RT Journal Article
T1 New method to calculate the angular weighting function for a scattering instrument: Application to a dust sensor on Mars
A1 Santalices, David
A1 Castro González, Antonio Jesús de
A1 Briz Pacheco, Susana
AB Suspended dust above the Martian surface is an important element in Martian climatology. In the frame of the Exomars'22 mission, we developed a dust sensor instrument, designed to provide size parameters of dust particles suspended in Mars surface from the light scattered by the particles. Thus, to interpret the data of the dust sensor, we need a method to calculate the theoretical optical power dispersed by the particles and, therefore, the theoretical signal obtained by the instrument. This signal depends on the suspended particles and on the instrument configuration. In this paper, we present a new method to calculate the angular weighting function (Wf) for scattering sensors. (Wf) encompasses the scattering angles measured by the sensor and depends only on the instrument and not on the suspended particles. To calculate this (Wf), we use fundamental radiometry principles and an appropriate coordinate system, where one coordinate is the scattering angle. The method is applied to the dust sensor instrument and compared with other methods. The comparison highlights the advantages of the proposed method since it avoids using an ideal sampling volume, preserves the radiometric meaning, and avoids instrument calibration. The effectiveness of the method makes it a valuable tool for the design of scattering instruments and also for the interpretation of their data.
PB MDPI
SN 1424-3210
YR 2022
FD 2022-12-01
LK https://hdl.handle.net/10016/37181
UL https://hdl.handle.net/10016/37181
LA eng
NO This article belongs to the Section Optical Sensors.
NO This work has been supported by FEDER/Ministerio de Ciencia, Innovación y Universidades Agencia Estatal de Investigación, Spain, under project RTI2018-099825-B-C33. This work has also been supported by the Madrid Government (Comunidad de Madrid-Spain) under the Multi-annual Agreement with UC3M in the line of Excellence of University Professors in the context of the V PRICIT (Regional Programme of Research and Technological Innovation) (EPUC3M14).
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RD 18 may. 2024