Method and apparatus for using satellite status information in satellite positioning systems

A computer readable medium containing executable computer program instructions, which when executed by a data processing system, cause the data processing system to perform a method for processing satellite positioning system (SPS) signals, the method comprising:

• attempting to acquire SPS signals from in view SPS satellites regardless of whether the in view SPS satellites are unhealthy;
• receiving health data specifying which of the in view SPS satellites are unhealthy;
• testing measurements obtained from acquiring the SPS signals, for all of the in view SPS satellites, for a cross-correlation between two different SPS satellites, wherein the testing is performed regardless of whether an in view SPS satellite is unhealthy.

An apparatus comprising:

• a mobile satellite position system (SPS) receiver to receive SPS signals;
• and
• a receiver coupled with the mobile SPS receiver, wherein the mobile SPS receiver receives the SPS signals from a transmitter and analyzes in view SPS satellites for a cross-correlation condition wherein a healthy SPS satellite's signal is influenced by an unhealthy SPS satellite's signal, the unhealthy SPS satellite's signal and the cross-correlated SPS satellite's signal being removed or corrected before a location is computed from the in view SPS satellites by the mobile SPS receiver.

An apparatus to receive satellite position system (SPS) signals from a server comprising:

• a mobile SPS receiver to receive the SPS signals;
• and
• a receiver coupled with the mobile SPS receiver, wherein the server analyzes in view SPS satellites for a cross-correlation condition wherein a healthy SPS satellite's signal is influenced by an unhealthy SPS satellite's signal, the unhealthy SPS satellite's signal and the cross-correlated SPS satellite's signal being removed or corrected before a location is computed from the in view SPS satellites by the server.

A method for processing satellite positioning system (SPS) signals, the method comprising:

• attempting to acquire SPS signals from all SPS satellites in view of a mobile SPS receiver regardless of whether the SPS satellites are unhealthy;
• receiving health data specifying which SPS satellites in view of the mobile SPS receiver are unhealthy;
• testing, for all SPS satellites in view, measurements obtained from acquiring SPS signals for a cross-correlation between two different SPS satellites, wherein the testing is performed regardless of whether an SPS satellite in view is unhealthy.