44
44
Nov 2, 2009
11/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
image
eye 44
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Note: Cloud cover over Borneo for March 1, 1998 superimposed over a topographic image. Data Collected: 3/1/98. Animator: Greg Shirah (NASA/GSFC). Scientist: Daniel Rosenfeld (Hebrew University).
Topic: Atmospheric science, Cloud Cover
Source: http://svs.gsfc.nasa.gov/goto?747
This thesis compares RTNEPH and NOGAPS analyses for high, middle, and low clouds during January 1998 and October 1997. We believe that the RTNEPH analyses are reasonably accurate except for in the polar regions and the low clouds. NOGAPS forecasts at 12, 24, 36, and 48h are compared with the appropriate RTNEPH analyses. The difference fields averaged over a month show a rapid increase in the first 12 h over the forecast, followed by a slow growth to 48 h. The rapid increase is caused by model...
Topic: Cloud cover analysis and forecast
192
192
Jun 1, 2010
06/10
by
Galperin, B. M.; Seryakova, L. P
texts
eye 192
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Effect of shape and number of clouds and state of solar disk on intensity of scattered and total solar radiation
Topics: CLOUD COVER, RADIANT FLUX DENSITY, SHAPES, SOLAR RADIATION, SUN, CLOUD COVER, RADIATION INTENSITY,...
Mendeley Climate Change Library
24
24
Jul 6, 2019
07/19
by
Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra; Anoop Kumar Mishra
texts
eye 24
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In this study, linkage between changing characteristics of precipitation extremes and cloud covers over Central India is explored during summer monsoon period using Satellite data (1998–2015). This is a first attempt to relate the changes in cloud cover to the changes in precipitation extremes. Non-rainy cirrus clouds are excluded from this study. Results show that heavy rainfall (≥ 60 mm/day)is associated with cold cloud tops (Tb≤220 K)while moderate rainfall ( 220 K and ≤245 K). Low...
Topics: Climate change, Cloud cover, Convection, Drought, Flood, Precipitation
Mendeley Climate Change Library
21
21
Jul 6, 2019
07/19
by
Brigadier Libanda; Namwiinga Babra Nkolola; Ngonga Chilekana; Kelvin Bwalya
texts
eye 21
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Diurnal temperature range (DTR)is an important index for climate because of its statistical relationships to greenhouse gases, urban heat, cloud cover, land use change, and aerosol haze layers. This study examines DTR trends across Zambia for the period 1930–2016 using the latest version of high-resolution monthly data (CRU TS v4.01)from the Climatic Research Unit. Non-parametric trend analyses were extensively employed at different spatial and temporal scales to quantify DTR changes. Taken...
Topics: Climate change, Cloud cover, Diurnal temperature range, Rainfall, Zambia
171
171
Jul 6, 2010
07/10
by
KESNER, Z
texts
eye 171
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THE PHYSICAL AND TECHNOLOGICAL AGREEMENT CONDITIONS BETWEEN THE MODEL AND THE ORIGINAL ACOUSTIC FIELD ARE CONSIDERED. THE EFFECT OF INDIVIDUAL FACTORS ON THE ACCURACY OF THE RESULTS AND ON THE CHOICE OF THE MODEL SCALE IS DISCUSSED. THE MAIN LIMITATION IS THE FREQUENCY-DEPENDENT ABSORPTION OF ULTRASONIC WAVES PROPAGATING IN THE AIR, FROM THE POINT OF VIEW OF THE MEASURING APPARATUS, ELECTROACOUSTICAL TRANSDUCERS PRESENT THE MOST CHALLENGING PROBLEMS. IT WAS DETERMINED THAT THE MODELING OF...
Topics: CLOUD COVER, NOCTILUCENT CLOUDS, ATMOSPHERIC CIRCULATION, GEOGRAPHIC DISTRIBUTION, MESOSPHERE,...
38
38
Oct 29, 2009
10/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
movies
eye 38
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Note: Simulation of cloud cover over Antarctica and South America during February 2002. Animator: Eric Sokolowsky (GST). Scientist: David Adamec (NASA/GSFC). Platforms/Sensors/Data Sets: NSIPP Atmospheric General Circulation Model/Cloud Cover.
