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LTA-9 FEASIBILITY STUDY REPORT

By: NON

Supplemental catalog subcollection information: NASA Publication Collection; Astrophysics and Technical Documents

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Measurements in a large angle oblique jet impingement flow

By: Foss, J. F

Supplemental catalog subcollection information: NASA Publication Collection; Astrophysics and Technical Documents; The flow field associated with the oblique impingement of an axisymmetric jet was investigated in the externally blown flap configuration fo...

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Influence of Turbidity and Clouds on Satellite Total Ozone Data Over Madrid (Spain) : Volume 28, Issue 7 (14/07/2010)

By: D. Loyola; E. Hernandez; M. Antón; J. L. Camacho

Description: Agencia Estatal de Meteorología (AEMET), Madrid, Spain. This article focuses on the comparison of the total ozone column data from three satellite instruments; Total Ozone Mapping Spectrometers (TOMS) on board the Earth Probe (EP), Ozone Monitoring Instrument (OMI) on board AURA and Global Ozone Monitoring Experiment (GOME) on board ERS/2, with ground-based measurement recorded by a well calibrated Brewer spectrophotometer located in Madrid during the period 1996–2008. A cluster classification based on solar radiation (global, direct and diffuse), cloudiness and aerosol index allow selecting hazy, cloudy, very cloudy and clear days. Thus, the differences between Brewer and satellite total ozone data for each cluster have been analyzed. The accuracy of EP-TOMS total ozone data is affected by moderate cloudiness, showing a mean absolute bias error (MABE) of 2.0%. In addition, the turbidity also has a significant influence on EP-TOMS total ozone data with a MABE ~1.6%. Those data are in contrast with clear days with MABE ~1.2%. The total ozone data derived from the OMI instrument show clear bias at clear and ...

Antón, M., Loyola, D., Navascúes, B., and Valks, P.: Comparison of GOME total ozone data with ground data from the Spanish Brewer spectroradiometers, Ann. Geophys., 26, 401–412, doi:10.5194/angeo-26-401-2008, 2008.; Antón, M., Loyola, D., López, M., Vilaplana, J. M., Bañón, M., Zimmer, W., and Serrano, A.: Comparison of GOME-2/MetOp total ozone data with Brewer spectroradiometer data over the Iberian Peninsula, Ann. Geophys., 27, 1377–1386, doi:10.5194/angeo-27-1377-2009, 2009a.; Antón, M., López, M., Vilaplana, J. M., Kroon, M., McPeters, R. D., Bañón, M., and Serrano, A.: Validation of OMI-TOMS and OMI-DOAS total ozone column using five Brewer spectroradiometers at the Iberian peninsula, J. Geophys. Res., 114, D14307, doi:10.1029/2009JD012003, 2009b.; Antón, M., Vilaplana, J. M., Kroon, M., Serrano, A., Parias, M., Cancillo, M. L., and de la Morena, B.: The empirically corrected EP-TOMS total ozone data against Brewer measurements at El Arenosillo (Southwestern Spain), IEEE Trans. Geosci. Remote Sens., 48(7), 3039–3045, 2010.; Balis, D., Lambert, J. C., van Roozendael, M., Spurr, R., Loyola, D., Livschitz, Y., Valks, P., Amiridis,...

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A Statistical Method for Evaluating Systematic Relationships

Document Series: http://biodiversitylibrary.org/oai

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A Statistical Method for Evaluating Systematic Relationships

By: R R Sokal

Document Series: http://biodiversitylibrary.org/oai

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A Statistical Method for Evaluating Systematic Relationshops

Document Series: http://biodiversitylibrary.org/oai

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A Statistical Method for Evaluating Systematic Relationships

Document Series: http://biodiversitylibrary.org/oai

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A Statistical Method for Evaluating Systematic Relationships

By: Sokal R and Michener C

Document Series: http://biodiversitylibrary.org/oai

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Simulation of Surface Runoff for Upper Tapi Subcatchment Area (Burhanpur Watershed) Using Swat : Volume Xl-8, Issue 1 (28/11/2014)

By: C. K. Singh; M. K. Goel; V. Shivhare

Description: Dept. of Natural Resource, TERI University, Vasant Kunj, New Delhi, India. Water related activity that takes place in one part of a river basin may have consequence in the other part. Any plan related to inter basin transfer of water from a water surplus basin to a deficit basin has to take into account the water availability and demands under the present and future scenarios of water use. Watershed is a hydrologic unit where all stream exit from the common outlet. In the present study, Tapi subcatchment area (Burhanpur watershed) located in inter-state basin of Madhya Pradesh and Maharashtra, India, is selected for the estimation of surface runoff using SWAT model. The SWAT works in conjunction with Arc GIS 9.3. Various parameters Digital Elevation Model (DEM), slope derived from DEM, Landuse/Landcover (LULC) and NBSSLUP soil data and temporal data for temperature and precipitation was used as input for the model to predict runoff at the catchment outlet. The model was run from the year 1992 to 1997. The performance of the model in terms of simulated runoff was evaluated using statistical method and compared si...

