Journal of Quantitative Spectroscopy & Radiative Transfer最新文献

{"title":"An improved study of cyanoacetylene and diacetylene including the strong 2ν5 band of HC3N and ν4 band of HC4H","authors":"Luca Bizzocchi ,&nbsp;Mattia Melosso ,&nbsp;Filippo Tamassia ,&nbsp;Martina Taddia ,&nbsp;Francesca Tonolo ,&nbsp;Silvia Alessandrini ,&nbsp;Gabriele Panizzi ,&nbsp;Michela Nonne ,&nbsp;Marie-Aline Martin-Drumel ,&nbsp;Olivier Pirali ,&nbsp;Luca Dore ,&nbsp;Iouli E. Gordon ,&nbsp;Cristina Puzzarini","doi":"10.1016/j.jqsrt.2026.109879","DOIUrl":"10.1016/j.jqsrt.2026.109879","url":null,"abstract":"<div><div>This paper presents an extension of the previous spectroscopic investigations for the linear molecules HC₃N and HC₄H. For both species, new high-resolution data have been recorded and analyzed. As far as HC₃N is concerned, the investigation of the ro-vibrational features has been based on the Fourier transform far-infrared spectra from our previous studies and on the mid-infrared spectra targeting the prominent <span><math><mrow><mn>2</mn><msub><mrow><mi>ν</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> overtone band recently recorded at the synchrotron facility SOLEIL with a resolution of 0.003 and 0.002<!--> <!-->cm⁻¹. Moreover, several hundreds of pure rotational transitions belonging to excited vibrational states were recorded in Bologna. The resonance network wrapping around the <span><math><mrow><msub><mrow><mi>v</mi></mrow><mrow><mn>5</mn></mrow></msub><mo>=</mo><mn>2</mn></mrow></math></span> level and involving the (<span><math><mrow><msub><mrow><mi>v</mi></mrow><mrow><mn>4</mn></mrow></msub><mo>=</mo><mn>1</mn><mo>,</mo><msub><mrow><mi>v</mi></mrow><mrow><mn>7</mn></mrow></msub><mo>=</mo><mn>2</mn></mrow></math></span>), (<span><math><mrow><msub><mrow><mi>v</mi></mrow><mrow><mn>6</mn></mrow></msub><mo>=</mo><mn>2</mn><mo>,</mo><msub><mrow><mi>v</mi></mrow><mrow><mn>7</mn></mrow></msub><mo>=</mo><mn>2</mn></mrow></math></span>), (<span><math><mrow><msub><mrow><mi>v</mi></mrow><mrow><mn>5</mn></mrow></msub><mo>=</mo><mn>1</mn><mo>,</mo><msub><mrow><mi>v</mi></mrow><mrow><mn>7</mn></mrow></msub><mo>=</mo><mn>3</mn></mrow></math></span>), and <span><math><mrow><msub><mrow><mi>v</mi></mrow><mrow><mn>7</mn></mrow></msub><mo>=</mo><mn>6</mn></mrow></math></span> excited states has been thoroughly analyzed. A global ro-vibrational fit was then achieved for all the vibrational levels up to 1300<!--> <!-->cm⁻¹, therefore improving our previous analysis. For diacetylene, the <span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> stretching band around 3333<!--> <!-->cm⁻¹ was recorded by high-resolution FTIR spectroscopy at the synchrotron facility SOLEIL at a resolution of 0.005<!--> <!-->cm⁻¹. The accidental resonance affecting this band has been successfully analyzed and the number of observed and assigned ro-vibrational transitions was considerably extended. The present investigation allowed the integration of the existing line lists in the HITRAN database for both molecules. In particular, no information about the <span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> band of diacetylene was present in HITRAN before this study.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"357 ","pages":"Article 109879"},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extending geostationary satellite AOD coverage with a lightweight spatiotemporal sequence model","authors":"Yi Wang ,&nbsp;Jinjun Liu ,&nbsp;Rebekah Esmaili ,&nbsp;Mark Schoeberl","doi":"10.1016/j.jqsrt.2026.109899","DOIUrl":"10.1016/j.jqsrt.2026.109899","url":null,"abstract":"<div><div>Satellite nadir retrievals of Aerosol Optical Depth (AOD) cannot be made over clouds which can limit their use for near-real-time air-quality monitoring. We evaluate a simple time-series approach that increases AOD coverage over clouds by predicting short-term transport and filling gaps using Machine Learning (ML). We use a single-channel convolutional long short-term memory (ConvLSTM) sequence model trained on NOAA GOES-18 ABI AOD dataset. Predicted plumes reproduce observed spatial organization despite the presence of clouds, and when composited into the observed AOD field by filling missing pixels, the model provides spatially coherent AOD