Specific SPS construction studies: Operations and maintenance

Surface as well as in-space operations of the solar power satellite program are addressed. The primary end products of SPS industrial enterprise are shown SPS and its ground receiving antenna every six months; and (3) construction of electric cargo orbital transfer vehicles. The production of photovoltaic cells and solar blankets is also considered

Compost Rich of Resistance: Wayfinding in Tel Aviv and Jerusalem

It is not common to travel to a region searching for what is wrong and askew. But this is precisely how I move through greater Palestine-Israel each time I visit. Explosions and incessant pummeling have forced the sidewalks and retaining walls to heave–Styrofoam slabs serve as an equally hasty and hideous shim. But in this, there is hope. Even where the sidewalk momentarily ends–likely that in just a few months a new road, deeper into the West Bank will be built–it is glaring that these foundations are laid at an unsustainable pace. In a land where the forest often obscures the trees, noticing the nuances of demolition and decay have proven integral to my understanding of body-in-place, body-amongst-conflict. In this piece, I describe the embodied experience of encountering the cracks and fissures in Tel Aviv and Jerusalem, and how in these visible, yet nuanced, interstices there is radical potential

Surface current excitation on an inhomogeneously-sheathed plasma immersed cylinder by electromagnetic and electrokinetic waves

Inhomogeneous sheath effect on surface current excitation of immersed plasma cylinder by electromagnetic and electrokinetic wave

On the linearization of Volterra integral equations

Mathematical description of Volterra integral equation

Space station models, mockups and simulators

Schematic outlines for space station models, mockups, and simulators are presented. The types of Boeing models, mockups, and simulators are given along with the classes and characteristics. The use of models in the 767 program is briefly given. Computerized human factors tools are outlined. The use of computer aided design and computer aided manufacturing in the approach for the space station is advocated

The effect of clock, media, and station location errors on Doppler measurement accuracy

Doppler tracking by the Deep Space Network (DSN) is the primary radio metric data type used by navigation to determine the orbit of a spacecraft. The accuracy normally attributed to orbits determined exclusively with Doppler data is about 0.5 microradians in geocentric angle. Recently, the Doppler measurement system has evolved to a high degree of precision primarily because of tracking at X-band frequencies (7.2 to 8.5 GHz). However, the orbit determination system has not been able to fully utilize this improved measurement accuracy because of calibration errors associated with transmission media, the location of tracking stations on the Earth's surface, the orientation of the Earth as an observing platform, and timekeeping. With the introduction of Global Positioning System (GPS) data, it may be possible to remove a significant error associated with the troposphere. In this article, the effect of various calibration errors associated with transmission media, Earth platform parameters, and clocks are examined. With the introduction of GPS calibrations, it is predicted that a Doppler tracking accuracy of 0.05 microradians is achievable