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  • Other Sources  (27)
  • METEOROLOGY AND CLIMATOLOGY  (20)
  • SPACECRAFT DESIGN, TESTING AND PERFORMANCE  (7)
  • 1985-1989  (27)
  • 1
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    Develop a plan for establishing global aerosol backscatter coefficient data base (1985)
    In:  CASI
    Details
    Publication Date: 2004-12-04
    Description: A potential improvement on measuring atmospheric winds by using a coherent Doppler system has led to a need for detailed knowledge concerning the aerosol backscattering characteristics, especially at CO2 wavelengths. In order to meet this requirement, a plan of study has been developed to establish a global data base of atmospheric aerosol backscattering coefficients.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center, Proceedings of the NASA Symposium on Global Wind Measurements; p 243-246
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Mesoscale spiral vortex embedded within a Lake Michigan snow squall band - High resolution satellite observations and numerical model simulations (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: It is known that Great Lakes snow squall convection occurs in a variety of different modes depending on various factors such as air-water temperature contrast, boundary-layer wind shear, and geostrophic wind direction. An exceptional and often neglected source of data for mesoscale cloud studies is the ultrahigh resolution multispectral data produced by Landsat satellites. On October 19, 1972, a clearly defined spiral vortex was noted in a Landsat-1 image near the southern end of Lake Michigan during an exceptionally early cold air outbreak over a still very warm lake. In a numerical simulation using a three-dimensional Eulerian hydrostatic primitive equation mesoscale model with an initially uniform wind field, a definite analog to the observed vortex was generated. This suggests that intense surface heating can be a principal cause in the development of a low-level mesoscale vortex.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review (ISSN 0027-0644); 116; 1374-138
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Space truss assembly using teleoperated manipulators (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Teleoperator experiments were conducted which have demonstrated that a realistic, complex task, typical of those accomplished on-orbit by EVA astronauts, can be done in a smooth, timely manner with manipulators remotely controlled by humans. The real concerns were: (1) do manipulators have sufficient dexterity for these tasks, (2) can sufficient information from the remote site be provided to permit adequate teleoperator control, (3) can reasonable times relative to EVA times be achieved, (4) can the task be completed without frequent and/or damaging impacts among the task components and the manipulators? Positive answers were found to all of these concerns. Tasks times, operator fatigue, and smoothness of operation could be improved by designing the task components and the manipulators for greater compatibility. The data recorded supplements a data base of performance metrics for the same task done in the water immersion training facility as well as space flight and provides management with an objective basis for deciding how and where to apply manipulators in space.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA, Goddard Space Flight Center, Proceedings of 1987 Goddard Conference on Space Applications of Artificial Intelligence (AI) and Robotics; 18 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Low level remote sensing: Orographic winds (1989)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The orographic flow data set was obtained from a flight program to measure the influence of orographic features on turbulence momentum, heat, and moisture fluxes. The NASA B-57 aircraft instrumented with probes for measuring the three fluctuating wind speed components, temperature, and humidity was the primary measuring vehicle. Ancillary measurements were made with several ground-based sensors. These include the NOAA radar wind profilers, the Boulder wind network, the PROFS mesoscale surface network, the Boulder Atmospheric Observatory 300 m tower, special rawinsonde observations, and the NOAA/WPL Doppler lidar. The major objective of the flight program was to provide planetary boundary layer parameter information for new and current general circulation computer models. A numerical code, WINDER, based on a discrete element technique was run to numerically model the water tunnel simulated flow. Comparison of the analytical model with the experimental results is very good. Physical fluid dynamic principles embedded in the computational model and visual and hot wire anemometer measurements from the simulation are being rationalized to develop a physical understanding of the vortex flow. The results will be interpreted as they pertain to full scale atmospheric flows.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA, Marshall Space Flight Center, NASA(MSFC FY88 Global Scale Atmospheric Processes Research Program Review; p 27-28
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Results of the ACCESS experiment (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: All basic EVA space construction tasks included in the experiment were accomplished on-orbit successfully, and the construction task time shows good correlation with neutral buoyancy data. However, the flight assembly times were slightly longer than the best times obtained in the water tank. This result was attributed by the EVA astronauts to the new, tighter tolerance truss hardware used on-orbit as opposed to the well-worn training hardware used in the neutral buoyancy and was, thus, not a space related phenomenon. The baseline experiment demonstrated that erectable structure can be assembled effectively by astronauts in EVA. The success of ACCESS confirmed the feasibility of EVA space assembly of erectable trusses and played a role in the decision to baseline the Space Station as a 5 meter erectable structure.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Space Construction; p 183-198
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Turbulence models (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The subject of modeling turbulence for use with the JAWS wind shear data sets is addressed. The present FAA AC 120-41 wind shear models are quasisteady wind models. FAA recommends superimposing upon these winds a Dryden spectrum model of turbulence. For the JAWS data, it must be decided whether this approach is adequate or whether turbulence must be analyzed and modeled differently. This question is discussed in detail.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Langley Research Center Wind Shear(Turbulence Inputs to Flight Simulation and Systems Certification; p 125-151
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Remote versus in situ turbulence measurements (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Comparisons of in situ wind and turbulence measurements made with the NASA B-57 instrumented aircraft and those remotely made with both radar and lidar systems are presented. Turbulence measurements with a lidar or radar system as compared with those from an aircraft are the principal themes. However, some discussion of mean wind speed and direction measurements is presented. First, the principle of measuring turbulence with Doppler lidar and radar is briefly and conceptually described. The comparisons with aircraft measurements are then discussed. Two studies in particular are addressed: one uses the JAWS Doppler radar data and the other uses data gathered both with the NASA Marshall Space Flight Center and the the NOAA Wave Propagation Lab. gound based lidars. Finally, some conclusions and recommendations are made.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Langley Research Center Atmospheric Turbulence Relative to Aviation, Missile and Space Programs; p 53-71
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    NASA TECHNICAL REPORTS
  • 8
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    Calibration of the spin-scan ozone imager aboard the dynamics Explorer 1 satellite (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The calibration technique, which contains the calibrated backscattered radiance values necessary for performing the calibrations, is presented. The calibration constants for September to October 1981 to determine total columnar ozone from the Spin-Scan Ozone Imager (SOI), which is a part of the auroral imaging instrumentation aboard the Dynamics Explorer 1 Satellite, are provided. The precision of the SOI-derived total columnar ozone is estimated to be better than 2.4 percent. Linear regression analysis was used to calculate correlation coefficients between total columnar ozone obtained from Dobson ground stations and SOI which indicate that the SOI total columnar ozone determination is equally accurate for clear or cloudy weather conditions.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TP-2723 , L-16150 , NAS 1.60:2723
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Atmospheric Turbulence Relative to Aviation, Missile, and Space Programs (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The purpose of the workshop was to bring together various disciplines of the aviation, missile, and space programs involved in predicting, measuring, modeling, and understanding the processes of atmospheric turbulence. Working committees re-examined the current state of knowledge, identified present and future needs, and documented and prioritized integrated and cooperative research programs.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-CP-2468 , L-16296 , NAS 1.55:2468
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Density uncertainty effect on cost of space station reboost (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: If the space station is designed for operation in a nominal atmosphere for ten years and the atmosphere is two-sigma higher than nominal during the entire ten year period, the impact would be an additional cost of $70.1 million, based on a resupply cost of $3200/lb. A cost analysis of the space station fuel consumption with reboost is presented.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Marshall Space Flight Center Upper and Middle Atmospheric Density Modeling Requirements for Spacecraft Design and Operations; p 39-40
    Format: text
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