estimates over obscured regions. With longer lead times, predictions become smoother and high-AOD extremes are unrealistically suppressed, narrowing the dynamic range relative to observations. Motion, quantified by an AOD-weighted centroid, shows frame-to-frame step distances that are smaller than observed. The distances decline with time, indicating accumulated transport error and under-advection of filaments. In addition, scene-mean AOD and its standard deviation are lower in predictions than in observations and decrease further with longer lead time (in 20-min intervals between frames). Performance degrades with increasing lead time and during prolonged, widespread obscuration, and may be less reliable for abrupt aerosol regime shifts. We compare ML model gap filling with ordinary kriging anchored to observed edges: kriging yields the smoother fields and tends to elevate AOD over broader regions, whereas ML-based filling preserves plume organization, avoids some edge amplification, and produces fewer extremes. Overall, a ConvLSTM provides timely AOD nowcasts and substantially extends coverage for short lead times, although performance degrades with lead time.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"357 ","pages":"Article 109899"},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polarized reflectance in China from DPC-2/GF-5(02) polarimetric satellite measurements: dataset and model inter-comparison","authors":"Qingyun Liu, Zhengqiang Li, Zihan Zhang, Guangliang Fu, Otto Hasekamp, Li Li, Yang Bai, Cheng Fan","doi":"10.1016/j.jqsrt.2026.109961","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2026.109961","url":null,"abstract":"The Bidirectional Polarization Distribution Function (BPDF) is essential in quantitative remote sensing, particularly for understanding the anisotropy of land surface polarization properties. The widely-used BRDF-BPDF dataset claimed to not corrected for aerosol scattering, which lay a hidden problem for BPDF modeling. In our work, we conducted aerosol correction based on Chinese polarimetric data DPC-2/GF-5(02), and we established a BPDF dataset, namely the BPDF-DPC-CN dataset (this dataset is open-source for the community at: <ce:inter-ref xlink:href=\"https://doi.org/10.57760/sciencedb.20798\" xlink:role=\"http://www.elsevier.com/xml/linking-roles/research-data\" xlink:type=\"simple\">https://doi.org/10.57760/sciencedb.20798</ce:inter-ref>). We utilized Sun-sky radiometer Observation NETwork (SONET) ground-based observation data to conduct the polarimetric atmospheric correction, and only BPDF data with low aerosol load and high polarimetric atmospheric correction accuracy were kept in our proposed dataset. We validated and intercompared 6 leading BPDF models (i.e., Nadal-Bréon model, Waquet model, Maignan model, Litvinov model, Diner model and Xie-Cheng model) with our dataset and achieved high accuracy (e.g., for statistical results of the best performing model, which is Nadal-Bréon model, the average correlation coefficient is 0.902, and the average root mean square error is 0.080%). The aim of our study is to evaluate six leading semi-empirical BPDF models using a dataset derived from polarimetric on-orbit measurements matched with ground-based observations, while simultaneously validating our proposed dataset, which can be used to fit the free parameters for calculating polarized reflectance in ground-atmosphere decoupling. We also qualitatively analyzed the spatial distribution of BPDF over China and identified clusters associated with International Geosphere-Biosphere Programme (IGBP) surface types.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"25 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rovibrational assignments of the ammonia absorption spectrum between 8900 and 10400 cm−1","authors":"P. Cacciani, A. Campargue","doi":"10.1016/j.jqsrt.2026.109945","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2026.109945","url":null,"abstract":"Using an ammonia absorption spectrum recorded at Kitt Peak in 1980, a room temperature empirical list of about 12000 absorption lines has been recently published by Barton et al. for the 8900–10400 cm<ce:sup loc=\"post\">−1</ce:sup> range (JQSRT 203(2017)392–397 10.1016/j.jqsrt.2017.03.042). Using