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Author: Robert J. Naumann Publisher: ISBN: Category : Space vehicles Languages : en Pages : 52
Book Description
Several series of tests were conducted to establish the ballistic limit for the various Pegasus and Explorer XXIII detector panels. In these tests extremely small, carefully sized beads were launched in a velocity range that included the perforation threshold. By varying the size, a ballistic limit curve was established on a mass-velocity plot. Such curves were then extrapolated to average meteor velocity to obtain the characteristic mass for each sensor. Additional tests were conducted on the Pegasus panels using the Pegasus test tool, which contains the identical electronic circuitry used by the flight models. These tests included hot and cold tests, thermal cycling after impact, oblique impacts, etc. Several types of anomalous events noted in the operation of the spacecraft could be simulated in this manner. Some indication of the dependence of detection threshold upon size was obtained, and the implications of these tests in the analysis of the results will be discussed.
Author: Robert J. Naumann Publisher: ISBN: Category : Space vehicles Languages : en Pages : 52
Book Description
Several series of tests were conducted to establish the ballistic limit for the various Pegasus and Explorer XXIII detector panels. In these tests extremely small, carefully sized beads were launched in a velocity range that included the perforation threshold. By varying the size, a ballistic limit curve was established on a mass-velocity plot. Such curves were then extrapolated to average meteor velocity to obtain the characteristic mass for each sensor. Additional tests were conducted on the Pegasus panels using the Pegasus test tool, which contains the identical electronic circuitry used by the flight models. These tests included hot and cold tests, thermal cycling after impact, oblique impacts, etc. Several types of anomalous events noted in the operation of the spacecraft could be simulated in this manner. Some indication of the dependence of detection threshold upon size was obtained, and the implications of these tests in the analysis of the results will be discussed.
Author: Eberhard Grün Publisher: Springer Science & Business Media ISBN: 3642564283 Category : Science Languages : en Pages : 824
Book Description
An excellent handbook on the physics of interplanetary dust, a topic of interest not only to astronomers and space scientists but also to engineers. The following topics are covered in the book: historical perspectives; cometary dust; near-Earth environment; meteoroids and meteors; properties of interplanetary dust, information from collected samples; in situ measurements of cosmic dust; numerical modeling of the Zodiacal Cloud structure; synthesis of observations; instrumentation; physical processes; optical properties of interplanetary dust; orbital evolution of interplanetary dust; circumplanetary dust, observations and simple physics; interstellar dust and circumstellar dust disks. No doubt, the text will be regarded as the standard reference on interplanetary dust for many years to come.
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division Publisher: ISBN: Category : Aeronautics Languages : en Pages : 966
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Publisher: ISBN: Category : Aeronautics Languages : en Pages : 962
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Publisher: ISBN: Category : Science Languages : en Pages : 956
Author: Robert J. Naumann
Author: Robert J. Naumann
Author: Eberhard Grün
Author: 
Author: United States. Superintendent of Documents
Author: United States. Superintendent of Documents
Author: United States. National Aeronautics and Space Administration
Author: 
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division