Zobrazeno 1 - 10
of 21
pro vyhledávání: '"George E. Lockard"'
Autor:
Farzin Amzajerdian, Glenn D. Hines, Bruce W. Barnes, Diego F. Pierrottet, Larry B. Petway, George E. Lockard
Publikováno v:
2012 IEEE Aerospace Conference.
Landing mission concepts that are being developed for exploration of planetary bodies are increasingly ambitious in their implementations and objectives. Most of these missions require accurate position and velocity data during their descent phase in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3290740183e6d9365e67d4c3b88e7a6
https://doi.org/10.1109/aero.2012.6187004
https://doi.org/10.1109/aero.2012.6187004
Autor:
Farzin Amzajerdian, Bruce W. Barnes, Larry B. Petway, Glenn D. Hines, George E. Lockard, Diego F. Pierrottet
Publikováno v:
Lasers, Sources, and Related Photonic Devices.
A fiber-based coherent Doppler lidar capable of providing highly accurate vector velocity and altitude data has been developed for precision navigation of space vehicles landing on the Moon, Mars, or asteroids.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::381065bea009c0343e96be2d22466699
https://doi.org/10.1364/filas.2012.fth3.1a.2
https://doi.org/10.1364/filas.2012.fth3.1a.2
Autor:
Farzin Amzajerdian, George E. Lockard, Bruce W. Barnes, Diego F. Pierrottet, Larry B. Petway, Glenn D. Hines
Publikováno v:
Sensors and Systems for Space Applications IV.
An all fiber Navigation Doppler Lidar (NDL) system is under development at NASA Langley Research Center (LaRC) for precision descent and landing applications on planetary bodies. The sensor produces high resolution line of sight range, altitude above
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::421fe83088b4aa33be577a8634827e58
https://doi.org/10.1117/12.886826
https://doi.org/10.1117/12.886826
Autor:
Farzin Amzajerdian, Diego F. Pierrottet, Bruce W. Barnes, Larry B. Petway, Glenn D. Hines, George E. Lockard
Publikováno v:
Advances in Optical Materials.
A coherent Doppler lidar capable of providing highly accurate vector velocity and altitude data is being developed for enabling precision navigation of landing vehicles to the designated safe landing site.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de7e7334f278b959385001d44b015259
https://doi.org/10.1364/filas.2011.fwc1
https://doi.org/10.1364/filas.2011.fwc1
Publikováno v:
Optics letters. 20(8)
An optical efficiency of 0.052 under normal mode operation for diode-pumped Ho:Tm:YLiF(4) at a pulse repetition frequency of 10 Hz has been achieved. Laser output energy of 30 mJ in single Q-switched pulses with 600-ns pulse length were obtained for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5aea005cbc3f59b3933823dca8f0de80
https://pubmed.ncbi.nlm.nih.gov/19859358
https://pubmed.ncbi.nlm.nih.gov/19859358
Publikováno v:
SPIE Proceedings.
A navigation Doppler Lidar (DL) was developed at NASA Langley Research Center (LaRC) for high precision velocity measurements from a lunar or planetary landing vehicle in support of the Autonomous Landing and Hazard Avoidance Technology (ALHAT) proje
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ddb6915f380c8e9a8f19a8f7989921c
https://doi.org/10.1117/12.821902
https://doi.org/10.1117/12.821902
Autor:
Larry B. Petway, Diego F. Pierrottet, Bruce W. Barnes, George E. Lockard, Farzin Amzajerdian, Manuel Rubio
Publikováno v:
MRS Proceedings. 1076
An all fiber linear frequency modulated continuous wave (FMCW) coherent laser radar system is under development with a goal to aide NASA s new Space Exploration initiative for manned and robotic missions to the Moon and Mars. By employing a combinati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bdf42eed5f7adf3dd3b7dd571d5e332c
https://doi.org/10.1557/proc-1076-k04-06
https://doi.org/10.1557/proc-1076-k04-06
Autor:
Bruce W. Barnes, Byron Meadows, George E. Lockard, Michael J. Kavaya, Farzin Amzajerdian, N.R. Baker, Upendra N. Singh
Publikováno v:
Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies.
Reliability and lifetime of quasi-CW laser diode arrays are greatly influenced by their thermal characteristics. This paper examines the thermal properties of laser diode arrays operating in long pulse duration regime.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::134c6d17dea98a69a9bf923d951f5cd5
https://doi.org/10.1364/phast.2006.pthe5
https://doi.org/10.1364/phast.2006.pthe5
Autor:
Norman P. Barnes, P.L. Cross, P. L. Ponsardin, James C. Barnes, George E. Lockard, W.C. Edwards
Publikováno v:
[Proceedings] IGARSS'91 Remote Sensing: Global Monitoring for Earth Management.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::831f2fda2deb97e95696cc96d9f2d378
https://doi.org/10.1109/igarss.1991.579330
https://doi.org/10.1109/igarss.1991.579330
Autor:
Nathaniel R. Baker, Michael J. Kavaya, Byron Meadows, Bruce W. Barnes, George E. Lockard, Renee S. Baggott, Farzin Amzajerdian, Upendra N. Singh
Publikováno v:
SPIE Proceedings.
Most Lidar applications rely on moderate to high power solid state lasers to generate the required transmitted pulses. However, the reliability of solid state lasers, which can operate autonomously over long periods, is constrained by their laser dio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f72181ba9cd58144cce91f0bb6922616
https://doi.org/10.1117/12.620102
https://doi.org/10.1117/12.620102