Statistical Forecasting of Ionospheric Weather
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Weather Statistical Forecasting↗
Engineering topics
Wilson, B.
Publications and source records attributed to Wilson, B..
Advanced Microwave Radiometry and Scattorometry Approaches for Surface Hydrology
In this study we have examined techniques and technology options for achieving desired microwave system performance (high spatial resolution and accuracy) using low-mass deployable antennas.
Microwave radiometry Scatterometry Hydrology Ocean↗
Global Ionospheric TEC Variations During January 10, 1997 Storm
The ionospheric storm evolution process was monitored during the January 10, 1997 magnetic cloud event, through measurements of the inonospheric total electron content (TEC) from 150 GPS stations. The first significant response of the inonospheric TEC to the geomagnetic storm was at 0300 UT as an auroral/subauroral enhancement around the Alaskan evening sector.
Global Ionospheric TEC ionospheric storm magnetic ↗
A Comparative Study of the Ionospheric TEC Measurements Using Global Ionospheric Maps of GPS, TOPEX Radar and the Bent Model
Global ionospheric mapping (GIM) is a new, emerging technique for determining global ionospheric TEC (total electron content) based on measurements from a worldwide network of Global Positioning System (GPS) receivers.
altimeter bent model↗
IC 1257: A New Globular Cluster in the Galactic Halo
New CCD photometry of the faint, compact star cluster IC 1257 (L = 17? = +/- 15?obtained with the Palomar 5m telescope, reveals that it is a highly reddened globular cluster well beyond the Galactic center.
ccd photometry stars clusters star cluster globula↗
Overview of the space environmental effects observed on the retrieved Long Duration Exposure Facility (LDEF)
The Long Duration Exposure Facility (LDEF), which encompassed 57 experiments with more than 10,000 test specimens, spent 69 months in Low Earth Orbit (LEO) before it was retrieved by the Space Shuttle in January 1990. Hundreds of LDEF investigators, after studying for over two years these retrieved test specimens and the onboard recorded data and systems hardware, have generated a unique first-hand view of the long-term synergistic effects that the LEO environment can have on spacecraft. These studies have also contributed significantly toward more accurate models of the LEO radiation, meteoroid, manmade debris and atomic oxygen environments. This paper provides an overview of some of the many LDEF observations and the implications these can have on future spacecraft such as Space Station Freedom.
Kinard, W.↗
Extracting Ionospheric Measurements from GPS in the Presence of Anti-Spoofing
Line-of-sight ionospheric measurements derived from differencing dual-frequency Global Positioning System (GPS) pseudorange data are corrupted by instrumental biases in both the receiver and GPS satellite transmitters due to hardware delays in the L1 and L2 signal paths.
Global↗
Space shuttle flight (STS-45) of L8 myoblast cells results in the isolation of a nonfusing cell line variant
Myoblast cell cultures have been widely employed in conventional (1g) studies of biological processes because characteristics of intact muscle can be readily observed in these cultured cells. We decided to investigate the effects of spaceflight on muscle by utilizing a well characterized myoblast cell line (L8 rat myoblasts) as cultured in the recently designed Space Tissue Loss Flight Module "A" (STL-A). The STL-A is a "state of the art," compact, fully contained, automated cell culture apparatus which replaces a single mid-deck locker on the Space Shuttle. The L8 cells were successfully flown in the STL-A on the Space Shuttle STS-45 mission. Upon return to earth, reculturing of these spaceflown L8 cells (L8SF) resulted in their unexpected failure to fuse and differentiate into myotubes. This inability of the L8SF cells to fuse was found to be a permanent phenotypic alteration. Scanning electron microscopic examination of L8SF cells growing at 1g on fibronectin-coated polypropylene fibers exhibited a strikingly different morphology as compared to control cells. In addition to their failure to fuse into myotubes, L8SF cells also piled up on top of each other. When assayed in fusion-promoting soft agar, L8SF cells gave rise to substantially more and larger colonies than did either preflight (L8AT) or ground control (L8GC) cells. All data to this point indicate that flying L8 rat myoblasts on the Space Shuttle for a duration of 7-10 d at subconfluent densities results in several permanent phenotypic alterations in these cells.
STS-45 Shuttle Project↗
Proton Irradiation Effects on Strained Si1-Gex/Si Heterostructures
This paper reports the results of a study of proton irradiation effects on heterostructures.
proton irradiation↗
Future Infrared Detector Needs for Space Astronomy
At a recent workshop, a panel of users and technologists worked to assess the state-of-the-art of relevant approaches in the area of direct infrared detectors.
infrared↗
NASA biomedical applications team. Applications of aerospace technology in biology and medicine
The use of a bipolar donor-recipient model of medical technology transfer is presented. That methodology is designed to: (1) identify medical problems and aerospace technology that in combination constitute opportunities for successful medical products; (2) obtain the early participation of industry in the transfer process; and (3) obtain acceptance by the medical community of new medical products based on aerospace technology. Problem descriptions and activity reports and the results of a market study on the tissue freezing device are presented.
Rouse, D. J.↗