Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Salvatore Alfano"'
Publikováno v:
The Journal of the Astronautical Sciences. 69:1441-1476
The space data association (SDA), an association of global satellite operators working to ensure a controlled, reliable, and efficient space environment, has run a survey among its members to gather data on their Conjunction Assessment concept of ope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58e1edf573cacbe06d2f3d04ce6970d3
https://doi.org/10.1007/s40295-022-00346-8
https://doi.org/10.1007/s40295-022-00346-8
Publikováno v:
Acta Astronautica. 184:241-250
There have been several recent high-profile space events, notably the conjunctions of the Aeolus and Starlink spacecraft (both maneuverable) and the IRAS and GGSE-4 spacecraft (both dead). Here, we examine the timeline, activities, and risks associat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d41f2a80e3dbff5f1853c3e183c9ac07
https://doi.org/10.1016/j.actaastro.2021.04.009
https://doi.org/10.1016/j.actaastro.2021.04.009
Autor:
Salvatore Alfano, Daniel Oltrogge
Publikováno v:
Journal of Space Safety Engineering. 6:72-79
Purpose This article explores the estimated collision risk for earth-orbiting spacecraft; the far-reaching effects of collisions and explosions; and the factors and challenges in obtaining timely, accurate, comprehensive, and transparent positional a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7d4eb915dc7a837b8c5362fc67efb23
https://doi.org/10.1016/j.jsse.2019.05.004
https://doi.org/10.1016/j.jsse.2019.05.004
Autor:
Daniel Oltrogge, Salvatore Alfano
Publikováno v:
Acta Astronautica. 152:891-907
Presented here is a planning and characterization tool to estimate satellite encounter rates for a prospective orbit regime. The prescribed method can be used to estimate the satellite conjunction operational tempo (i.e., the pace of conjunction acti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f4f4e138a9cb3573e270c583ec42f2b
https://doi.org/10.1016/j.actaastro.2018.09.030
https://doi.org/10.1016/j.actaastro.2018.09.030
Publikováno v:
Acta Astronautica. 147:316-345
Knowing the likelihood of collision for satellites operating in Geosynchronous Earth Orbit (GEO) is of extreme importance and interest to the global community and the operators of GEO spacecraft. Yet for all of its importance, a comprehensive assessm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6144799774dbece0b5ede93e8b47735
https://doi.org/10.1016/j.actaastro.2018.03.017
https://doi.org/10.1016/j.actaastro.2018.03.017
Autor:
Daniel Oltrogge, Salvatore Alfano
Publikováno v:
2018 Space Flight Mechanics Meeting.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af68f708fbe0cbaabbcf3a3b035c3ec1
https://doi.org/10.2514/6.2018-2232
https://doi.org/10.2514/6.2018-2232
Autor:
David Finkleman, Salvatore Alfano
Publikováno v:
Acta Astronautica. 99:193-200
This paper extends concepts of signal detection theory to predict the performance of conjunction screening techniques and guiding the selection of keepout and screening thresholds. The most efficient way to identify satellites likely to collide is to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42407d790967152e0aa9adc94df181ee
https://doi.org/10.1016/j.actaastro.2014.02.004
https://doi.org/10.1016/j.actaastro.2014.02.004
Autor:
David A. Vallado, Salvatore Alfano
Publikováno v:
Celestial Mechanics and Dynamical Astronomy. 118:253-271
Relative motion improvements have traditionally focused on inserting additional force models into existing formulations to achieve greater fidelity, or complex expansions to admit eccentric orbits for propagation. A simpler approach may be numericall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bff9a616c584000f7be0ac9334f42067
https://doi.org/10.1007/s10569-014-9531-1
https://doi.org/10.1007/s10569-014-9531-1
Autor:
Salvatore Alfano
Publikováno v:
Journal of Spacecraft and Rockets. 50:686-690
To reduce processing time, satellite-conjunction prediction tools often employ methods to decrease the number of objects for consideration. Various economizing filters are used to identify orbiting pairs that cannot come close enough over a prescribe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::084dc9b5d5f43b6195588911fc6ff3e8
https://doi.org/10.2514/1.a32272
https://doi.org/10.2514/1.a32272
Autor:
Daniel Oltrogge, Salvatore Alfano
Publikováno v:
AIAA/AAS Astrodynamics Specialist Conference.
Probability of collision ( P c ) is becoming more popular as a tool to assess conjunction threats. In this paper, an overview of the types of P c estimation techniques is provided. For each technique, the inputs it requires are delineated. Three-dime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0bb6f31c4f151eb9cff8d0b42b2a95a
https://doi.org/10.2514/6.2016-5654
https://doi.org/10.2514/6.2016-5654