Results 81 to 90 of about 547,647 (206)

In-flight calibration of the high-gain antenna pointing for the Mariner Venus-Mercury 1973 spacecraft [PDF]

The methods used to in-flight calibrate the pointing direction of the Mariner Venus-Mercury 1973 spacecraft high gain antenna and the achieved antenna pointing accuracy are described.
Hardman, J. M., Havens, W. F., Ohtakay, H.   +2 more
core   +1 more source

The Influence of Imagery Training Methods on Pointing Accuracy Results in Petanque Athletes

Champions
The aim of this study is to know the influence of imagery training methods on the accuracy pointing results on petanque athletes STKIP Taman Siswa Bima.
Abdullah Abdullah, Samsudin Samsudin, Nasrullah Nasrullah, Mulyadi Mulyadi, Ewan Irawan   +4 more
doaj   +1 more source

Endpoint Distribution Modeling-Based Capture Algorithm for Interfering Multi-Target

Sensors
In physical spaces, pointing interactions cannot rely on cursors, rays, or virtual hands for feedback as in virtual environments; users must rely solely on their perception and experience to capture targets.
Xiangliang Zhang, Junlin Li, Pengjie Li, Fang Si, Xiangzhi Liu, Yu Gu, Shuguang Meng, Jibin Yin, Tao Liu   +8 more
doaj   +1 more source

Primary Beam and Dish Surface Characterization at the Allen Telescope Array by Radio Holography

, 2011
The Allen Telescope Array (ATA) is a cm-wave interferometer in California, comprising 42 antenna elements with 6-m diameter dishes. We characterize the antenna optical accuracy using two-antenna interferometry and radio holography. The distortion of each
Ackermann, R. F., ATA GROUP, Atkinson, Shannon, Backer, D. C., Backus, P. R., Barott, William, Bauermeister, Amber, Blair, Samantha K., Blitz, Leo, Bock, D. C. -J., Bower, Geoffrey C., Bradford, Tucker, Cheng, Calvin, Croft, Steve, Davis, M. M., DeBoer, D. R., Dexter, Matt, Dreher, John, Engargiola, Greg, Fields, Ed, Forster, J. R., Gutierrez-Kraybill, Colby, Harp, G. R., Heiles, Carl, Helfer, Tamara, Jordan, Jane, Jorgensen, Susan, Keating, Garrett, Kilsdonk, Tom, Law, Casey, Lugten, John, MacMahon, D. H. E., McMahon, Peter, Milgrome, Oren, Nadler, Z. J., Pierson, Tom, Randall, Karen, Ross, John, Shostak, Seth, Siemion, Andrew, Smolek, Ken, Tarter, J. C., Thornton, Douglas, Urry, Lynn, Welch, W. J., Werthimer, Dan, Whysong, David, Williams, Peter K. G., Wright, M. C. H.   +48 more
core   +1 more source

Improvement of the Pointing Accuracy of Shipborne Optical Measuring Equipment Based on a Subdivision Iteration Algorithm

IEEE Access
When performing measurement and control tasks at sea, the optical measuring equipment on an aerospace survey ship must demonstrate a high pointing accuracy.
Xin Huang, Jing Wang, Dong Wang, Jiahao Peng, Bao Zhao   +4 more
doaj   +1 more source

Ranging performance of satellite laser altimeters [PDF]

Topographic mapping of the earth, moon and planets can be accomplished with high resolution and accuracy using satellite laser altimeters. These systems employ nanosecond laser pulses and microradian beam divergences to achieve submeter vertical range ...
Gardner, Chester S.
core   +1 more source

The Feasibility of the Disturbance Accommodating Controller for Precision Antenna Pointing [PDF]

The objective of this study is to investigate the feasibility of a pointing (position loop) controller for the NASA-JPL Deep Space Network (DSN) antennas using the Disturbance Accommodating Control (DAC) theory.
Gresham, L. L., Guiar, C. N., Lansing, F. L.   +2 more
core   +1 more source

Sun-pointing programs and their accuracy

, 1981
Several sun-pointing programs and their accuracy are described. FORTRAN program listings are given. Program descriptions are given for both Hewlett-Packard (HP-67) and Texas Instruments (TI-59) hand-held calculators.
openaire   +2 more sources

Using gravitational-wave standard sirens

, 2004
Gravitational waves (GWs) from supermassive binary black hole (BBH) inspirals are potentially powerful standard sirens (the GW analog to standard candles) (Schutz 1986, 2002).
Holz, Daniel E., Hughes, Scott A.
core   +1 more source

A general purpose stabilised balloon platform [PDF]

The development of a three axis stabilized balloon platform capable of being operated in three modes of increasing accuracy is discussed. The system relies on angular motion sensing for primary feedback with linear accelerometers, magnetometers, and a ...
How, J.
core   +1 more source