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NESC GN&C TDT Workshop on 2D Image Motion Optical Transfer Functions, Pointing Performance Analysis, and RequirementsWhat You Will Learn:
The focus is on payload imaging performance due to pointing motion. Some historical background on pointing performance analysis is given. The Optical Transfer Function (OTF) and Modulation Transfer Function (MTF) are defined. The imaging performance due to pointing motion is measured by image motion optical transfer functions (IM OTF). IM OTFs are defined for displacement, smear, and jitter motions, which are all rigorously defined. Deterministic and Statistical IM OTFs are briefly derived and graphically illustrated and compared. The IM OTFs are parameterized by pointing error metrics(PEM), which are means and covariances of displacement, smear, and jitter. Emphasis is on procedures and algorithms to evaluate the image motion optical transfer functions and pointing error metrics. Three procedures are covered, which depend on whether the pointing error data is from time-domain simulation, frequency-domain analysis, or stochastic modeling. A method to evaluate the relative contribution of disturbance sources and to identify the most significant contributors is presented. The presentation includes pertinent discussion of flexible structures and control-structure interaction. No single book can adequately cover this subject, so a book is not required for the course. A list of selected articles, reports, documents, and books is provided for reference and further study. Mathis kept to the minimum necessary to convey principles; lengthy derivations are left to the reference material. Graphics are used to illustrate concepts. As with any such learning endeavor, the knowledge gained will be retained and strengthened through actual practice.c©2019–2021 Mark E. Pittelkau— 5
Document ID
Acquisition Source
Langley Research Center
Document Type
Mark E. Pittelkau
(Aerospace Control Systems, LLC 35215 Greyfriar Drive Round Hill, VA 20141-2395)
Date Acquired
July 27, 2021
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: NESC Guidance, Navigation, and Control Technical Discipline Team Workshop
Location: Virtual
Country: US
Start Date: August 31, 2021
End Date: September 1, 2021
Sponsors: National Aeronautics and Space Administration
Funding Number(s)
WBS: 869021.
Distribution Limits
Portions of document may include copyright protected material.
Technical Review
Single Expert
NASA Engineering and Safety Center (NESC)
Guidance Navigation and Control (GNC)
Technical Discipline Team (TDT)
2D Inage Motion Optical Transfer Functions
Pointing Performance Analysis and Requirements
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