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UID:0-187@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20230130T133000

DTEND;TZID=Asia/Jerusalem:20230130T143000

DTSTAMP:20230103T081518Z

URL:https://aerospace.technion.ac.il/events/resilient-navigation-augmentin
 g-inertial-navigation-systems-with-satellite-signals-of-opportunity/

SUMMARY:Resilient Navigation: Augmenting Inertial Navigation Systems with S
 atellite Signals of Opportunity
DESCRIPTION:Lecturer:Ariel Baron \n Faculty:Department of Aerospace Enginee
 ring\n Institute:Technion – Israel Institute of Technology\n Location:Cl
 assroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: https://tech
 nion.zoom.us/j/98367931661\n Abstract: In a GNSS-denied environment\, it i
 s important to have alternative navigation systems that can provide accura
 te and reliable positioning\, navigation\, and timing (PNT) information. T
 his is particularly critical in scenarios where PNT is essential for safet
 y or mission-critical applications\, such as in aviation\, maritime naviga
 tion\, and military operations.\nThis research aims to develop a 4D (posit
 ion/navigation/time) system by passively receiving downlink signals from l
 arge constellations of low Earth orbit satellites\, such as OneWeb\, Starl
 ink\, and GlobalStar. These constellations will not support pseudorange-ba
 sed navigation because they will not carry atomic clocks and will not broa
 dcast downlink signals that support pseudorange measurements. Instead\, th
 e system will use carrier Doppler shift as the only navigation observable\
 , using eight or more measurements to determine 3D position\, receiver clo
 ck offset\, velocity\, and receiver clock offset rate.\nThe research focus
 ed on a Doppler shift measurement model. Convergence techniques for non-li
 near optimization were explored and the expected accuracy was evaluated th
 rough the development of Geometric Dilution of Precision (GDOP) formulatio
 ns. A simulator was developed to assess navigation performance in static e
 nvironments and predict GDOP at any given time and receiver location. Addi
 tionally\, the research included a hardware implementation on a smartphone
  device as well as investigation into the effect of atmospheric and orbita
 l errors on the navigation system.\n Details: \n 
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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