Topic: Atmospheric science, Cloud Cover, NSIPP, Location, Antarctica, Location, South America
Source: http://svs.gsfc.nasa.gov/goto?2394
255
255
Dec 1, 2012
12/12
by
Nigel B. Cook
texts
eye 255
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comment 0
CO2 injection (global warming) cancellation by decreasing H2O vapour and increasing cloud cover A very brief two-page summary of CO2 opposing ânegative feedbackâ data ignored/discounted by all IPCC reports.
Topics: global warming, AGW, climate change, CO2, H2O, cloud cover, negative feedback
120
120
Jul 11, 2010
07/10
by
Douglas, F. C.; Galasso, F. S
texts
eye 120
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Studies which have been done in an earth-based laboratory environment have generally not yielded specimens with the degree of perfection required of the eutectic microstructure to provide test data to evaluate their nonstructural applications. It has been recognized that the low-g environment of an orbiting space laboratory provides a unique environment to re-examine the process of solidification with the goal of producing better microstructures. The objective of this program is to evaluate the...
Topics: HEAT TRANSFER, TROPOSPHERE, BOUNDARY LAYERS, CLOUD COVER, HEAT FLUX, WEATHER FORECASTING
245
245
Jun 27, 2010
06/10
by
Baumeister, K. J.; Graham, R. W.; Papell, S. S
texts
eye 245
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comment 0
Film boiling and heat transfer from platinum wire in saturated liquid nitrogen up to critical pressure
Topics: CLOUD COVER, METEOROLOGICAL SATELLITES, SIMULATION, SPATIAL DISTRIBUTION, ENERGY TRANSFER,...
30
30
Oct 29, 2009
10/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
movies
eye 30
favorite 0
comment 0
Note: Simulation of cloud cover over Antarctica and South America during the 1998 La Nina. Animator: Eric Sokolowsky (GST). Scientist: David Adamec (NASA/GSFC). Platforms/Sensors/Data Sets: NSIPP Atmospheric General Circulation Model/Cloud Cover.
Topic: Atmospheric science, Cloud Cover, La Nina, NSIPP, Location, Antarctica, Location, South America
Source: http://svs.gsfc.nasa.gov/goto?2393
33
33
Oct 29, 2009
10/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
movies
eye 33
favorite 0
comment 0
Note: Simulation of cloud cover over Antarctica and South America during the 1997-1998 El Nino. Animator: Eric Sokolowsky (GST). Scientist: David Adamec (NASA/GSFC). Platforms/Sensors/Data Sets: NSIPP Atmospheric General Circulation Model/Cloud Cover.
Topic: Atmospheric science, Cloud Cover, El Nino, NSIPP, Location, Antarctica, Location, South America
Source: http://svs.gsfc.nasa.gov/goto?2392
351
351
Jul 9, 2010
07/10
by
AVDUYEVSKIY, V. S.; ZAVELEVICH, F. S.; MAROV, M. Y.; NOYKINA, A. I.; POLEZHAYEV, V. I
texts
eye 351
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THE TRANSFER OF RADIATION IN A FLAT LAYER OF GAS, IN THE INFRARED WHERE THE SURFACE SPECTRAL BRIGHTNESS OF VENUS IS MAXIMUM AND WHERE THE MAJOR CO2 AND H2O ABSORPTION BANDS EXIST, IS ANALYZED. THE GAS IS ASSUMED TO BE TRANSPARENT IN THE VISIBLE, FAR-ULTRAVIOLET AND NEAR-INFRARED BANDS OF THE SOLAR SPECTRUM, AND THE CURVATURE OF THE SURFACE LAYER OF THE ATMOSPHERE IS CONSIDERED NEGLIGIBLE.
Topics: AERIAL PHOTOGRAPHY, ARGENTINA, LANDSAT 1, CLOUD COVER, PAMPAS, REMOTE SENSORS, TABLES (DATA)
34
34
Mar 14, 2016
03/16
by
Patrick H. Stakem
texts
eye 34
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white paper establishing the feasibility of spacecraft onboard data processing of hyperspectral data and generating data products. Applicable to cubesats.
Topics: satellite onboard processing, cloud cover assessment from orbit, hyperspectral instrument, adaptive...
296
296
Jul 11, 2010
07/10
by
Kuenzly, J. D
texts
eye 296
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The feasibility of operating small thrust level electrothermal thrusters with monopropellants other than MIL-grade hydrazine was studied. Analytical study, design, and fabrication of demonstration thrusters was performed, and an evaluation test program was initiated to evaluate monopropellants with freezing points lower than MIL-grade hydrazine, and to determine their applicability to electrothermal thrusters for spacecraft attitude control. Five demonstration thrusters were fabricated to...
