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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Electrical and electromechanical trigonometric computation assembly and space vehicle guidance system for aligning perpendicular axes of two sets of three-axes coordinate references
Description of device for aligning stacked sheets of paper for repetitive cutting
Optical gauging system for monitoring machine tool alignment
Laser beam projector for continuous, precise alignment between target, laser generator, and astronomical telescope during tracking
Attitude determination and sensor alignment via weighted least squares affine transformations
Auroral oval transverse magnetic disturbance, examined as field aligned current models
Soft galactic X rays role in interstellar grains alignment
Prelaunch automatic azimuth alignment theodolites for Saturn 1B and Saturn 5 space vehicles inertial guidance system, discussing return images separation and error signal generation
Iterative technique using continuous gas laser for alignment of Mach-Zehnder interferometer for monochromatic and white light fringes
Magnetic field aligned currents during 18 March 1969 substorms, observing electric field by Ba plasma cloud motion for magnetic perturbation field
Auroral electron temperature, noting field aligned energy transport current effects
Polar cap magnetic variation mechanism based on electric field aligned continuity of Hall current auroral electrojets, noting ionospheric electron density gradients effects
Misalignment estimation software system /MESS/ for in-flight celestial and inertial reference attitude sensor alignment and calibration on OAO
Sensor system determines absolute alignment of optical axis of experiment package relative to solar vector and provides control information to permit pointing experiment anywhere on solar disc to absolute accuracy of the order of two arc seconds in center and five arc seconds on limb.
Shadowgraph system projects magnified image on screen so that alignment of small electrodes mounted on electrical discharge machines can be corrected and verified. Technique may be adapted to other machine tool equipment where physical contact cannot be made during inspection and access to tool limits conventional runout checking procedures.
Microscopic assembly for alignment of rotary laser focuses on small film area along scan line at oblique angle. Suitable choice of angle and location of optical components project laser beam line as X coordinate reticle. Coordination with horizontal recticle line included microscope facilitates Y coordinate position indexing.
A method is described for determining the measured star vector in LM body coordinates when the measurement data consist of a spiral measurement, a cusor measurement, and a time associated with each measurement. The method is defined from alignment optical telescope (AOT) sightings from the LM on the lunar surface. This formulation will be coded into the real-time computer complex off-line AOT and gravity (AOT+G) bench program, the Gravity-Optics LM Attitude and Position (GOLAP) program.
The onboard navigational and alignment routines used during the nonthrusting phases of an Apollo mission are discussed as to their limitations, and alternate approaches that have more desirable capabilities are presented. A more efficient procedure for solving Kepler's equation, which is used in the calculation of Kepler's problem and Lambert's problem is included, and a sixth-order predictor scheme with a Runge-Kutta starter is recommended for numerical integration. The extension of the rendezvous navigation state to include angle biases and the use of a fixed coordinate system is also evaluated.