Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Ronald L. Beard"'
Autor:
Michael J. Coleman, Ronald L. Beard
Publikováno v:
NAVIGATION. 67:333-346
The US Naval Research Laboratory (NRL) has developed clock ensembles for a number of vital GNSS projects and services throughout the US and international community. Some efforts include algorithms for local realization of Coordinated Universal Time;
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44ff0d33166fe691e1c0a46eb0d84a14
https://doi.org/10.1002/navi.366
https://doi.org/10.1002/navi.366
Autor:
Ronald L. Beard, Michael J. Coleman
Publikováno v:
ION Pacific PNT.
The US Naval Research Laboratory (NRL) has been active in the development of clock ensembling technology over the past decades that has become part of a number of vital GNSS projects and services throughout the US and international community. Some of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff99c867dc5765382d1faab8d4d5812d
https://doi.org/10.33012/2019.16779
https://doi.org/10.33012/2019.16779
Autor:
Ronald L Beard
Publikováno v:
Metrologia. 48:S125-S131
The International Telecommunications Union (ITU) is the leading United Nations agency for Radio and Telecommunications coordination worldwide. The process of managing overall frequency spectrum utilization is through Worldwide Radio Conferences, asso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::439c70dc65e31592003a6ad4abe48192
https://doi.org/10.1088/0026-1394/48/4/s02
https://doi.org/10.1088/0026-1394/48/4/s02
Autor:
Ronald L. Beard
Publikováno v:
Proceedings of the International Astronomical Union. 5:85-88
Today's time and frequency standards range from the most sophisticated reference standards to the smallest oscillator for handheld radios. The technical requirements and technologies needed are different for the various applications but they derive f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99b384db0e852c9786953de99ccb198d
https://doi.org/10.1017/s1743921309990196
https://doi.org/10.1017/s1743921309990196
Autor:
Ronald L. Beard
Publikováno v:
Navigation. 56:1-8
The international atomic time scale used by broadcast services throughout the world is Coordinated Universal Time (UTC). UTC, defined by the International Telecommunication Union (ITU-R), is maintained by the International Bureau of Weights and Measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aae7e9c33fa0ead707c363018702c185
https://doi.org/10.1002/j.2161-4296.2009.tb00439.x
https://doi.org/10.1002/j.2161-4296.2009.tb00439.x
Publikováno v:
GPS Solutions. 12:211-225
The clock products of the International Global Navigation Satellite Systems (GNSS) Service (IGS) are used to characterize the timing performance of the GPS satellites. Using 5-min and 30-s observational samples and focusing only on the sub-daily regi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4febc16a823d228a11bc5363bf034132
https://doi.org/10.1007/s10291-008-0089-9
https://doi.org/10.1007/s10291-008-0089-9
Publikováno v:
GPS Solutions. 4:41-46
Dual-frequency carrier phase and code measurements from geodetic type receivers are a promising tool for frequency and time transfer. In order to use them for clock comparisons, all instrumental delays should be calibrated. We have carried out the ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cb61b3da129b9b0099002209fca7318
https://doi.org/10.1007/pl00012865
https://doi.org/10.1007/pl00012865
Autor:
Joseph White, Ronald L. Beard
Publikováno v:
GPS Solutions. 3:17-25
The Global Positioning System (GPS), in addition to providing precise navigation and positioning information, produces precise time and frequency measurements. These measurements result from the atomic clocks in the GPS satellites, which are closely
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f269844cab06f737377e36479cbaec24
https://doi.org/10.1007/pl00012774
https://doi.org/10.1007/pl00012774
Publikováno v:
Navigation. 42:109-164
Navigation by use of earth satellites is expanding explosively. Current estimates are that 60,000 civil sets are being produced each month. With increased use in automobiles, ships, and airplanes, this application of satellites is expected soon to ri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3a9128aeadd03d0ada9ebf1c4448337
https://doi.org/10.1002/j.2161-4296.1995.tb02333.x
https://doi.org/10.1002/j.2161-4296.1995.tb02333.x
Autor:
Ronald L Beard
Publikováno v:
2011 XXXth URSI General Assembly and Scientific Symposium.
The International Telecommunications Union (ITU) is the leading United Nations agency for Radio and Telecommunications coordination worldwide. Overall frequency spectrum utilization is managed through Worldwide Radio Conferences, associated radiocomm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdf59e51630569e4e9cfebed6012cf40
https://doi.org/10.1109/ursigass.2011.6050280
https://doi.org/10.1109/ursigass.2011.6050280