a variational line list, BYTe, these authors assigned 642 transitions of the 9400-9850 cm<ce:sup loc=\"post\">−1</ce:sup> interval were rovibrationally assigned. The resulting partially assigned list is reproduced in the current version of the HITRAN database. In the present work, based on a more accurate variational list, C2018, we extend the assignments to 1736 transitions spanning the full 8900–10400 cm<ce:sup loc=\"post\">−1</ce:sup> region and show that a large part of the previous assignments was incorrect. Most of our assignments are validated by using lower state combination difference relations (LSCD). They correspond to 751 distinct upper states whose empirical energy is provided with a typical uncertainty of 0.001 cm<ce:sup loc=\"post\">−1</ce:sup>. The assigned transitions represent about 59 % of the intensity sum in the region.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"130 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147681281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beyond-Voigt collisional parameters of subTHz H2O lines for atmospheric applications","authors":"M.A. Koshelev,&nbsp;I.N. Vilkov,&nbsp;D.S. Makarov,&nbsp;G.Yu. Golubiatnikov,&nbsp;A.O. Koroleva,&nbsp;T.A. Galanina","doi":"10.1016/j.jqsrt.2026.109854","DOIUrl":"10.1016/j.jqsrt.2026.109854","url":null,"abstract":"<div><div>The profiles of nine key subTHz H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O lines were recorded at various pressures and room temperature using two fundamentally different spectroscopic techniques. The beyond-Voigt line shape taking into account the speed-dependence of the collision relaxation rate was employed to analyze the high quality experimental recordings. Collisional broadening, shifting and their quadratic speed-dependence were measured for major atmospheric perturbers H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O, N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, O<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, and Ar. The found air-related line shape parameters can be used for updating atmospheric databases and propagation models.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"353 ","pages":"Article 109854"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The HITRAN2024 molecular spectroscopic database","authors":"I.E. Gordon ,&nbsp;L.S. Rothman ,&nbsp;R.J. Hargreaves ,&nbsp;F.M. Gomez ,&nbsp;T. Bertin ,&nbsp;C. Hill ,&nbsp;R.V. Kochanov ,&nbsp;Y. Tan ,&nbsp;P. Wcisło ,&nbsp;V. Yu. Makhnev ,&nbsp;P.F. Bernath ,&nbsp;M. Birk ,&nbsp;V. Boudon ,&nbsp;A. Campargue ,&nbsp;A. Coustenis ,&nbsp;B.J. Drouin ,&nbsp;R.R. Gamache ,&nbsp;J.T. Hodges ,&nbsp;D. Jacquemart ,&nbsp;E.J. Mlawer ,&nbsp;N.F. Zobov","doi":"10.1016/j.jqsrt.2026.109807","DOIUrl":"10.1016/j.jqsrt.2026.109807","url":null,"abstract":"<div><div>The HITRAN database is a curated compilation of validated molecular spectroscopic parameters, established in the early 1970s. It is used by various computer codes to predict and simulate the transmission and emission of light in gaseous media (with an emphasis on terrestrial and planetary atmospheres). The HITRAN compilation is composed of six major components. These components include the line-by-line spectroscopic parameters required for high-resolution radiative-transfer codes, experimentally derived absorption cross-sections (for molecules where it is not yet feasible for representation in a line-by-line form), collision-induced absorption data, aerosol indices of refraction, and general tables (including partition sums) that apply globally to the data. Responding to community requests, HITRAN2024 also incorporates — for the first time — a water-vapor continuum model.</div><div>This paper describes the details of the choices of data and their compilation for the 2024 quadrennial edition of HITRAN. The HITRAN2024 edition takes advantage of recent experimental and theoretical data that were meticulously validated, in particular, against laboratory and atmospheric spectra. The new edition replaces the previous HITRAN edition of 2020 (including various updates during the intervening years).