US 12,422,567 B2
Methods and apparatus to reduce communications for position, navigation and timing determinations
Rongsheng Li, Hacienda Heights, CA (US); Kenneth Cecil Clark, Jupiter, FL (US); Andrey Tolstov, Höhenkirchen-Siegertsbrunn (DE); Tung-Ching Tsao, Torrance, CA (US); Cody L. Gruebele, Corona, CA (US); and Chang Jin Yoo, Anaheim, CA (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Arlington, VA (US)
Filed on Mar. 13, 2023, as Appl. No. 18/182,834.
Prior Publication US 2024/0310531 A1, Sep. 19, 2024
Int. Cl. G01S 19/45 (2010.01); G01S 19/24 (2010.01)
CPC G01S 19/45 (2013.01) [G01S 19/243 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus to enable positioning, navigation and timing (PNT) determination for a mobile station with signals of opportunity (SOOP), the apparatus comprising:
machine readable instructions; and programmable circuitry to execute the machine readable instructions to:
identify features of the SOOP measured at a reference station,
generate a model based on the identified features of the SOOP in conjunction with a position and a timing of the reference station,
provide at least one of the model or parameters associated with the model to the mobile station for the PNT determination:
compare a degree of change of at least one of the identified features of the SOOP to a threshold degree of change to determine that the degree of change of the least one of the identified features has met or exceeded the threshold degree of change; and in response to determining that the degree of change of the at least one of the identified features meets or exceeds the threshold degree of change,
update the model,
repeat updating the model until the degree of change of the least one of the identified features no longer exceeds the threshold degree of change; and
cause a transmitter to transmit at least one of the updated model or an updated parameter associated with the updated model to the mobile station, wherein the mobile station is to switch to the SOOP from the updated model when at least one of global positioning system (GPS) signals or global navigation satellite system (GNSS) signals is unavailable to the mobile station.