Results 61 to 70 of about 2,611 (211)

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

Retrieval interval mapping: a tool to visualize the impact of the spectral retrieval range on differential optical absorption spectroscopy evaluations [PDF]

, 2013
Remote sensing via differential optical absorption spectroscopy (DOAS) has become a standard technique to identify and quantify trace gases in the atmosphere. Due to the wide range of measurement conditions, atmospheric compositions and instruments used,
Lampel, J., Platt, U., Sihler, H., Vogel, L., Wagner, T.   +4 more
core   +2 more sources

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

Reduced central alpha power at rest is associated with the risk of alcohol‐induced blackout and frequency of non‐REM parasomnia episodes in adults

Physiological Reports, Volume 14, Issue 6, March 2026.
Abstract People who experience alcohol‐induced blackouts (AIBs) are at increased risk of alcohol‐related injury and even death. Blackout susceptibility is heritable and blackouts are not experienced by all who engage in hazardous drinking. Blackout is defined by amnesia, but a person in the blackout state also maintains consciousness and motor control ...
Grace M. Elliott, Madeline M. Robertson, Celine E. Locklear, Donita L. Robinson, Margaret A. Sheridan, Charlotte A. Boettiger   +5 more
wiley   +1 more source

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

Comparison of ambient aerosol extinction coefficients obtained from in-situ, MAX-DOAS and LIDAR measurements at Cabauw [PDF]

, 2011
In the field, aerosol in-situ measurements are often performed under dry conditions (relative humidity RH < 30-40%). Since ambient aerosol particles experience hygroscopic growth at enhanced RH, their microphysical and optical properties - especially the
Apituley, A., Baltensperger, U., Beirle, S., Clemer, K., de Leeuw, G., Ehn, M., Frieß, U., Henzing, J., Irie, H., Mikkilä, J., Moerman, M., Petäjä, T., Shaiganfar, R., van Roozendael, M., Wagner, T., Weingartner, E., Wilson, K., Yilmaz, S., Zieger, P.   +18 more
core   +3 more sources

Comparative Assessment of Energetic Plasticizers Including NFPEG3N3 in a GAP/HMX Formulation: Mechanics, Stability, Combustion, and Performance

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 2, Page 269-276, February 2026.
ABSTRACT We examine the new energetic plasticizer 3‐(2‐(2‐(2‐azidoethoxy)ethoxy)ethoxy)‐4‐nitro‐1,2,5‐oxadiazole (NFPEG3N3), three reference compounds (BDNPA/F, Bu‐NENA, and DNDA‐57), and a plasticizer‐free control in a fixed HMX/GAP composite. NFPEG3N3 provides the strongest low‐temperature properties, yielding the lowest formulation glass transition ...
Patrick Lieber, Uwe Schaller, Thomas M. Klapötke   +2 more
wiley   +1 more source

AVCLNet: Multimodal Multispeaker Tracking Network Using Audio‐Visual Contrastive Learning

CAAI Transactions on Intelligence Technology, Volume 11, Issue 1, Page 238-255, February 2026.
ABSTRACT Audio‐visual speaker tracking aims to determine the locations of multiple speakers in the scene by leveraging signals captured from multisensor platforms. Multimodal fusion methods can improve both the accuracy and robustness of speaker tracking.
Yihan Li, Yidi Li, Zhenhuan Xu, Hao Guo, Mengyuan Liu, Weiwei Wan   +5 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