Browsing NILU by Subject "Radiative transfer"
Now showing items 1-5 of 5
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Measurement of volcanic ash in Norwegian air space. WP 1.4.2 Improved detection of ash clouds.
(NILU OR;39/2013, Research report, 2013)Water and ice clouds and temperature conditions may often influence the detection of volcanic ash affected pixels in infrared satellite images. Several methods are available for the detection of ash clouds in SEVIRI images. ... -
Measurement of volcanic ash in Norwegian air space. WP 1.4.4 Reduced uncertainty in satellite-based estimates of ash concentrations.
(NILU OR;35/2013, Research report, 2013)Satellite-based measurements of volcanic ash give the total amount of volcanic ash per area, typically in units of grams of volcanic ash per square meter. To convert this to concentration the vertical thickness of the ash ... -
Rotational Raman scattering in the O2-A and O2-B bands: simulations for Carbonsat, FLEX/FLORIS, MERIS and OLCI.
(NILU OR;10/2012, Research report, 2012)Rotational Raman scattering (RRS) causes filling-in of absorption lines in Earth shine spectra. It is routinely accounted for in analysis of UV and visible spectra measured both by satellite and ground-based instruments. ... -
WP 1.2 Operationalization of satellite-based volcanic ash measurements.
(NILU OR;10/2013, Research report, 2013)Data from the SEVIRI instrument is available at NILU through EUMETCast. These data are processed at NILU to retrieve volcanic ash loading in a satellite pixel. The report describes operationalization and automatization of ... -
WP 1.4.1: Visualization of modelled SEVIRI IR-scenes for quality control.
(NILU OR;11/2013, Research report, 2013)The SEVIRI instrument produces infrared images. The report describes how the RTTOV radiative transfer model is used to simulate SEVIRI images for an ash situation.