Topics: CLOUD COVER, EARTH SURFACE, SHADOWS, EARTH RESOURCES, METEOROLOGICAL SATELLITES, MODELS, SATELLITE...
122
122
Jul 11, 2010
07/10
by
KHATSKEVICH, J. G.; EYSMONT, N. A
texts
eye 122
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ALGORITHMS ARE PRESENTED FOR CALCULATING THE ORIENTATION OF THE PROGNOZ SERIES ARTIFICIAL EARTH SATELLITES. SEVERAL DIFFERENT COORDINATE SYSTEMS, INCLUDING THE KOENIG COORDINATE SYSTEM, ARE INTRODUCED AND TRANSITION MATRICES FROM ONE COORDINATE SYSTEM TO ANOTHER ARE DISCUSSED.
Topics: CLOUD PHOTOGRAPHY, CYCLONES, TROPICAL STORMS, WEATHER FORECASTING, ATLANTIC OCEAN, CLOUD COVER,...
325
325
Jul 10, 2010
07/10
by
GURSHTEYN, A. A
texts
eye 325
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THE SCIENTIFIC ACHIEVEMENTS OF THE SOVIET UNION IN SPACE RESEARCH SINCE 1957 ARE DESCRIBED. THE OPERATION OF THE LUNOKHOD SPACECRAFT ON THE SURFACE OF THE MOON IS DISCUSSED, AND THE GEOLOGICAL-MORPHOLOGICAL DATA OBTAINED ARE ITEMIZED.
Topics: CLOUD COVER, COSMOS SATELLITES, METEOROLOGICAL PARAMETERS, INFRARED RADIATION, MICROWAVE...
375
375
Jun 21, 2010
06/10
by
Venzlaff, U
texts
eye 375
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Human psychological reactions and later psychotic and psychosomatic effects of confinement in prisoner of war and concentration camps
Topics: ASTRONOMICAL OBSERVATORIES, NOCTILUCENT CLOUDS, AZIMUTH, CLOUD COVER, HEIGHT, SHAPES, SKY...
395
395
Jun 13, 2011
06/11
by
Schwarze, Gene E
texts
eye 395
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The primary means to develop advanced electrical components is to develop new and improved materials for magnetic components (transformers, inductors, etc.), capacitors, and semiconductor switches and diodes. This paper will give an update of the Advanced Power Electronics and Components Technology being developed by the NASA Glenn Research Center for use in future Power Management and Distribution subsystems used in space power systems for spacecraft and lunar and planetary surface power. The...
Topics: ANTARCTIC REGIONS, ATMOSPHERIC COMPOSITION, CLOUD COVER, STRATOSPHERE, VERTICAL DISTRIBUTION,...
The objective of this task is to provide the UAV-BPI IRST development effort with a utility for producing cloud scenes for use in the Synthetic Scene Generation Model (SSGM). As currently configured, SSGM comes with only a handful of cloud scenes, which are not necessarily adequate to fully represent the range of cloud conditions in the theaters of interest. The cloud generation utility produced under this effort utilizes historical cloud coverage data for the regions of interest to produce...
Topics: DTIC Archive, SCHAFER CORP ARLINGTON VA, *CLOUD PHYSICS, *SCENE GENERATION, METEOROLOGICAL DATA,...
622
622
Jul 9, 2010
07/10
by
YEH Y. M
texts
eye 622
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The Schottky barrier solar cell is considered a possible candidate for converting solar to electrical energy both for space and terrestrial applications. Knowledge of the optical constants of the ultrathin metal film used in the cell is essential for analyzing and designing higher efficiency Schottky barrier cells. The optical constants of 7.5 -nm (75-A) gold films on gallium arsenide have been obtained. In addition, the absolute collection efficiency of Schottky barrier solar cells has been...
Topics: INFRARED ASTRONOMY, METEOROLOGICAL PARAMETERS, CLOUD COVER, ELECTROMAGNETIC NOISE, SKY BRIGHTNESS,...
201
201
Jul 11, 2010
07/10
by
Lutkefeder, N.; Leonard, S. L.; Magid, L. M
texts
eye 201
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The evaluation methodology is outlined for conceptual design and systems analysis on photovoltaic solar energy cells to provide electric power supplies in terrestrial applications at economic costs.
