;
• using the first user receiver to transmit a time synch function to the second user receiver to enable the second user receiver to synchronize a user receiver clock, satellite ranging data as received at the first user receiver at an epoch time, including code and carrier phase measurements of the first user receiver at an epoch time;
• using the second user receiver to directly predict code phase data and carrier phase data relative to the second user receiver at the epoch time and grid point, and to acquire simultaneously at least one of the satellite codes from a plurality of satellites in view of the first user receiver;
• and
• using the second user receiver to search over the search space grid points and coherently combine received satellite codes from said plurality of satellites and to detect therefrom a second-user-receiver probable location.

A method for enabling a user receiver to rapidly acquire and use a plurality of satellite ranging signals having satellite codes to rapidly determine a position of the user receiver, the method comprising:

• using a user receiver to receive satellite ranging signals from satellites within view of said user receiver, to determine a first probable location of the user receiver at a first epoch time;
• determining a time lapse since the first probable location was detected;
• predicting a set of initialization data, using the time lapse, received satellite Navigation message data and first probable location, to limit an Earth-reference search space region to a set of predetermined geographic dimensions;
• acquiring simultaneously at least one of the satellite codes from each of the plurality of satellites in view of the user receiver, at a plurality of grid points within the search space region;
• and
• coherently combining said acquired satellite codes at each of said plurality of grid points within said search space region to detect therefrom a second probable location of the user receiver within the Earth-reference search space region at a second epoch time.