Evaluation of SIR-A space radar for geologic interpretation: United States, Panama, Colombia, and New Guinea

Comparisons between LANDSAT MSS imagery, and aircraft and space radar imagery from different geologic environments in the United States, Panama, Colombia, and New Guinea demonstrate the interdependence of radar system geometry and terrain configuration for optimum retrieval of geologic information. Illustrations suggest that in the case of space radars (SIR-A in particular), the ability to acquire multiple look-angle/look-direction radar images of a given area is more valuable for landform mapping than further improvements in spatial resolution. Radar look-angle is concluded to be one of the most important system parameters of a space radar designed to be used for geologic reconnaissance mapping. The optimum set of system parameters must be determined for imaging different classes of landform features and tailoring the look-angle to local topography

Land use change detection with LANDSAT-2 data for monitoring and predicting regional water quality degradation

The author has identified the following significant results. Comparison between LANDSAT 1 and 2 imagery of Arkansas provided evidence of significant land use changes during the 1972-75 time period. Analysis of Arkansas historical water quality information has shown conclusively that whereas point source pollution generally can be detected by use of water quality data collected by state and federal agencies, sampling methodologies for nonpoint source contamination attributable to surface runoff are totally inadequate. The expensive undertaking of monitoring all nonpoint sources for numerous watersheds can be lessened by implementing LANDSAT change detection analyses

Evaluation of aircraft microwave data for locating zones for well stimulation and enhanced gas recovery

Imaging radar was evaluated as an adjunct to conventional petroleum exploration techniques, especially linear mapping. Linear features were mapped from several remote sensor data sources including stereo photography, enhanced LANDSAT imagery, SLAR radar imagery, enhanced SAR radar imagery, and SAR radar/LANDSAT combinations. Linear feature maps were compared with surface joint data, subsurface and geophysical data, and gas production in the Arkansas part of the Arkoma basin. The best LANDSAT enhanced product for linear detection was found to be a winter scene, band 7, uniform distribution stretch. Of the individual SAR data products, the VH (cross polarized) SAR radar mosaic provides for detection of most linears; however, none of the SAR enhancements is significantly better than the others. Radar/LANDSAT merges may provide better linear detection than a single sensor mapping mode, but because of operator variability, the results are inconclusive. Radar/LANDSAT combinations appear promising as an optimum linear mapping technique, if the advantages and disadvantages of each remote sensor are considered

Winds of Planet Hosting Stars

The field of exoplanetary science is one of the most rapidly growing areas of astrophysical research. As more planets are discovered around other stars, new techniques have been developed that have allowed astronomers to begin to characterise them. Two of the most important factors in understanding the evolution of these planets, and potentially determining whether they are habitable, are the behaviour of the winds of the host star and the way in which they interact with the planet. The purpose of this project is to reconstruct the magnetic fields of planet hosting stars from spectropolarimetric observations, and to use these magnetic field maps to inform simulations of the stellar winds in those systems using the Block Adaptive Tree Solar-wind Roe Upwind Scheme (BATS-R-US) code. The BATS-R-US code was originally written to investigate the behaviour of the Solar wind, and so has been altered to be used in the context of other stellar systems. These simulations will give information about the velocity, pressure and density of the wind outward from the host star. They will also allow us to determine what influence the winds will have on the space weather environment of the planet. This paper presents the preliminary results of these simulations for the star $\tau$ Bo\"otis, using a newly reconstructed magnetic field map based on previously published observations. These simulations show interesting structures in the wind velocity around the star, consistent with the complex topology of its magnetic field.Comment: 8 pages, 2 figures, accepted for publication in the peer-reviewed proceedings of the 14th Australian Space Research Conference, held at the University of South Australia, 29th September - 1st October 201

Artifacts and pheromone blends from Nezara spp.and other stink bugs (Heteroptera: Pentatomidae).

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Falling into LINE: school strategies for overcoming challenges associated with learning in natural environments (LINE)

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Note and Comment

Power of the US Supreme Court to Enforce Judgments Against States - In the year 1460, when the perogatives of sovereignty or at least of the Crown were asserted in England much more vigorously than they are today, the Counseill of the right high and mighty Prynce Richard Duc of York, brought into the Parliament Chambre a writyng conteignyng the clayme and title of the right, that the seid Duc pretended unto the Corones of Englond and of Fraunce, and Lordship of Trelond, and the same writyng delyvered to the Right Reverent Fader in God George Bishop of Excestre, Chaunceller of Englond, desiryng hym that the same writyng myght be opened to the Lordes Spirituelx and Temporelx assembled in this present Parlement, and that the seid Duc myght have brief and expedient answere thereof. Whereupon the lords, apparently embarrassed by this extraordinary manifestation of confidence in them, declared that the said writyng shuld be radde and herd, not to be answered without the Kyngs commaundement, for so moche as the mater is so high, and of soo grete wyght and poyse.\u27 Vhen four days later the petition was again urgently presented therupon incontynent all the seid Lordes Spirituelx and Temporelx went to the Kyngs high presence, and therunto opened and declared the seid mater, by the mouth of his said Chaunceller of Englond. The King was graciously pleased to command the lords that they should serche for to fynde in asmuch as in them was, all such thyngs as myght be objecte and leyde ayenst the cleyme and title of the seid Duc. And though the King\u27s command could scarcely be regarded as indicating a judicial inquiry, the lords in their extremity sent for the Kyngs Justices into the Parlement Chambre, to have their avis and Counsell in this behalf, * * * * sadly to take avisament therin, and to serche and fynde all such objections as myght be leyde ayenst the same, in fortefying of the Kynges right. Duke of York\u27s Claim to the Crown, 5 Rot. ParI., 375, I Wambaugh\u27s Cas. Const. Law, I

Electron Density Dropout Near Enceladus in the Context of Water-Vapor and Water-Ice

On 12 March 2008, the Cassini spacecraft made a close encounter with the Saturnian moon Enceladus, passing within 52 km of the moon. The spacecraft trajectory was intentionally-oriented in a southerly direction to create a close alignment with the intense water-dominated plumes emitted from the south polar region. During the passage, the Cassini Radio and Plasma Wave System (RPWS) detected two distinct radio signatures: 1) Impulses associated with small water-ice dust grain impacts and 2) an upper hybrid (UH) resonance emission that both intensified and displayed a sharp frequency decrease in the near-vicinity of the moon. The frequency decrease of the UH emission is associated with an unexpectedly sharp decrease in electron density from approximately 90 el/cubic cm to below 20 el/cubic cm that occurs on a time scale of a minute near the closest encounter with the moon. In this work, we consider a number of scenarios to explain this sharp electron dropout, but surmise that electron absorption by ice grains is the most likely process