</div><div>The extent of the updates of the line-by-line section in the HITRAN2024 edition ranges from updating a few lines of specific molecules/isotopologues to complete replacements of the lists, and also the introduction of additional isotopologues and six new (to HITRAN) molecules: H<span><math><msubsup><mrow></mrow><mrow><mn>3</mn></mrow><mrow><mo>+</mo></mrow></msubsup></math></span>, CH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>, S<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, COFCl, HONO, ClNO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>. Many new vibrational bands were added, extending the spectral coverage and completeness of the line lists. In addition, the accuracy of the parameters for major atmospheric absorbers has been increased substantially, often bringing the uncertainties down to unprecedented levels below 0.1%.</div><div>The HITRAN2024 edition is available through <span><span>www.hitran.org</span><svg><path></path></svg></span> as well as the HITRAN Application Programming Interface (HAPI). The functionality of the tools to work with the HITRAN data has been extended for the new edition.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"353 ","pages":"Article 109807"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of ZJU high-spectral-resolution lidar for aerosol and cloud: Comparison between dual-FOV HSRL and polarized lidar for water cloud detection","authors":"Yao Sun ,&nbsp;Jingxin Zhang ,&nbsp;Lan Wu ,&nbsp;Chonghui Cheng ,&nbsp;Weize Li ,&nbsp;Kai Zhang ,&nbsp;Xueping Wan ,&nbsp;Wentai Chen ,&nbsp;Zhiji Deng ,&nbsp;Ming Liu ,&nbsp;Miao Cheng ,&nbsp;Zhewei Fu ,&nbsp;Dong Liu","doi":"10.1016/j.jqsrt.2026.109835","DOIUrl":"10.1016/j.jqsrt.2026.109835","url":null,"abstract":"<div><div>Observations of water cloud optical and microphysical properties are indispensable for quantifying its radiative forcing and improving predictions of climate change. In this paper, comparisons between two lidar-based techniques for water cloud detection, i.e., dual-field-of-view high-spectral-resolution lidar (dual-FOV HSRL) and the polarized Mie-scattering lidar (PML), with consideration of multiple scattering effects are presented. The retrieval results from Monte Carlo (MC) simulations with both techniques are compared, demonstrating that the extinction coefficient (<em>α_c</em>) and effective radius (<em>r_eff</em>) retrieved by dual-FOV HSRL exhibit smaller root mean square error (<em>RMSE</em>) and relative bias values than those from PML under a typical water cloud scenario. A case study of the measurements performed with Zhejiang University high-spectral-resolution lidar for aerosol and cloud (ZJU-HSRL) system at Hangzhou, China, is presented, and the results show that the dual-FOV HSRL technique is a more stable and flexible approach for profiling realistic water cloud vertical structures, especially under the influence of dry air entrainment.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"353 ","pages":"Article 109835"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Continuum absorption of millimeter waves by CH4-X (X=CH4, N2, CO2)","authors":"A.O. Koroleva ,&nbsp;T.A. Galanina ,&nbsp;I.S. Amerkhanov ,&nbsp;E.A. Serov ,&nbsp;A.Yu. Sekacheva ,&nbsp;M.A. Koshelev ,&nbsp;D.N. Chistikov ,&nbsp;A.A. Finenko ,&nbsp;M.Yu. Tretyakov","doi":"10.1016/j.jqsrt.2026.109841","DOIUrl":"10.1016/j.jqsrt.2026.109841","url":null,"abstract":"<div><div>The room-temperature continuum absorption of pure methane and of its mixture with nitrogen and carbon dioxide was measured in the millimeter wavelength range using resonator spectrometer. The line wings contribution to the continuum was estimated to be weak. The bimolecular nature of the observed continuum was confirmed by both the expected pressure dependences and the agreement with trajectory-based simulation.