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UID:0-1648@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20260511T133000

DTEND;TZID=Asia/Jerusalem:20260511T143000

DTSTAMP:20260415T085731Z

URL:https://aerospace.technion.ac.il/events/geometric-analysis-and-optimiz
 ation-of-doppler-based-navigation-with-low-earth-orbit-satellites/

SUMMARY:Geometric Analysis and Optimization of Doppler-Based Navigation wit
 h Low Earth Orbit Satellites
DESCRIPTION:Lecturer:Carlos Caravaca Gallego\n Faculty:The Stephen B. Klein
  Faculty of Aerospace Engineering\n Institute:Technion – Israel Institut
 e of Technology\n Location:Online Seminar via Zoom\n Zoom: https://technio
 n.zoom.us/j/94050711666\n Abstract: \n\n\nDoppler-only navigation using lo
 w-Earth orbit satellite constellations is a promising complement to Global
  Navigation Satellite Systems (GNSS)\, yet the geometric principles govern
 ing satellite selection for Doppler positioning differ fundamentally from 
 those established for pseudorange-based navigation prevalent in GNSS. Volu
 me-based satellite selection\, effective for pseudorange-based geometric d
 ilution of precision (GDOP) minimization\, shows weak correlation with Dop
 pler GDOP\, but the mechanism responsible for this failure has not been id
 entified thus far. In this talk\, we will develop the theoretical framewor
 k needed to explain this phenomenon. Analytical parameterization of the ei
 ght-state Doppler Jacobian measurement matrix reveals that clock bias sens
 itivity creates a functional collinearity with the vertical-velocity colum
 n\, which has no pseudorange analogue\, and cannot be eliminated by any ge
 ometric arrangement. A Schur-complement framework quantifies the resulting
  covariance inflation\, and a systematic experimental campaign validates t
 he predictions\, confirming that altitude diversity is the primary decorre
 lation mechanism. The main contribution is the analysis and explanation of
  why volume-based satellite selection fails\, and why common heuristic GDO
 P proxies remain limited in effectiveness. Implications for optimal satell
 ite selection for Doppler-based navigation are outlined.\n\n&nbsp\;\n\nThi
 s work is towards a Ph.D. degree under the supervision of Prof. Pini Gurfi
 l\, Shirley and Burt Harris Professor of Aerospace Engineering.\nCoadvisor
 : Dr. Hector Rotstein\, Research Fellow\, Department of Computer Science\,
  The Technion\n\n&nbsp\;\n\n&nbsp\;\n\nPlease be advised that all seminars
  scheduled for the near future\, and until further notice\, will be held o
 nline only via Zoom. This transition allows us to maintain our academic ca
 lendar and ensure the safety and participation of our community regardless
  of location. We are committed to ensuring these virtual sessions are deli
 vered promptly and effectively. We appreciate your continued flexibility a
 nd look forward to seeing you in our virtual seminars.\n\n&nbsp\;\n\n\n\n 
 Details: \n 
CATEGORIES:Seminars
LOCATION:Online Seminar via Zoom

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