Results 111 to 120 of about 41,139 (300)

Lunar targeting study: Lunar and planetary Ephemeris tapes [PDF]

The Univac 1108 computer tape data formats are documented for the ephermeris tape generated by the Jet Propulsion Laboratory and the ephemeris tape used by the Quick Response Targeting Program (QRTP).
Green, W. G., Matthys, V. J.
core   +1 more source

NICMOS Observations of the Transiting Hot Jupiter XO-1b

, 2010
We refine the physical parameters of the transiting hot Jupiter planet XO-1b and its stellar host XO-1 using HST NICMOS observations. XO-1b has a radius Rp=1.21+/-0.03 RJup, and XO-1 has a radius Rs=0.94+/-0.02 RSun, where the uncertainty in the mass of ...
Box, Brown, Brown, Burke, Burrows, Carter, Carter, Christopher J. Burke, Christopher M. Johns-Krull, Claret, Douglas Long, Eastman, Edmund P. Nelan, Ford, Ford, Ford, Fortney, Gilliland, Gilliland, Gregory, Haghighipour, Holman, Jeff A. Valenti, Kenneth A. Janes, Knutson, L. E. Bergeron, Machalek, Madhusudhan, Mandel, McCullough, Murray, Nutzman, P. R. McCullough, Pirzkal, Pirzkal, Pont, Ronald L. Gilliland, Seager, Sosey, Swain, Thatte, Tinetti, Torres, Xu   +43 more
core   +1 more source

EUVE J0425.6-5714: A Newly Discovered AM Herculis Star [PDF]

, 1998
We detected a new AM Her star serendipitously in a 25 day observation with the EUVE satellite. A coherent period of 85.82 min is present in the EUVE Deep Survey imager light curve of this source.
Cropper M., Cropper M., de Martino D., Greiner J., H. L. Marshall, J. P. Halpern, K. M. Leighly, Kuijpers J., M. Eracleous, Rosen S. R., T. Storchi‐Bergmann, Veron-Cetty M.-P., Woelk U.   +12 more
core   +2 more sources

Channelized Thermal Emission, Promethean‐Type Jets and Surface Changes on Io From Juno Stellar Reference Unit Imagery

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract During Juno's close flybys of Io in 2023 and 2024, its low‐light sensitive Stellar Reference Unit (SRU) was used to conduct a high‐resolution visible wavelength (450–1,100 nm) imaging campaign under Jupiter‐shine illumination. The SRU acquired Juno's highest resolution image of Io's surface (895–1,230 m/pixel) in December 2023 at a high ...
Heidi N. Becker, Paul M. Schenk, Rosaly M. C. Lopes, Martin J. Brennan, Meghan M. Florence, Alessandro Mura, Federico Tosi, Jonathan I. Lunine, James W. Alexander, Michael A. Ravine, Candice J. Hansen, Scott J. Bolton   +11 more
wiley   +1 more source

A Low Earth Orbit Satellite-Orbit Extrapolation Method Based on Multi-Satellite Ephemeris Coordination and Multi-Stream Fractional Autoregressive Integrated Moving Average

Aerospace
The low Earth orbit (LEO) satellite internet network (LEO-SIN) has become a heated issue for the next generation of mobile communications, serving as a crucial means to achieve global wide-area broadband coverage and, especially, mobile phone directly to
Wenliang Lin, Jian Yi, Tong Wang, Ke Wang, Zexi Huang, Zhongliang Deng, Yang Liu, Yicheng Liao, Heng Kang, Zeyang Liu, Junyu Zhang   +10 more
doaj   +1 more source

Comparison of circular orbit and Fourier power series ephemeris representations for backup use by the upper atmosphere research satellite onboard computer [PDF]

The Upper Atmosphere Research Satellite (UARS) is a three-axis stabilized Earth-pointing spacecraft in a low-Earth orbit. The UARS onboard computer (OBC) uses a Fourier Power Series (FPS) ephemeris representation that includes 42 position and 42 velocity
Kast, J. R.
core   +1 more source

Updated Spin Ephemeris for the Cataclysmic Variable EX Hydrae [PDF]

arXiv, 2009
Historical optical data are combined with more recent optical, extreme ultraviolet, and X-ray data to update the spin ephemeris of the cataclysmic variable EX Hya.
arxiv  

Assessing 1‐Second ROTI for Ionospheric Perturbation Monitoring Using Real‐Time Multi‐GNSS Data in China

Space Weather, Volume 23, Issue 2, February 2025.
Abstract With the onset of solar activities of the 25th solar cycle, ionospheric perturbations have become increasingly frequent, posing significant challenges to various applications of Global Navigation Satellite Systems (GNSS). The Rate of Total Electron Content (TEC) Index (Rate of TEC Index (ROTI)), commonly derived from GNSS data sampled at 30‐s ...
Zhouyu Zhang, Ningbo Wang, Ang Liu, Zishen Li, Ang Li, Liangliang Wang, Yunlong Zhang   +6 more
wiley   +1 more source

JPL Development Ephemeris number 96 [PDF]

The fourth issue of JPL Planetary Ephemerides, designated JPL Development Ephemeris No. 96 (DE96), is described. This ephemeris replaces a previous issue which has become obsolete since its release in 1969.
Keesey, M. S. W., Newhall, X. X., Standish, E. M., Jr.   +2 more
core   +1 more source

Numerical simulation of time delay interferometry for eLISA/NGO

, 2013
eLISA/NGO is a new gravitational wave detection proposal with arm length of 10^6 km and one interferometer down-scaled from LISA. Just like LISA and ASTROD-GW, in order to attain the requisite sensitivity for eLISA/NGO, laser frequency noise must be ...
Arun K G, Brumberg V A, Chiou D-W Ni W-T, Demorest P, Dhurandhar S V, Dhurandhar S V, Folkner W M, Gang Wang, Hughes S P, Jennrich O, Kawamura S, Kawamura S, Kuroda K, Li G, LISA Study Team, McMahon J, Men J-R, Ni W-T, Ni W-T, Ni W-T, Phinney S, Planck Surveyor, Soffel M, Tang C-J, Tang C-J Ni W-T, The Advanced LIGO Team, The Advanced Virgo Team, Tinto M, Vincent M A Bender P L, Wang G, Wang G, Wang G, Wei-Tou Ni   +32 more
core   +1 more source