US 11,656,368 B2
Systems and methods for GPS/GNSS based real time global asset tracking
Barbara Ann Block, Pacific Grove, CA (US); Sherman C. Lo, Stanford, CA (US); David S. De Lorenzo, Stanford, CA (US); Yu-Hsuan Chen, Stanford, CA (US); and Per K. Enge, Stanford, CA (US)
Assigned to The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US)
Filed by The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US)
Filed on Jun. 7, 2021, as Appl. No. 17/340,580.
Claims priority of provisional application 63/035,555, filed on Jun. 5, 2020.
Prior Publication US 2021/0382182 A1, Dec. 9, 2021
Int. Cl. G01S 19/42 (2010.01); G01S 19/34 (2010.01); G01S 19/45 (2010.01); H01Q 1/24 (2006.01); H04L 67/52 (2022.01)
CPC G01S 19/42 (2013.01) [G01S 19/34 (2013.01); G01S 19/45 (2013.01); H01Q 1/24 (2013.01); H04L 67/52 (2022.05)] 7 Claims
OG exemplary drawing
 
1. A system for real time global asset tracking, the system comprising:
a tag having a microcontroller, a memory containing an application, and a plurality of antenna, wherein the application directs the microcontroller to selected one antenna from the plurality of antenna for use in satellite communication;
a server-side processor;
a server-side memory comprising a tracking application, where the tracking application directs the processor to:
determine a time search window based on a message received from the tag;
perform an initial position search;
perform calculations for position and time, utilizing the time search window, the initial position search and satellite ephemeris information; and
display a position information of the tag.