Single Photon Light Detection and Ranging for Spaceborne Applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F16%3A00243379" target="_blank" >RIV/68407700:21340/16:00243379 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Single Photon Light Detection and Ranging for Spaceborne Applications

Popis výsledku v původním jazyce

This dissertation endeavours on the state-of-the-art improvements in the elds of space-borne altimetry and time-transfer using the single photon counting approach. The particular concern is for the theoretical analysis and modeling allowing a consequent derivation of the optimal signal processing algorithms followed by an experimental validation. The review of single photon space-borne applications is provided along with their drawbacks and limits. The single photon altimeter simulator is developed, incorporating all crucial physical, topographical and environmental mechanisms. The simulator retrieve model (signal processing) is based on the Poisson statistics, recognizing the signal echoes with a certain level of discrimination (sigma criterion). A performance metric is derived, evaluating a proposed altimeter conguration for specic tasks given by mission requirements. A single photon altimeter breadboard was designed and developed to experimentally evaluate the signal processing algorithms. A novel and original algorithm was derived, based on the Poisson statistic lter and a modied Kalman lter, providing all common altimetry products (altitude, slope, background photon ux and albedo). The Kalman lter is extended for background noise ltering, varying slope adaptation and non-causal extension for an abrupt slope change. Moreover, the algorithm partially removes the major drawback of a single photon altitude reading, namely that the measurement statistics must be gathered. The developed algorithm deduces the actual altitude on the basis of a single photon detection; thus, it is optimal in the sense that each detected signal photon carrying altitude information is tracked and no altitude information is lost.

Název v anglickém jazyce

Single Photon Light Detection and Ranging for Spaceborne Applications

Popis výsledku anglicky

This dissertation endeavours on the state-of-the-art improvements in the elds of space-borne altimetry and time-transfer using the single photon counting approach. The particular concern is for the theoretical analysis and modeling allowing a consequent derivation of the optimal signal processing algorithms followed by an experimental validation. The review of single photon space-borne applications is provided along with their drawbacks and limits. The single photon altimeter simulator is developed, incorporating all crucial physical, topographical and environmental mechanisms. The simulator retrieve model (signal processing) is based on the Poisson statistics, recognizing the signal echoes with a certain level of discrimination (sigma criterion). A performance metric is derived, evaluating a proposed altimeter conguration for specic tasks given by mission requirements. A single photon altimeter breadboard was designed and developed to experimentally evaluate the signal processing algorithms. A novel and original algorithm was derived, based on the Poisson statistic lter and a modied Kalman lter, providing all common altimetry products (altitude, slope, background photon ux and albedo). The Kalman lter is extended for background noise ltering, varying slope adaptation and non-causal extension for an abrupt slope change. Moreover, the algorithm partially removes the major drawback of a single photon altitude reading, namely that the measurement statistics must be gathered. The developed algorithm deduces the actual altitude on the basis of a single photon detection; thus, it is optimal in the sense that each detected signal photon carrying altitude information is tracked and no altitude information is lost.

Druh

O - Ostatní výsledky

CEP obor

JV - Kosmické technologie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů