Results 11 to 20 of about 1,941 (196)

Inversion of tropospheric profiles of aerosol extinction and HCHO and NO2 mixing ratios from MAX-DOAS observations in Milano during the summer of 2003 and comparison with independent data sets [PDF]

open access: yesAtmospheric Measurement Techniques, 2011
We present aerosol and trace gas profiles derived from MAX-DOAS observations. Our inversion scheme is based on simple profile parameterisations used as input for an atmospheric radiative transfer model (forward model).
U. Platt   +11 more
doaj   +1 more source

Formaldehyde total column densities over Mexico City: comparison between multi-axis differential optical absorption spectroscopy and solar-absorption Fourier transform infrared measurements [PDF]

open access: yesAtmospheric Measurement Techniques, 2021
Formaldehyde (HCHO) total column densities over the Mexico City metropolitan area (MCMA) were retrieved using two independent measurement techniques: multi-axis differential optical absorption spectroscopy (MAX-DOAS) and Fourier transform infrared (FTIR)
C. Rivera Cárdenas   +11 more
doaj   +1 more source

Cross-coupled DOA trackers [PDF]

open access: yesIEEE Transactions on Signal Processing, 1997
Peer ...
Pérez Neira, Ana Isabel   +2 more
openaire   +3 more sources

Two instruments based on differential optical absorption spectroscopy (DOAS) to measure accurate ammonia concentrations in the atmosphere [PDF]

open access: yesAtmospheric Measurement Techniques, 2012
We present two Differential Optical Absorption Spectroscopy (DOAS) instruments built at RIVM: the RIVM DOAS and the miniDOAS. Both instruments provide virtually interference-free measurements of NH<sub>3</sub> concentrations in the atmosphere,
H. Volten   +9 more
doaj   +1 more source

Degassing at Sabancaya volcano measured by UV cameras and the NOVAC network

open access: yesVolcanica, 2019
We used low-cost Raspberry Pi ultraviolet (UV) cameras to measure sulphur dioxide (SO2) fluxes from Sabancaya volcano, Peru, during eruptive activity on 27 April 2018.
Tehnuka Ilanko   +11 more
doaj   +1 more source

Inversion Models for the Retrieval of Total and Tropospheric NO2 Columns

open access: yesAtmosphere, 2019
Inversion models for retrieving the total and tropospheric nitrogen dioxide ( NO 2 ) columns from spaceborne remote sensing data are presented.
Song Liu
doaj   +1 more source

An improved retrieval of tropospheric NO2 from space over polluted regions using an Earth radiance reference [PDF]

open access: yesAtmospheric Measurement Techniques, 2015
A novel tropospheric NO2 DOAS retrieval algorithm optimised for a nadir-viewing satellite instrument imaging polluted areas is proposed in this work.
J. S. Anand, P. S. Monks, R. J. Leigh
doaj   +1 more source

Two-Stage Nested Array Direction of Arrival Estimation for Mixed Signals

open access: yesSensors, 2022
In this paper, a novel two-stage subspace-based direction of arrival (DOA) estimation algorithm with the nested array is proposed for mixed signals containing circular and non-circular ones.
Wanru Li, Ke Deng
doaj   +1 more source

Retrieval and evaluation of tropospheric-aerosol extinction profiles using multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements over Athens, Greece [PDF]

open access: yesAtmospheric Measurement Techniques, 2021
In this study, we report on the retrieval of aerosol extinction profiles from ground-based scattered sunlight multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements, carried out at Athens, Greece.
M. Gratsea   +17 more
doaj   +1 more source

DOA with SOA [PDF]

open access: yesQueue, 2007
It looks like today is finally the day that we all knew was coming. It was only a matter of time. An ambulance has just pulled up to haul away Marty the Software Manager after his boss pummeled him for failing to deliver on promises of money savings, improved software reuse, and reduced time to market that had been virtually guaranteed merely by ...
openaire   +2 more sources

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