Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Doyle T. Hall"'
Autor:
Doyle T. Hall
Publikováno v:
The Journal of the Astronautical Sciences. 69:1893-1928
Several commercial organizations have recently launched or plan to launch constellations containing thousands of satellites. Such large constellations potentially adversely affect astronomical observations. This study formulates a set of indicators t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a1f9591320332606652b373ddd9ed73
https://doi.org/10.1007/s40295-022-00358-4
https://doi.org/10.1007/s40295-022-00358-4
Autor:
Doyle T. Hall
Publikováno v:
Journal of Spacecraft and Rockets. 58:715-728
This analysis estimates collision risks between tracked satellites based on the statistically expected collision rate N˙c and number of collisions Nc, which are closely related to the collision pro...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c20956de84e60e57a6b99fe2f0b30591
https://doi.org/10.2514/1.a34919
https://doi.org/10.2514/1.a34919
Autor:
Jacob K. Barros, Paul F. Sydney, John L. Africano, Doyle T. Hall, Paul Kervin, John V. Lambert, Keith T. Knox, Dennis Liang, Lewis C. Roberts, Kris Hamada
Publikováno v:
Icarus. 192:469-474
In August 2002, the near-Earth asteroid 2002 NY40, made its closest approach to the Earth. This provided an opportunity to study a near-Earth asteroid with a variety of instruments. Several of the telescopes at the Maui Space Surveillance System were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e804dc38a3b307193e188895ed509aee
https://doi.org/10.1016/j.icarus.2007.08.007
https://doi.org/10.1016/j.icarus.2007.08.007
Publikováno v:
Journal of Spacecraft and Rockets. 44:910-919
Wehave developed a program to obtain photometry of Earth-orbiting satellites using the U.S. Air Force advanced electrooptical system 3.6m telescope’s Visible Imager instrument, which acquires time-series charge-coupled device images at typical rate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2361b1ab3fe6be282c2a01c8e0e5c3fe
https://doi.org/10.2514/1.27464
https://doi.org/10.2514/1.27464
Autor:
Doyle T. Hall, Mark Matney
Publikováno v:
Space Debris. 2:161-198
We present a new derivation of the probability of collisions between spherical satellites occupying Keplerian orbits. The equations follow from the central concept of the instantaneous collision rate, an expression that describes the occurrence of co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aedb1e7ac294452360e5d519f071a4e3
https://doi.org/10.1023/a:1022916401768
https://doi.org/10.1023/a:1022916401768
Autor:
Doyle T. Hall, Floyd Herbert
Publikováno v:
Journal of Geophysical Research: Planets. 103:19915-19925
One of the torus characteristics of most interest for understanding torus energization is its electron temperature T e . Yet deriving T e has always been difficult because the measured quantity (emission brightness) is controlled jointly by T e and o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d81d7485055c4404bcae3ace8d0491c
https://doi.org/10.1029/98je00796
https://doi.org/10.1029/98je00796
Autor:
Floyd Herbert, Doyle T. Hall
Publikováno v:
Journal of Geophysical Research: Space Physics. 101:10877-10885
We have analyzed Voyager 2 ultraviolet spectrometer observations of the H Lyman α emission from the atomic hydrogen corona of Uranus. The resulting estimated hydrogen density distribution has a radial profile ∝ 1/r2. This distribution implies a we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ab94e19ef2c74c10f92e3ee51ad72dc
https://doi.org/10.1029/96ja00427
https://doi.org/10.1029/96ja00427
Publikováno v:
Icarus. 103:333-336
An analysis is conducted on the Voyager 1 UV Spectrometer solar-occultation data and a Titan flyby spectrum of the north polar region dayglow, in order to infer the tropopausal Ar mixing ratio's upper limit as a function of the CH4 mixing ratio, f(CH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d5f200e8926560a31e1bcd2e5500202
https://doi.org/10.1006/icar.1993.1075
https://doi.org/10.1006/icar.1993.1075
Publikováno v:
SPIE Proceedings.
We explore the problem of reconstructing a 3-d model of a convex object from unresolved time-series photometric measurements (i.e., lightcurves). The problem is broken into three steps. First, the lightcurves are used to recover the albedo-area densi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12366e7db2f80a9de3e935cf7937c32f
https://doi.org/10.1117/12.683015
https://doi.org/10.1117/12.683015