Results 61 to 70 of about 2,581 (194)

Parameterization retrieval of trace gas volume mixing ratios from airborne MAX-DOAS [PDF]

Atmospheric Measurement Techniques, 2016
Abstract. We present a parameterization retrieval of volume mixing ratios (VMR) from differential slant column density (dSCD) measurements by airborne multi-axis differential optical absorption spectroscopy (AMAX-DOAS). The method makes use of the fact that horizontally recorded limb spectra (elevation angle 0°) are strongly sensitive to the ...
B. Dix, T. K. Koenig, T. K. Koenig, R. Volkamer, R. Volkamer   +4 more
openaire   +4 more sources

Enhancing MAX-DOAS atmospheric remote sensing by multispectral polarimetry

, 2021
Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) is a well-established remote sensing technique for the detection of atmospheric aerosol and trace gases. Ultra-violet and visible radiation spectra of skylight are analysed to obtain information on different atmospheric parameters.
openaire   +2 more sources

Validation of tropospheric NO₂ column measurements of GOME-2A and OMI using MAX-DOAS and direct sun network observations [PDF]

Atmospheric Measurement Techniques, 2020
Multi-axis differential optical absorption spectroscopy (MAX-DOAS) and direct sun NO2 vertical column network data are used to investigate the accuracy of tropospheric NO2 column measurements of the GOME-2 instrument on the MetOp-A satellite platform and
G. Pinardi, M. Van Roozendael, F. Hendrick, N. Theys, N. Abuhassan, N. Abuhassan, A. Bais, F. Boersma, F. Boersma, A. Cede, A. Cede, J. Chong, S. Donner, T. Drosoglou, A. Dzhola, H. Eskes, U. Frieß, J. Granville, J. R. Herman, J. R. Herman, R. Holla, J. Hovila, H. Irie, Y. Kanaya, D. Karagkiozidis, N. Kouremeti, N. Kouremeti, J.-C. Lambert, J. Ma, E. Peters, A. Piters, O. Postylyakov, A. Richter, J. Remmers, H. Takashima, H. Takashima, M. Tiefengraber, M. Tiefengraber, P. Valks, T. Vlemmix, T. Wagner, F. Wittrock   +41 more
doaj   +1 more source

BOREAS – a new MAX-DOAS profile retrieval algorithm for aerosols and trace gases [PDF]

Atmospheric Measurement Techniques, 2018
Abstract. We present a new MAX-DOAS profiling algorithm for aerosols and trace gases, BOREAS, which utilizes an iterative solution method including Tikhonov regularization and the optimal estimation technique. The aerosol profile retrieval is based on a novel approach in which the absorption depth of O4 is directly used in order to retrieve extinction ...
T. Bösch, V. Rozanov, A. Richter, E. Peters, E. Peters, A. Rozanov, F. Wittrock, A. Merlaud, J. Lampel, J. Lampel, S. Schmitt, M. de Haij, S. Berkhout, B. Henzing, A. Apituley, M. den Hoed, J. Vonk, M. Tiefengraber, M. Tiefengraber, M. Müller, M. Müller, J. P. Burrows   +21 more
openaire   +4 more sources

Five Years of Spatially Resolved Ground-Based MAX-DOAS Measurements of Nitrogen Dioxide in the Urban Area of Athens: Synergies with In Situ Measurements and Model Simulations

Atmosphere, 2021
Long-term nitrogen dioxide (NO2) slant column density measurements using the MAX-DOAS (multi-axis differential optical absorption spectroscopy) technique were analyzed in order to demonstrate the temporal and horizontal variability of the trace gas in ...
Myrto Gratsea, Eleni Athanasopoulou, Anastasia Kakouri, Andreas Richter, Andre Seyler, Evangelos Gerasopoulos   +5 more
doaj   +1 more source

Comparison of formaldehyde tropospheric columns in Australia and New Zealand using MAX-DOAS, FTIR and TROPOMI [PDF]

Atmospheric Measurement Techniques, 2020
South-eastern Australia has been identified by modelling studies as a hotspot of biogenic volatile organic compound (VOC) emissions; however, long-term observational VOC studies are lacking in this region.
R. G. Ryan, R. G. Ryan, J. D. Silver, R. Querel, D. Smale, S. Rhodes, M. Tully, N. Jones, R. Schofield, R. Schofield, R. Schofield   +10 more
doaj   +1 more source

Iodine oxide in the global marine boundary layer [PDF]

, 2015
Prados-Roman, C. ... et. al.-- 11 pages, 7 figures, 2 tables, The Supplement related to this article is available online at https://doi.org/10.5194/acp-15-583-2015-supplementEmitted mainly by the oceans, iodine is a halogen compound important for ...
Cuevas, Carlos A., Dachs, Jordi, Fernández, Rafael P., Galí, Martí, Hay, T.D., Mahajan, Anoop S., Prados-Roman, C., Royer, S.-J., Saiz-Lopez, A., Simó, Rafel   +9 more
core   +2 more sources

Concurrent Sensing and Communications Based on Intelligent Metasurfaces

Advanced Electronic Materials, Volume 12, Issue 2, 21 January 2026.
An IM‐assisted concurrent ISAC scheme to exploit the otherwise wasted energy inherent in high‐order 16‐APSK DAM, to realize wireless gesture recognition thereby enabling efficient resource sharing for C‐ISAC. This architecture offers promising opportunities for next‐generation mobile internet, embodied intelligence, smart homes, smart factories, and ...
Hanting Zhao, Menglin Wei, Mingyi Li, Jiawen Xu, Jing Jin, Qixing Wang, Chunju Shao, Haiyu Ding, Lianlin Li   +8 more
wiley   +1 more source

Ability of the MAX-DOAS method to derive profile information for NO₂: can the boundary layer and free troposphere be separated? [PDF]

Atmospheric Measurement Techniques, 2011
Multiple Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) instruments can measure from the ground the absorption by nitrogen dioxide (NO2) of scattered sunlight seen in multiple viewing directions.
P. Wang, P. F. Levelt, L. F. L. Gast, A. J. C. Berkhout, A. J. M. Piters, T. Vlemmix   +5 more
doaj   +1 more source

Spectral Modeling of the Dark Signal for UV and VIS‐NIR AvaSpec‐2048 CCD‐Array Spectrometers

Earth and Space Science, Volume 13, Issue 1, January 2026.
Abstract The use of CCD‐array spectrometers has substantially increased in recent years in many different fields. Although they have numerous advantages over conventional scanning spectrometers, they need to be thoroughly characterized to correct for various sources of error. This study focuses on the experimental characterization of the dark signal of
A. Flores, A. Serrano, G. Sánchez‐Hernández, M. A. Obregón, J. M. Vilaplana   +4 more
wiley   +1 more source