Ultra wide-lane (uwl) ambiguity to identify precise positioning engine (ppe) correction exceptions

A global navigation satellite system (GNSS) device comprising:

• a multi-band GNSS receiver;
• one or more memories;
• and
• one or more processors communicatively coupled with the multi-band GNSS receiver and the one or more memories, wherein the one or more processors are configured to:
• receive GNSS correction data from a correction data source;
• obtain, using the multi-band GNSS receiver:
• a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and
• a second carrier-phase measurement of a second GNSS signal having a second carrier frequency;
• apply the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both;
• subsequent to applying the GNSS correction data, perform a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;
• and
• determine whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value.

An apparatus for identifying an error in global navigation satellite system (GNSS) correction data for precise positioning of a GNSS device, the apparatus comprising:

• means for receiving the GNSS correction data from a correction data source;
• means for obtaining:
• a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and
• a second carrier-phase measurement of a second GNSS signal having a second carrier frequency;
• means for applying the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both;
• subsequent to applying the GNSS correction data, performing a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;
• and
• means for determining whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value.

A non-transitory computer-readable medium storing instructions for identifying an error in global navigation satellite system (GNSS) correction data for precise positioning of a GNSS device, the instructions comprising code for:

• receiving, at the GNSS device, the GNSS correction data from a correction data source;
• obtaining, using a multi-band GNSS receiver of the GNSS device:
• a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and
• a second carrier-phase measurement of a second GNSS signal having a second carrier frequency;
• applying the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both;
• subsequent to applying the GNSS correction data, performing a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;
• and
• determining whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value.