Fixed Angle Translunar Guidance Procedures Using Onboard Optical Measurements
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Fixed Angle Translunar Guidance Procedures Using Onboard Optical Measurements
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Author : Harold A. Hamer
language : en
Publisher:
Release Date : 1971
Fixed Angle Translunar Guidance Procedures Using Onboard Optical Measurements written by Harold A. Hamer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Optical measurements categories.
Onboard procedures requiring only simple calculations have been developed for midcourse and approach guidance for translunar trajectories. For midcourse guidance the procedure relies solely on an optical range measurement. The approach-guidance procedure requires a star-to-body measurement and may require a range measurement, depending on the distance to the moon. For both procedures the velocity-correction vector is applied in a fixed inertial direction. In the approach-guidance procedure either one or two guidance maneuvers are applied, depending on the accuracy desired and tile distance to the moon. An error analysis showed that perilune radius can be controlled to a onesigma accuracy of about 30 km.
Fixed Angle Translunar Guidance Procedures Using Onboard Optical Measurements
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Author : Harold A. Hamer
language : en
Publisher:
Release Date : 1971
Fixed Angle Translunar Guidance Procedures Using Onboard Optical Measurements written by Harold A. Hamer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Optical measurements categories.
Onboard procedures requiring only simple calculations have been developed for midcourse and approach guidance for translunar trajectories. For midcourse guidance the procedure relies solely on an optical range measurement. The approach-guidance procedure requires a star-to-body measurement and may require a range measurement, depending on the distance to the moon. For both procedures the velocity-correction vector is applied in a fixed inertial direction. In the approach-guidance procedure either one or two guidance maneuvers are applied, depending on the accuracy desired and tile distance to the moon. An error analysis showed that perilune radius can be controlled to a onesigma accuracy of about 30 km.
An Approach Guidance Method Using A Single Onboard Optical Measurement
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Author : Harold A. Hamer
language : en
Publisher:
Release Date : 1970
An Approach Guidance Method Using A Single Onboard Optical Measurement written by Harold A. Hamer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Approach guidance categories.
An empirical method has been developed for onboard guidance within the sphere of influence of a celestial body. For guidance maneuvers made at a relatively large distance from the body, only one preselected measurement from a star to the body is required. Although the method is designed to control the magnitude of the periapsis radius (or entry angle), the periapsis position and velocity automatically remain close to the nominal values. For lunar approach, error analysis with an assumed one-sigma error of 10 seconds of arc in the optical angular measurements and a one-sigma velocity-cutoff error of 0.2 m/sec has shown that perilune radius can be controlled to a one-sigma accuracy of from 7 to 13 km, depending on the time the approach guidance is performed.
Midcourse Guidance Procedure With Single Position Fix Obtained From Onboard Optical Measurements
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Author : Harold A. Hamer
language : en
Publisher:
Release Date : 1967
Midcourse Guidance Procedure With Single Position Fix Obtained From Onboard Optical Measurements written by Harold A. Hamer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Navigation (Astronautics) categories.
Nasa Technical Note
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Author :
language : en
Publisher:
Release Date : 1971
Nasa Technical Note written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date : 1971
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Government publications categories.
Monthly Catalog Of United States Government Publications Cumulative Index
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1976
Monthly Catalog Of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with United States categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1971
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Aeronautics categories.
Simplified Interplanetary Guidance Procedures Using Onboard Optical Measurements
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Author : Harold A. Hamer
language : en
Publisher:
Release Date : 1972
Simplified Interplanetary Guidance Procedures Using Onboard Optical Measurements written by Harold A. Hamer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Space trajectories categories.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1972
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Mechanics, Applied categories.