Topics: ATMOSPHERIC RADIATION, CLOUD COVER, DYNAMIC CHARACTERISTICS, STOCHASTIC PROCESSES, ATMOSPHERIC...
292
292
Jun 12, 2011
06/11
by
Prinzel, Lawrence J., III; Kramer, Lynda J.; Arthur, J. J., III; Bailey, Randall E.; Sweeters, Jason L
texts
eye 292
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NASA's Synthetic Vision Systems (SVS) project is developing technologies with practical applications that will help to eliminate low visibility conditions as a causal factor to civil aircraft accidents while replicating the operational benefits of clear day flight operations, regardless of the actual outside visibility condition. The paper describes experimental evaluation of a multi-mode 3-D exocentric synthetic vision navigation display concept for commercial aircraft. Experimental results...
Topics: ATMOSPHERIC MODELS, CLOUD COVER, CLOUD PHYSICS, CONTAMINATION, RADIATIVE TRANSFER, CLOUD HEIGHT...
223
223
Jun 2, 2011
06/11
by
Milanovic, Ivana M.; Zaman, K. B. M. Q
texts
eye 223
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The flow fields of synthetic jets in a cross-flow from orifices of different geometry are investigated. The geometries include a straight, a tapered, a pitched and a cluster of nine orifices, all having the same cross-sectional area through which the perturbation is discharged into the cross-flow. The strength of the jet from the tapered orifice in comparison to that from the straight one is found to be only slightly enhanced. The flow field from the cluster of orifices, when viewed a few...
Topics: EARTH OBSERVING SYSTEM (EOS), ATMOSPHERIC GENERAL CIRCULATION MODELS, CLOUD COVER, ERRORS, VERTICAL...
Early in 2004 the GLOBE Science team suggested a contrail count activity to celebrate Earth Day 2004, which was held this year on April 22nd in the United States and some other countries around the world. The GLOBE contrail team embraced this idea and developed a simplified data collection sheet for this special project. Information about the event was shared through the GLOBE site, UCAR and NASA press releases, the NASA portal (http://www.nasa.gov) and the CERES S'COOL Project...
Topics: NASA Technical Reports Server (NTRS), CONTRAILS, CLOUD COVER, COUNTING, POLLUTION MONITORING,...
The goal of this project is to increase understanding of the modification of the complex atmospheric dynamics and thermodynamics due to the interaction of air, sea, and land in a coastal region. This increased understanding will improve forecasting of coastal weather on a wide spectrum of spatial and temporal scales.
Topics: DTIC Archive, DESERT RESEARCH INST RENO NV, *CLOUD COVER, *DYNAMICS, *THERMODYNAMICS, COASTAL...
Many earth-oriented remote sensing spacecraft and aircraft programs are affected by the presence of clouds. Like aerial photography, they require clear or mostly clear skies. To cope with the cloud problem, the National Weather Service through its Spaceflight Meteorology Group (SMG) of the Space Operations Support Division makes cloud cover forecasts, as part of its specialized weather service for various NASA remote sensing and other programs. Forecasting requirements vary in time from a few...
Topics: NASA Technical Reports Server (NTRS), METEOROLOGY, REMOTE SENSORS, CLOUD COVER, COMPUTERS, WEATHER...
242
242
Jul 26, 2010
07/10
by
Lifshitz, S.; Merhav, S. J.; Grunwald, A. J.; Tucker, G. E.; Tischler, M. B
texts
eye 242
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The utility of helmet-tracked sights to provide pointing commands for teleoperation of cameras, lasers, or antennas in aircraft is degraded by the presence of uncommanded, involuntary heat motion, referred to as biodynamic interference. This interference limits the achievable precision required in pointing tasks. The noise contributions due to biodynamic interference consists of an additive component which is correlated with aircraft vibration and an uncorrelated, nonadditive component,...
Topics: CRITERIA, SOLAR RADIATION, ENVIRONMENT EFFECTS, PHOTOVOLTAIC CELLS, PHOTOVOLTAIC CONVERSION, CLOUD...
