Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Douglas S. Robertson"'
Publikováno v:
Journal of Geophysical Research: Biogeosciences. 118:1006-1014
[1] The Chicxulub asteroid impact produced massive extinction in terrestrial environments most likely through an intense heat pulse and subsequent widespread fires. Aquatic environments were shielded from this heat and fire but nevertheless showed ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94653ac69ec121a7f4810bfe0fe0de01
https://doi.org/10.1002/jgrg.20086
https://doi.org/10.1002/jgrg.20086
Publikováno v:
Journal of Geophysical Research: Biogeosciences. 118:329-336
[1] The global debris layer created by the end-Cretaceous impact at Chicxulub contained enough soot to indicate that the entire terrestrial biosphere had burned. Preliminary modeling showed that the reentry of ejecta would have caused a global infrar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59971fe8c6a287492153ecbdce4207ef
https://doi.org/10.1002/jgrg.20018
https://doi.org/10.1002/jgrg.20018
Autor:
Douglas S. Robertson, Pawel Wielgosz, Paul S. J. Spencer, Dru A. Smith, Israel Kashani, Dorota A. Grejner-Brzezinska, Gerald L. Mader
Publikováno v:
Journal of Surveying Engineering. 133:56-65
Fast and reliable ambiguity resolution (AR) is particularly challenging in long-range real-time kinematic (RTK) global positioning system (GPS), since the atmospheric errors decorrelate with the increasing base-rover separation, effectively reducing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd23932d4876f3e37437afc751fa4e1d
https://doi.org/10.1061/(asce)0733-9453(2007)133:2(56)
https://doi.org/10.1061/(asce)0733-9453(2007)133:2(56)
Autor:
Pawel Wielgosz, Attila Komjathy, Dru A. Smith, Israel Kashani, Douglas S. Robertson, Gerald L. Mader, Dorota A. Grejner-Brzezinska
Publikováno v:
Navigation. 53:203-217
Reliable modeling of ionospheric delays is one of the most challenging aspects of network-based real-time kinematic GPS. Various ionospheric models derived from global, regional, and local permanently tracking networks have been developed to support
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bac3700ef3bb9ff454f0695588e4cf87
https://doi.org/10.1002/j.2161-4296.2006.tb00383.x
https://doi.org/10.1002/j.2161-4296.2006.tb00383.x
Autor:
Pawel Wielgosz, Dru A. Smith, Douglas S. Robertson, Paul S. J. Spencer, Gerald L. Mader, Dorota A. Grejner-Brzezinska, Israel Kashani
Publikováno v:
Journal of Global Positioning Systems. 3:115-131
The primary objective of this paper is to test several methods of modeling the ionospheric corrections derived from a reference GPS network, and to study the impact of the models’ accuracy on the user positioning results. The five ionospheric model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7998966c877575ab78d3327f0bfa1e1c
https://doi.org/10.5081/jgps.3.1.115
https://doi.org/10.5081/jgps.3.1.115
Autor:
Stuart Farthing, Peter White, Douglas S. Robertson, Jerald Podair, Patricia Mooney-Melvin, Karen A. Franck, Jeanette Findlay, Moya Kneafsay, Carol L. Dauda
Publikováno v:
Urban Studies. 40:179-194
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b77b5857442ecedabbee45ec08c42683
https://doi.org/10.1080/00420980220080231
https://doi.org/10.1080/00420980220080231
Publikováno v:
Journal of Geodesy. 74:783-795
The gravitational attractions of terrestrial masses and condensed terrestrial masses were modeled in local regions of gravity stations in different ways. These differences in the models included the type of coordinate frame (Cartesian versus spherica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17a805073cc3d3fcec84b80ebd449133
https://doi.org/10.1007/s001900000142
https://doi.org/10.1007/s001900000142
Autor:
Douglas S. Robertson
Publikováno v:
Complexity. 5:22-27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b11d0ff1c68451533f9b9b6aa41c96d6
https://doi.org/10.1002/1099-0526(200005/06)5:5<22::aid-cplx4>3.0.co
https://doi.org/10.1002/1099-0526(200005/06)5:5<22::aid-cplx4>3.0.co
Autor:
Douglas S. Robertson
Publikováno v:
Complexity. 4:25-34
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f816d9c4bd7f9d8266989e29fe481f8
https://doi.org/10.1002/(sici)1099-0526(199901/02)4:3<25::aid-cplx5>3.0.co
https://doi.org/10.1002/(sici)1099-0526(199901/02)4:3<25::aid-cplx5>3.0.co
Publikováno v:
Measurement Science and Technology. 10:478-486
We report on a recent determination of the Newtonian constant of gravity, G, using a new `free fall' method. This method uses a freely falling test object to sense the gravitational field of a ring-shaped mass placed alternately above and below the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91f446fc1b837b316bbb395eeb286399
https://doi.org/10.1088/0957-0233/10/6/311
https://doi.org/10.1088/0957-0233/10/6/311