SPOT satellite

Fig. 6.83. Forest coverage map for southern Sweden, processed from LANDSAT and SPOT satellite imagery. A magnification of the great laJces area is included. Forest pixels are dark in the pictures (Courtesy Swedish Space Corporation)...

Beryllium is used as an alloying agent in producing beryllium copper, which is extensively used for springs, electrical contacts, spot-welding electrodes, and non-sparking tools. It is applied as a structural material for high-speed aircraft, missiles, spacecraft, and communication satellites. Other uses include windshield frame, brake discs, support beams, and other structural components of the space shuttle. 

From LEED measurements of H monolayers adsorbed on Fe(110) Imbihl et al. proposed a phase diagram as shown in Fig. IS. In addition to lattice gas and lattice fluid phases, two commensurate ordered phases were identifled, denoted as (2 x 1) and (3 x 1) in the figure (cf. Fig. 16). The shaded regions are interpreted as incommensurate phases or as phases composed of antiphase domains their signature is that the LEED spot does not occur at the Bragg position but rather the peak is splitted and satellites appear (Fig. 17). 

From there we then concluded that if IR records from satellites which were able to follow the movements of herds of elephants would show spots with good food that they avoid, then the presence of mines or arms catches should be checked for. 

The existence of a superstructure was revealed by satellite spots in the XRD single crystal diffraction pattern of partly dehydrated goethite. The superstructure was considered to be an in-... 

Figure 31 BiPbSr2YCusOfi Several types of satellites are observed in different areas of the same crystals ([001]) (a) satellites set up along a direction roughly parallel to [120] (q-6.25) (b) bidimens-ional system of satellites resulting from the existence of misori-ented areas and double diffraction phenomena, the angle between both systems is close to 100 (c) satellites along [110] with q 3.65 (d) previous satellites have disappeared but streaks remain along (II0 (e) multisplitting of the spots and first satellites they are indications of distortions and microtwins.

Figure 32 (a) Examples of satellites observed in [0011 E D. patterns of PbBaYSrCuaO, [3,1] phase (b) the extra spots are dearly visible when the zone is slightly deviated from the exact orientation (c) schematic representation of the pattern, two sets of satellites are visible they are characteristic of 90" oriented domains basic spots at level 1/2 are represented as open circles, systems 1 and 2 (4 x dii()),. systems 3 and 4 (6 x d110). 

Experimentally the PD may be studied by diffuse X-ray scattering (DXS) experiments in which the ID distortion of the chains gives rise to weak continuous lines on either side of the layer lines of strong Bragg spots.10 The periodicity of the PD may be determined from the position of the diffuse line. In contrast, 3D superstructures give rise to real satellite reflections associated with the Bragg spots. 

A characteristic feature of these partially oxidized bis(oxalato)platinate salts of divalent cations is the coexistence of two modulations of the lattice over a wide temperature range (a) a one-dimensional modulation, as detected by the appearance of diffuse lines on X-ray films, perpendicular to the [Pt(C204)2] anion stacking direction and surrounding the even Bragg reflection layer lines of non-zero order (b) a three-dimensional modulation which gives rise to a complicated pattern of fine satellite spots in the neighbourhood of every reciprocal layer line. 

NiOP already exists in the Pccn group at room temperature and weak diffuse X-ray scattering and kF and 2kF satellite reflections are observed.79 The 2kF spots disappear above 305 K and the conductivity is similar to that observed for CoOP and ZnOP.79,72... 

Fig. 15 a-e. LAED patterns from crazes produced in PS samples deformed at a 23 °C, b 34 °C, c 51 °C, d 61 °C, and e 71 °C. A Lorentzian background was subtracted from each image to enhance the satellite diffraction spots. (From Ref. courtesy P. Miller)... 

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