Apparatus and associated methods relate to improving measurement of metrics determined by laser air-data systems subject to unwanted background light. Such measurements are improved by estimating and excising the unwanted background light from the total light received by an optical receiver (14) which receives a Doppler-shifted reflected portion of a projected beam of light backscattered by aerosols and air molecules of an atmosphere. The background light is estimated using a background-light rejection filter (16) that receives the light received by the optical receiver (14) after it has been filtered by a vapor cell filter (22) and separates the light received by the optical receiver (14) into a beam sampling portion and a complementary non-beam portion. The non-beam sampling portion is used to estimate the background light portion within the beam sampling portion, which also contains the Doppler-shifted reflected portion of the projected beam used for calculating the metrics of air data.
INTEGRATED VAPOR FILTER WITH BACKGROUND REJECTION FOR MEASURING AIR DATA OF AN ATMOSPHERE
INTEGRIERTER DAMPFFILTER MIT HINTERGRUNDABWEISUNG ZUR MESSUNG VON LUFTDATEN EINER ATMOSPHÄRE
FILTRE À VAPEUR INTÉGRÉ AVEC REJET DE BRUIT DE FOND POUR MESURER LES DONNÉES DE L'AIR D'UNE ATMOSPHÈRE
2025-01-29
Patent
Electronic Resource
English
IPC: | G01P MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK , Messen der Linear- oder Winkelgeschwindigkeit, der Beschleunigung, der Verzögerung oder des Stoßes / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / G01S RADIO DIRECTION-FINDING , Funkpeilung |
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