257
257
May 30, 2011
05/11
by
Parkinson, Claire L.; Cavalieri, Donald J
texts
eye 257
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Satellite passive-microwave data have been used to calculate sea ice extents over the period 1979-1999 for the north polar sea ice cover as a whole and for each of nine regions. Over this 21-year time period, the trend in yearly average ice extents for the ice cover as a whole is -32,900 /- 6,100 sq km/yr (-2.7 /- 0.5 %/decade), indicating a reduction in sea ice coverage that has decelerated from the earlier reported value of -34,000 /- 8,300 sq km/yr (-2.8 /- 0.7 %/decade) for the period...
Topics: BACKSCATTERING, CLOUD COVER, SEA ICE, THERMODYNAMICS, SURFACE TEMPERATURE, AIR SEA ICE...
Identification of cloud through cloud classification using satellite observations is yet to produce consistent and dependable results. Cloud types are too varied in their geophysical parameters, as measured by satellite remote sensing instruments, to provide for a direct accurate classification. To aid in classification, texture measures are additionally employed. These measures characterize local spectral variations in images. They are widely used for image segmentation, classification, and...
Topics: DTIC Archive, Khazenie, Nahid, NAVAL RESEARCH LAB MONTEREY CA, *PHOTOGRAMMETRY, *CLOUD COVER,...
214
214
May 28, 2011
05/11
by
Smith, David R.; Zewari, Wahid; Lee, Kenneth Y
texts
eye 214
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A comparison of space experiments with previous missions shows a common theme. Some of the recent experiments are based on the scientific fundamentals of instruments of prior years. However, the main distinguishing characteristic is the embodiment of advances in engineering and manufacturing in order to extract clearer and sharper images and extend the limits of measurement. One area of importance to future missions is providing vibration free observation platforms at acceptable costs. It has...
Topics: ATMOSPHERIC GENERAL CIRCULATION MODELS, ATMOSPHERIC RADIATION, RADIATION ABSORPTION, SHORT WAVE...
Examine global cloud climatologies for evidence of human caused changes in cloud cover and their effect on the Earth's heat budget through radiative processes. Quantify climatological changes in global cloud cover and estimate their effect on the Earth's heat budget. Improve our knowledge of global cloud cover and its changes through the merging of several satellite data sets.
Topics: NASA Technical Reports Server (NTRS), CIRRUS CLOUDS, SPACE SURVEILLANCE (SPACEBORNE), HEAT BUDGET,...
Topics: DTIC Archive, TRAVELERS RESEARCH CENTER INC HARTFORD CT, *METEOROLOGICAL DATA, *DATA REDUCTION,...
608
608
May 28, 2011
05/11
by
Atherton, James; Morris, Charles; Settle, Gray; Teal, Marion; Schuerer, Paul; Blair, James; Ryan, Robert; Schutzenhofer, Luk
texts
eye 608
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A primary NASA priority is to reduce the cost and improve the effectiveness of launching payloads into space. As a consequence, significant improvements are being sought in the effectiveness, cost, and schedule of the launch vehicle design process. In order to provide a basis for understanding and improving the current design process, a model has been developed for this complex, interactive process, as reported in the references. This model requires further expansion in some specific design...
Topics: PHOTONS, ALGORITHMS, SCATTERING, RADIATIVE TRANSFER, REMOTE SENSING, WEIGHTING FUNCTIONS, SOLAR...
323
323
May 31, 2011
05/11
by
Pritchett, Amy Ruth; Hansman, R. Joh
texts
eye 323
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Cockpit alerting systems monitor potentially hazardous situations, both inside and outside the aircraft. When a hazard is projected to occur, the alerting system displays alerts and/or command decisions to the pilot. However, pilots have been observed to not conform to alerting system commands by delaying their response or by not following the automatic commands exactly. This non-conformance to the automatic alerting system can reduce its benefit. Therefore, a need exists to understand the...
Topics: CLOUD COVER, PACIFIC OCEAN, SEA SURFACE TEMPERATURE, TROPICAL REGIONS, ALBEDO, LONG WAVE RADIATION,...
This thesis compares RTNEPH and NOGAPS analyses for high, middle, and low clouds during January 1998 and October 1997. We believe that the RTNEPH analyses are reasonably accurate except for in the polar regions and the low clouds. NOGAPS forecasts at 12, 24, 36, and 48h are compared with the appropriate RTNEPH analyses. The difference fields averaged over a month show a rapid increase in the first 12 h over the forecast, followed by a slow growth to 48 h. The rapid increase is caused by model...
Topics: DTIC Archive, Marsteller, Gary E., NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF METEOROLOGY,...
