Region rocket

Beynon, W.J.G., E.R. Wilhams, F. Arnold, D. Krankowsky, W.C. Bain, and P.H.G. Dickinson, D-region rocket measurements in winter anomaly absorption conditions. Nature 261, 118, 1976. 

Injection of species into the stratosphere associated with these launches includes emissions not only from the rocket exhaust but also from ablation of the solid rocket motors, the paint on the outer hulls, and hardware from satellites and discarded portions of rockets in the atmosphere (Zolensky et al., 1989). The increase in launches of such vehicles has led to a significant increase in particles associated with solid rocket use. Figure 12.10, for example, shows the concentration of large (>l-/xm diameter) solid stratospheric particles in the 17- to 19-km altitude region from 1976 to 1984,... 

The main component of a modem liquid-propellant rocket thrust-chamber assembly is called the coolant jacket. There are many jacket designs but, in nearly all cases, the jacket structure extends thru the throat region as well as the combustion chamber Ref J.W. Herrick E. Burgess, Rocket Encyclopedia Illustrated , Aero Publ, Los Angeles, Calif (1959), p 240... 

In rocketry, the term means the consumption of a solid proplnt chge in a rocket thrust chamber in a manner that results in a gradually decreasing gas pressure at the region of the nozzle approach (Ref 3)... 

Rocketborne Field-Widened Interferometer-Spectrometer. The rocket-borne field-widened interferometer-spectrometer (RBFWI) is an example of an instrument that uses emission techniques to make broad-band spectral measurements in the 2 - 7.5 pm spectral region in the upper atmosphere. Figure 10 illustrates the concept of this cryogenically-cooled instrument developed at Utah State University under an Air Force Geophysics Laboratory contract. 

In Example 2.26, we have obtained the linear regression model for dynamic viscosity y, P, as a function of mixing speed X3, min"1 and mixing time X2, min of composite rocket propellant. To determine the conditions of minimal viscosity, a method of steepest ascent has been applied. This method has defined the local optimum region that has to be described by a second-order model. Conditions of the factor variations are shown in Table 2.146. 

Similar to RCRA, once the trial plan has been approved, a trial burn will be conducted and the results reported to the regional administrator or the director, National Program Chemical Division, for approval. At TOCDF, trial burns were conducted in accordance with RCRA and TSCA protocols for certain M55 rockets. The acceptance criteria for the RCRA trial burn of the liquid incinerators, the deactivation furnace system (DFS), and the metal parts furnace were met. A second test of the DFS destruction efficiency for PCBs showed that emissions levels meet TSCA criteria (NRC, 1999). 

Most recently, in 1984, detailed ion composition measurements could for the first time be performed in the stratopause region by our group [31], using a newly designed parachute-borne dropsonde mass spectrometer payload, which is carried by a rocket up to 60 km altitude and subsequently separated from the rocket motor. Positive and negative ion composition data could be obtained between about 30 and 60 km altitude. Thus, the gap between the regions covered by conventional rocket (above about 60 km) and balloon measurements (below 45-40 km) could be closed. 

In the 1920s, G.M.B. Dobson began measuring the amount of ozone in the atmosphere. Although ozone is formed in the higher regions of the stratosphere, most of it is stored in the lower stratosphere, where it can be measured by instruments on the ground or in balloons, satellites, and rockets. Dobson measured levels of stratospheric ozone of more than 300 Dobson units (DU). His measurements serve as a basis for comparison with recent measurements. 

---