Data obtained with the quadrupole mass spectrometer aboard the Ogo 6 satellite show the effects of significant surface interaction processes, including nearly complete recombination of incoming atomic oxygen on the walls of the instrument antechamber plus adsorption and desorption of oxygen and carbon monoxide. The observed data are fit by solving the time‐dependent continuity equations accounting for production and loss of atomic oxygen, molecular oxygen, and (in the case of mass 28) carbon monoxide. The surface parameters that best fit the data are selected and applied to the determination of ambient densities and their estimated errors.

Inherent in observations of thermospheric winds from the ground with the Fabry-Perot interferometer is the assumption that the measured Doppler shift is a property ofthe source medium viewed by the instrumental line of sight. However, ground based airglow observations in regions of weak airglow emission near large intensity gradients may be contaminated by scattered light. Light from areas where the emission is strong can be scattered by the lower atmosphere into the field of view of the observations. Thermospheric winds deduced from the observed Doppler shifts will then show apparent convergence or divergence with respect to the site of observation. Examples of this effect are found in observations by the Michigan Airglow Observatory station located near the aurora1 zone at Calgary, Alberta. Simulation calculations based upon an experimental model for a significant scattering atmosphere also showed results with either convergence or divergence in the apparent neutral wind field observed by the station.

Thermal and non-thermal O('D) number density profiles are calculated. The two populations are assumed to be coupled by a thermalization cross-section which determines the loss and production in the non-thermal and thermal populations, respectively. The sources, sinks and transport of the two populations are used to model volume emission rate profiles at 63OOA. The 6300 A brightness measured by the Visible Airglow Experiment is then used to establish the presence of the non-thermal population and to determine the thermalization cross-section.

Surface brightnesses at 6300-.& measured by the visible airglow experiment on board the AE-E satellite have been inverted to obtain altitude profiles of volume emission rate. A morphological picture of the emission at low latitudes is developed and qualitatively interpreted in terms of the behavior of electfic fields and neutral winds in the nighttime ionosphere. Global pictures of the emission are presented for solstice and equinox conditions between 1800 and 0400 LT. Observed regions of depleted and enhanced emission are in agreement with the emission pattern expected from the effect of E x B dfifts on the ionization. Other features observed are interpreted in terms of a transequatofial wind and the presence of a pressure maximum near local midnight. These data suggest that the location of the pressure bulge changes seasonally with respect to the goeographic equator. Average bottomside electron density altitude profiles are derived from the 6300-A volume emission profiles. The local time vafiation of the height of the peak electron density deduced from the airglow measurements is in agreement with incoherent scatter measurements made at Arecibo, Puerto Rico, dufing the same time pefiod.

The phase diagram for the binary system indium-tellurium has been clarified and corrected, particularly in the region near the composition InsTes. This material is a potentially important semiconductor, either alone or in combination with other materials, such as CusTe. AgsTe, CdTe, etc. Results of this study were obtained by correlating differential thermal analysis (DTA), chemical analyses of zone-refined ingots, microscopic analysis, and X-ray determinations. Two new phases have been identified, and the compositions of three other phases have been determined more precisely. (1) The phase InsTe (33.3 at. %Te) does not exist; the composition should be InsTe7 (43 at. %Te). The peritectic decomposition temperature is 462°C. (2) The phase InTe (50.0 at. oA Te) has the composition InsoTesr (50.8 at. 'A Te). The congruent melting point is 696°C. (3) A new phase InsTed (57.0 at. 'A Te) has been found having a peritectic decomposition temperature of 650°C. (4) The phase InaTes (60.0 at. o/o Te) has the composition InwTe4a (59.7 at. ok Te). The congruent melting point is 667"C, and there is a phase transition at about 550°C. (5) A new phase InsTea (62.5 at. 'A Te) has been found, having a peritectic decomposition temperature of 625"C, and a phase transition at 463°C. (6) The phase InsTeg (71.5 at. % Te) was prepared. (7) Electrical measurements on InsTeg show a large conductivity increase associated with the phase transition at 463°C. (8) Electrical measurements on zone refined InsTes, were non-reproducible.