351
351
Jul 10, 2010
07/10
by
GOLIKOV, S. N
texts
eye 351
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DATA SYSTEMIZATION OF TOXICOLOGICAL PATHOPHYSIOLOGY EXOGENIC INTOXICATORS WAS STUDIED USING MODERN CONCEPTS AND MECHANISMS WHICH DEFINE THE ACTION OF VARIOUS POISONS. CHARACTERISTICS, SYMPTOMS, SYNDROMES, TREATMENT, AND PREVENTION WERE CONSIDERED IN ADDITION TO THE EXTREMAL STATES OF SHOCK, COLLAPSE, COMA, AND AGONY.
Topics: MOISTURE CONTENT, RADIO ASTRONOMY, SPACE PROBES, VENUS ATMOSPHERE, ABSORPTION SPECTRA, CARBON...
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222
May 31, 2011
05/11
by
Smith, Leigh M
texts
eye 222
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This paper analyzes the use of Computer Aided Design (CAD) packages at NASA's Marshall Space Flight Center (MSFC). It examines the effectiveness of recent efforts to standardize CAD practices across MSFC engineering activities. An assessment of the roles played by management, designers, analysts, and manufacturers in this initiative will be explored. Finally, solutions are presented for better integration of CAD across MSFC in the future.
Topics: CLIMATOLOGY, INFORMATION THEORY, BAYES THEOREM, CLOUDS (METEOROLOGY), SATELLITE OBSERVATION, CLOUD...
203
203
Jul 21, 2010
07/10
by
Whitlow, W., Jr.; Hafez, M. M.; Osher, S. J
texts
eye 203
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An entropy correction method for the unsteady full potential equation is presented. The unsteady potential equation is modified to account for entropy jumps across shock waves. The conservative form of the modified equation is solved in generalized coordinates using an implicit, approximate factorization method. A flux-biasing differencing method, which generates the proper amounts of artificial viscosity in supersonic regions, is used to discretize the flow equations in space. Comparisons...
Topics: AEROSOLS, SATELLITE IMAGERY, CLOUD COVER, EXTINCTION, OPTICAL DENSITY, REMOTE SENSING,...
Results of thermal-radiation measurements, including thermal energy as a function of time, broad spectral band, field of view, photographic data, and irradiance versus time, are reported for Shots Lacrosse, Cherokee, and Zuni. These data were analyzed to obtain fireball radii versus time, color and power temperatures versus time, and estimated thermal yields. The results are presented together with a brief description of the methods of interpretation used by the authors.
Topics: DTIC Archive, Plum, W, NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA, *NUCLEAR EXPLOSIONS,...
Clear and cloud-free line-of-sight probabilities have been derived from analysis of: (1) Whole-sky photographs, (2) visual sky cover observations, (3) jointly observed sky cover and sunshine, (4) satellite observations and (5) in-flight observations. The most accurate probabilities of cloud-free lines-of- sight through the entire atmosphere can be obtained from a model derived from several thousand whole-sky photographs and visual sky cover observations. The most accurate probabilities of both...
Topics: DTIC Archive, Lund, Iver A, AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA, *ATMOSPHERES,...
428
428
May 31, 2011
05/11
by
Murphy, Patrick C.; Klein, Vladisla
texts
eye 428
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Improved aerodynamic mathematical models, for use in aircraft simulation or flight control design, are required when representing nonlinear unsteady aerodynamics. A key limitation of conventional aerodynamic models is the inability to map frequency and amplitude dependent data into the equations of motion directly. In an effort to obtain a more general formulation of the aerodynamic model, researchers have been led to a parallel requirement for more general testing methods. Testing for a more...
Topics: ALTIMETRY, NORMAL DENSITY FUNCTIONS, CLOUD PHYSICS, LASER ALTIMETERS, SCATTERING, ANTARCTIC...
211
211
Jun 9, 2011
06/11
by
Minnis, Patrick; Nowicki, Greg, et al; Nguyen, Louis; Smith, William, Jr.; Young, David; Khaiyer, Mandana; Palikonda, Rabindra; Spangenberg, Douglas; Doelling, Dave; Phan, Dung
texts
eye 211
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A preliminary new, physically based method for realtime estimation of the probability of icing conditions has been demonstrated using merged GOES-10 and 12 data over the continental United States and southern Canada. The algorithm produces pixel-level cloud and radiation properties as well as an estimate of icing probability with an associated intensity rating Because icing depends on so many different variables, such as aircraft size or air speed, it is not possible to achieve 100% success...