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"353 ","pages":"Article 109841"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High accurate analysis of the excited (v4 = 1) and (v4 = 2) vibrational states of 12CH235Cl37Cl in the region up to 1.1 THz","authors":"O.N. Ulenikov,&nbsp;O.V. Gromova,&nbsp;E.S. Bekhtereva,&nbsp;Yu.V. Khudyakova,&nbsp;V.E. Nikolaeva","doi":"10.1016/j.jqsrt.2026.109832","DOIUrl":"10.1016/j.jqsrt.2026.109832","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The high resolution submillimeter wave spectra of methylene chloride (earlier recorded in the I. Physikalisches Institut, Universität zu Köln (Germany) and Laboratoire PhLAM, Université de Lille (France) in the wide spectral region of 0.075–1.1 THz) were analyzed with the goal of high accurate description of the quadrupole-rotational structures of the &lt;sup&gt;12&lt;/sup&gt;CH&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;35&lt;/sup&gt;Cl&lt;sup&gt;37&lt;/sup&gt;Cl species in the (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 1) and (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 2) vibrational states. Assignment and analysis of transitions was made in the frame of the Watson’s Hamiltonian in &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;reduction and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;I&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; representation with the use of the ASYMTOPTPU computer code and SPFIT/SPCAT package of Pickett. The 4983 unresolved lines (4088 transitions) in the excited (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 1) vibrational state and 842 lines (1420 transitions) in the (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 2)) vibrational state with the maximum values of quantum number &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;J&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mtext&gt;max&lt;/mtext&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; = 95/79 and &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mtext&gt;max&lt;/mtext&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt; = 19/19 for the (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 1) and (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 2) vibrational states were assigned in the experimental spectra. Weighted fit of the rotational and centrifugal distortion parameters, as well as, of the quadrupole splitting parameters was made. The obtained from the fit 19/16 rotational and centrifugal distortion parameters reproduces values of the 4983/842 experimental line positions (4088/1420 transitions) with the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mtext&gt;rms&lt;/mtext&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 21/26 kHz for the states (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 1) and (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; = 2). Comparison with the rotational and centrifugal distortion parameters known in the literature is made and shown that the latter reproduce the same (assigned in the present study) set of the experimental line positions with the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mtext&gt;rms&lt;/mtext&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; values which are considerably worse in comparison with the results of the present study. As to the quadrupole coupling &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;χ&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;parameters, ","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"353 ","pages":"Article 109832"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generic polychromatic light scattering theories for particles of arbitrary shapes and morphologies illuminated by laser pulses","authors":"Gérard Gouesbet ,&nbsp;Leonardo A. Ambrosio ,&nbsp;Jhonas O. de Sarro","doi":"10.1016/j.jqsrt.2026.109834","DOIUrl":"10.1016/j.jqsrt.2026.109834","url":null,"abstract":"<div><div>We discuss a synthesis between (i) a generic formulation of generalized Lorenz–Mie theory (more generally of arbitrary light scattering theories) for an arbitrary scatterer illuminated by one laser pulse and (ii) a polychromatic generalized Lorenz–Mie theory in the strict sense, i.e. for a spherical homogeneous spherical particle, illuminated by several polychromatic non-continuous beams. The synthesis then takes the form of generic polychromatic light scattering theories for particles of arbitrary shapes and morphologies illuminated by several laser pulses, or train of pulses. Although the present work is discussed in an electromagnetic framework, it can be adapted to scalar, in particular acoustical, scattering.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"353 ","pages":"Article 109834"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}