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An Improved Tropospheric No<Sub>2</Sub> Retrieval for Omi Observations in the Vicinity of Mountainous Terrain : Volume 2, Issue 2 (29/07/2009)

By: K. F. Boersma; R. Dirksen; D. Brunner; P. Wang; Y. Zhou

Description: Empa, Swiss Federal Lab. for Materials Testing and Research, Dübendorf, Switzerland. We present an approach to reduce topography-related errors of vertical tropospheric columns (VTC) of NO2 retrieved from the Ozone Monitoring Instrument (OMI) in the vicinity of mountainous terrain. This is crucial for reliable estimates of air pollution levels over our particular area of interest, the Alpine region and the adjacent planes, where the Dutch OMI NO2 product (DOMINO) exhibits significant biases due to the coarse resolution of surface parameters used in the retrieval. Our approach replaces the coarse-gridded surface pressures by accurate pixel-average values using a high-resolution topography data set, and scales the a priori NO2 profiles accordingly. NO2 VTC reprocessed in this way for the period 2006–2007 suggest that NO2 over the Po Valley in Italy and over the Swiss plateau is underestimated by DOMINO by about 15–20% in winter and 5% in summer under clear-sky conditions (cloud radiance fraction <0.5). A sensitivity analysis shows that these seasonal diff...

Acarreta, J. R., De Haan, J. F., and Stammes, P.: Cloud pressure retrieval using the O$_2-$O2absorption band at 477 nm, J. Geophys. Res., 109, D05204, doi:10.1029/2003JD003915, 2004.; ATBD GDP 4.0: Algorithm Theoretical Basis Document for GOME Total Column Densities of Ozone and Nitrogen Dioxide, UPAS/GDOAS: GDP 4.0, ERSE-DTEX-EOPGTN-04-0007, Iss./Rev. 1/A, 2004.; Bertram, T. H., Heckel, A., Richter, A., Burrows, J. P., and Cohen, R. C.: Satellite measurements of daily variations in soil NOx emissions, Geophys. Res. Lett., 32(24), L24812 doi:10.1029/2005GL024640, 2005.; Blond, N., Boersma, K. F., Eskes, H. J., van der A, R. J., Van Roozendael, M., De Smedt, I., Bergametti, G., and Vautard, R.: Intercomparison of SCIAMACHY nitrogen dioxide observations, in-situ measurements and air quality modeling results over Western Europe, J. Geophys. Res., 112, D10311, doi:10.1029/2006JD007277, 2007.; Boersma, K. F., Eskes, H. J., and Brinksma, E. J.: Error analysis for tropospheric NO2 retrieval from space, J. Geophys. Res., 109, D04311, doi:10.1029/2003JD003962, 2004.; Boersma, K. F., Eskes, H. J., Veefkind, J....

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Large-scale Distributions of Ionospheric Horizontal and Field-aligned Currents Inferred from Eiscat : Volume 14, Issue 12 (30/11/-0001)

By: C. Peymirat; D. Fontaine

Description: CETP-CNRS, Centre Universitaire, 10-12 Avenue de l'Europe, 78140 Vélizy, France. Statistical models for large-scale convection and for ionospheric conductances were previously derived from observations of the incoherent-scatter radar EISCAT. We complete this large-scale description with statistical models of the horizontal and field-aligned currents achieved from the same data base and for the same ranges of the magnetic activity index Kp. Except for the high-latitude dayside currents generally located poleward of the radar field of view, a large part of the whole current system can be probed with EISCAT. Globally consistent with previously published models, our results also exhibit some differences, such as the asymmetry in the local-time extension of the current sheets, concentrated to a few hours around 18 MLT in the evening sector, while widely spread from premidnight to prenoon magnetic local times on the morningside. This statistical description of the current system above EISCAT allowed us to examine several aspects of the large-scale auroral electrodynamics, namely the relationships between c...

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An Optimised Method for Calculating the O<Sup>+</Sup>-o Collision Parameter from Aeronomical Measurements : Volume 13, Issue 5 (30/11/-0001)

By: A. Aruliah; A. D. Farmer; C. J. Davis

Description: A study has been made of the interaction between the thermosphere and the ionosphere at high latitudes, with particular regard to the value of the O+-O collision parameter. The European incoherent scatter radar (EISCAT) was used to make tristatic measurements of plasma parameters at F-region altitudes while simultaneous measurements of the neutral wind were made by a Fabry-Perot interferometer (FPI). The radar data were used to derive the meridional neutral winds in a way similar to that used by previous authors. The accuracy of this technique at high latitudes is reduced by the dynamic nature of the auroral ionosphere and the presence of significant vertical winds. The derived winds were compared with the meridional winds measured by the FPI. For each night, the value of the O+-O collision parameter which produced the best agreement between the two data sets was found. The precision of the collision frequency found in this way depends on the accuracy of the data. The statistical method was critically examined in an attempt to account for the variability in the data sets. This study r...

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Montana economic indicators; Issue: 1978 4TH QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1981 1ST QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1980 3RD QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1980 2ND QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1980 1ST QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1979 4TH QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1979 3RD QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Montana economic indicators; Issue: 1977 2ND QTR

By: Montana. Employment Security Division. Research and Analysis Section

An analysis of past and present economic trends.; Continues: Montana economic indicators, ISSN 0146-4302, issued by: Montana. State Employment Service. Research and Analysis; 4:MONTANA ECONOMIC INDICATORS SUMMER 1976-FALL 1981...

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Records: 1 - 20 of 3,911 - Pages: 
 
 





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