A Study of Effects of the Gas-Surface Interaction on Spinning Convex Bodies With Application to Satellite Experiments

Karr, Gerald R.

doi:10.21236/ad0695522

Cited by 5 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Karr [1969] When data from a satellite which is not specifically designed for aerodynamic measurements are used, it is necessary to assume a model of gas-surface interaction. Of a number of excellent models available [Schamberg, 1959;Nocilla, 1963;Karr, 1969] we have found it convenient to use Schamberg's. This model was used to infer drag and accommodation coefficients from the paddle wheel satellite Explorer 6 [Moe, 1966].…”

Section: Introductionmentioning

confidence: 99%

On fundamental problems in the deduction of atmospheric densities from satellite drag

Imbro¹,

Moe²,

Moe³

1975

J. Geophys. Res

View full text Add to dashboard Cite

The largest source of error in the deduction of atmospheric densities from orbital data stems from uncertainty in our knowledge of the interaction of atmospheric molecules with satellite surfaces. A method of determining two of the important parameters, the accommodation and drag coefficients, is developed in detail. As an example, the method is applied to observational data from the paddle wheel satellite Ariel 2. Because of the importance of spherical sateilk{es the drag coefficient for a sphere under the conditions of Ariel 2 ( a moderately eccentric orbit with perigee near 300 km) is also obtained. The importance of well-designed orbital experiments to improve our knowledge of surface-particle interactions at a variety of altitudes is stressed.2 and derived an accommodation coefficient from observa-parameters and surface conditions. The Schamberg model was developed to describe the interaction of artificial satellites with the upper atmosphere. The appropriate aerodynamic regime is 'free molecular' flow; i.e., the effects on the satellite can be deduced by considering only 3077

show abstract

Section: Introductionmentioning

confidence: 99%

On fundamental problems in the deduction of atmospheric densities from satellite drag

Imbro¹,

Moe²,

Moe³

1975

J. Geophys. Res

View full text Add to dashboard Cite

show abstract

“…These were the first measurements of absolute thermospheric densities. An independent analysis of the Explorer 6 measurements by Gerald Karr confirmed the usefulness of paddlewheel satellite measurements [30]. Karr used a model of gas-surface interaction that he himself had developed.…”

Section: Drag Coefficientsmentioning

confidence: 81%

“…In the late 1960s a new method of separating the air density from the drag coefficient became available, with the analysis of the spin decay and orbital decay of paddlewheel satellites [29][30][31][32]. This method made use of the unpublished theoretical analysis of the spin decay of the first paddlewheel satellite, Explorer 6, which was performed by Leon and Reiter in 1959, before the satellite was launched.…”

Section: Drag Coefficientsmentioning

confidence: 99%

Gas-Surface Interactions in Low-Earth Orbit

Moe

2011

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. When the space age began, some aerodynamicists expected that the surfaces of spacecraft would be cleaned by desorption in the high vacuum of space; while others, familiar with experiments on engineering surfaces, believed that satellite surfaces would be contaminated. During subsequent decades, satellite evidence has accumulated, showing that surfaces in low-Earth orbit are contaminated by adsorbed atomic oxygen and its reaction products. These contaminants cause accommodation coefficients to be high, and the angular distribution of reemitted molecules to be nearly diffuse. These surface conditions must be considered in calculating satellite drag coefficients in free-molecular flow. We describe the experimental and theoretical developments which have led to these conclusions.

show abstract

An Evaluation of Jacchia 71 and MSIS90 Atmosphere Models with NASA ODERACS Decay Data

et al. 1997

View full text Add to dashboard Cite

A Study of Effects of the Gas-Surface Interaction on Spinning Convex Bodies With Application to Satellite Experiments

Cited by 5 publications

References 4 publications

On fundamental problems in the deduction of atmospheric densities from satellite drag

On fundamental problems in the deduction of atmospheric densities from satellite drag

Gas-Surface Interactions in Low-Earth Orbit

An Evaluation of Jacchia 71 and MSIS90 Atmosphere Models with NASA ODERACS Decay Data

Contact Info

Product

Resources

About