Topics: PERIODIC VARIATIONS, CLOUD PHYSICS, RADIATION MEASUREMENT, CLOUDS (METEOROLOGY), RADIATION...
561
561
May 23, 2011
05/11
by
Jankovsky, Robert S.; Oleson, Steven R
texts
eye 561
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NASA is developing a new monopropellant propulsion system for small, cost-driven spacecraft with AV requirements in the range of 10-150 m/sec. This system is based on a hydroxylammonium nitrate (HAN)/water/fuel monopropellant blend which is extremely dense, environmentally benign, and promises good performance and simplicity. State-of-art (SOA) small spacecraft typically employ either hydrazine or high pressure stored gas. Herein, a 'typical' small satellite bus is used to illustrate how a...
Topics: ATMOSPHERIC MOISTURE, PACIFIC OCEAN, CLOUD COVER, CRITICAL TEMPERATURE, SEA SURFACE TEMPERATURE,...
Surface temperature reduction in terrain denuded of vegetation (as by overgrazing) is postulated to decrease air convection, reducing cloudiness and rainfall probability during weak meteorological disturbances. By reducing land-sea daytime temperature differences, the surface temperature reduction decreases daytime circulation of thermally driven local winds. The described desertification mechanism, even when limited to arid regions, high albedo soils, and weak meteorological disturbances, can...
Topics: NASA Technical Reports Server (NTRS), GRAZING, RAIN, SURFACE COOLING, AIR CURRENTS, CLOUD COVER,...
281
281
May 27, 2011
05/11
by
Parmentier, E. M
texts
eye 281
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Research supported by grant NAGW-1928 has addressed a variety of problems related to planetary evolution. One important focus has been on questions related to the role of chemical buoyancy in planetary evolution with application to both Venus and the Moon. We have developed a model for the evolution of the Moon (Hess and Parmentier, 1995) in which dense, highly radioactive, late stage magma ocean cumulates sink forming a core. This core heats the overlying, chemically layered mantle giving rise...
Topics: SEA SURFACE TEMPERATURE, OCEAN DATA ACQUISITIONS SYSTEMS, GROUND WIND, COMPUTER PROGRAMS,...
A study was made of the statistical prediction of low-cloud amounts and cloudbase heights. Cloud data and other atmospheric parameters over the central and eastern United States were analyzed on a grid mesh of approximately 52 mi (1/4-NWP grid). Predictability of low-cloud amount was evaluated by using the screening regression method and testing the significance of the selected predictors. Predictors considered were low-cloud amount, empirically normalized cloud height, pressure, 850-mb height,...
Topics: DTIC Archive, Pavlowitz, Abraham M, TRAVELERS RESEARCH CENTER INC HARTFORD CT, *CLOUDS, GEOGRAPHY,...
The information in this report was derived empirically from the study of SMS-GOES system satellite imagery and atmospheric data, analyses and progs distributed by the United States National Weather Service. The text provides simple comparisons between satellite observed cloud patterns and the wind field.
Topics: DTIC Archive, Weldon,Roger, AIR WEATHER SERVICE SCOTT AFB IL, *CLOUDS, *METEOROLOGICAL SATELLITES,...
High spatial resolution spectrophotometric observations made in the wavelength region lambda lambda 0.6 - 2.0 micrometers are used to study the Jovian and Saturnian limb darkening. Limb darkening coefficients (k) of the Minnaert function are derived for the cloud layers of both planets. A value of k = 1.0 is found for Jupiter over the entire disk while values of between 0.75 and 0.90 are found for different latitudes for Saturn. These data are used to derive geometric albedoes (G) for the...
Topics: NASA Technical Reports Server (NTRS), JUPITER ATMOSPHERE, LIMB DARKENING, SATURN (PLANET),...
A radiation parameterization for the NASA Goddard climate model was developed, tested, and implemented. Interactive and off-hire experiments with the climate model to determine the limitations of the present parameterization scheme are summarized. The parameterization of Cloud absorption in terms of solar zeith angle, column water vapors about the cloud top, and cloud liquid water content is discussed.
Topics: NASA Technical Reports Server (NTRS), PARAMETERIZATION, RADIATION ABSORPTION, SOLAR RADIATION,...
