A simulation process of tunable open path diode laser spectrometer to detect a carbon monoxide gas in NIR region

By modifying the wavelength of the open path tunable diode laser spectrometer (TDLS) in the near infrared region, theoretical research was implemented to improve the detection limit of carbon monoxide gas. To adjust the correct wavelength in the NIR area, MatLab code was created. Following that, frequency domain measurements were performed in order to extract the second harmonic as an indicator of gas presence. According to the results, the correct wave length in the NIR area is (1584.877 nm), and the lowest limit of CO gas concentration is (0.012 ppb).

Site Identification and Sample Analysis with ExoMars Mission mock-up instruments on a Martian analogue site on Mt. Etna

<p>The landing site of the ExoMars 2022 mission is Oxia Planum, a basin rich in hydrated minerals located between Mawrth and Ares Vallis. Its clay-rich deposits of Noachian age have been covered by volcanic outflows, that have only recently started to erode away. This makes it more likely that biochemical markers have been preserved as they were shielded from long-term cosmic ray exposure.</p> <p>Martian analogue sites are valuable testing-grounds for both instrumentation and scientific analysis. During the EuroMoonMars Etna campaign, mockups of ExoMars instruments were used to perform scientific analysis on a Martian Analogue site on Mt. Etna.</p> <p>Satellite images are used to identify sites of interest on the slopes of Mt. Etna, mimicking the use of images and data from the MRO CTX, HiRISE, MEX HRSC and the CRISM spectrometer, to characterise the surface of Oxia Planum during the ExoMars Mission.</p> <p>On the ground, Panoramic imaging and wide-angle photographs are used to select sites for close-up study with a mock-up of the Pancam instrument. Pancam is a set of two wide angle cameras for multi-spectral stereoscopic panoramic imaging, and a high resolution camera for colour imaging.</p> <p>On selected sites, geological and biogeochemical markers are identified and characterized using Raman spectroscopy and optical microscopy, mimicking ExoMars’ onboard instruments RLS (Raman Laser spectrometer), and CLUPI (Close-up imager).</p>

The EUREC⁴A turbulence dataset derived from the SAFIRE ATR 42 aircraft

During the EUREC4A field experiment that took place over the tropical Atlantic Ocean east of Barbados, the French ATR 42 environment research aircraft of SAFIRE aimed to characterize the shallow cloud properties near cloud base and the turbulent structure of the subcloud layer. For this purpose, the aircraft payload included radar and lidar remote sensing, microphysical probes, a laser spectrometer, and meteorological sensors. In particular, the aircraft was equipped with a five-hole radome nose as well as several temperature and moisture sensors allowing for measurements of wind, temperature and humidity at 25 Hz. This paper presents the high-frequency measurements made with these sensors and their translation in terms of turbulent fluctuations, turbulent moments and characteristic length scales of turbulence. A particular focus is on the calibration and the quality control of the air moisture measurements, which remain a challenge at fine scales. Level-2 and Level-3 data are distributed as an ensemble of NetCDF files available to the public at AERIS (https://doi.org/10.25326/128, Lothon and Brilouet, 2020).