Results 61 to 70 of about 32,900 (194)

X-ray Orbital Modulations in Intermediate Polars [PDF]

, 2005
We present an analysis of 30 archival ASCA and RXTE X-ray observations of 16 intermediate polars to investigate the nature of their orbital modulation.
A. J. Norton, Barrett, Baskill, Beardmore, Beardmore, Bonnet-Bidaud, Bradt, Buckley, Buckley, Buckley, Buckley, Casares, Choi, de Jager, de Martino, Haberl, Haberl, Harlaftis, Haswell, Hellier, Hellier, Hellier, Hellier, Hellier, Hellier, Hellier, Hutchings, Jablonski, James, K. Mukai, Kaluzny, Kunze, Larwood, Lipkin, Martínez-Pais, Mason, Mateo, Mouchet, Mukai, Murray, Murray, Norton, Norton, Norton, Norton, Norton, Norton, Norton, Norton, Osborne, Patterson, Patterson, Patterson, Patterson, Rana, Remillard, Revnivtsev, Rodríguez-Gil, Rosen, Schmidtke, Schrijver, Skillman, Smale, Szkody, Szkody, T. L. Parker, Tanaka, Taylor, Taylor, Watts, Welsh, White, Wood, Zhang, Zharikov   +74 more
core   +2 more sources

Hatching Success of Olive Ridley Sea Turtles in Semi‐Natural Nests: A Pilot Assessment of Microclimate Conditions at Batu Hiu Beach

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Our study investigates the environmental and astronomical drivers of olive ridley (Lepidochelys olivacea) hatching success at Batu Hiu Beach, Indonesia. We demonstrate that air temperature is the dominant predictor of hatching outcomes, while Earth–Moon distance exerts an additional, significant influence independent of humidity and tidal effects ...
Titin Herawati, Indriyani Rahayu, Ismail Maqbul, Arifikriyana Saefuramdhan   +3 more
wiley   +1 more source

Real-Time Precise Point Positioning Method Considering Broadcast Ephemeris Discontinuities

Navigation
With advancements in the broadcast ephemeris accuracy of global navigation satellite systems (GNSSs), precise point positioning based on broadcast ephemeris (BE-PPP) is gradually showing promising prospects.
Quanrun Cheng, Junping Chen, Yize Zhang, Chao Yu   +3 more
doaj   +1 more source

Long-Term Optical Observations Of Two Lmxbs: Uw Crb (=Ms 1603+260) And V1408 Aql (=4U 1957+115) [PDF]

, 2012
We present new optical photometry of two low-mass X-ray binary stars, UW CrB (MS 1603+260) and V1408 Aql (4U 1957+115). UW CrB is an eclipsing binary and we refine its eclipse ephemeris and measure an upper limit to the rate of change of its orbital ...
Bayless, Amanda J., Hakala, Pasi J., Mason, Paul A., Robinson, Edward L.   +3 more
core   +1 more source

Homogenisation of Wind Data for the Period 1997–2023 in Hungary and Analysis of Different Methods Used for Deriving Daily Wind Data

International Journal of Climatology, Volume 46, Issue 2, February 2026.
To bridge the discrepancy between pre‐1997 sparse wind observations and post‐1997 high‐frequency data, we simulate historical daily wind observations from 10‐min data (1997–2023). These simulations enable spatially consistent wind speed estimations across Hungary using MASH homogenisation and MISH interpolation, with seasonal differences evaluated ...
Kinga Bokros, Beatrix Izsák, Mónika Lakatos, Rita Pongrácz   +3 more
wiley   +1 more source

Satellite Ephemeris Parameterization Methods to Support Lunar Positioning, Navigation, and Timing Services

Navigation
Plans to establish a satellite network around the Moon to support communication, position, navigation, and timing services are rapidly evolving. Satellites that are part of this system broadcast their ephemeris as finite parameters to lunar users for ...
Marta Cortinovis, Keidai Iiyama, Grace Gao   +2 more
doaj   +1 more source

Searching for gravitational waves from the Crab pulsar - the problem of timing noise [PDF]

, 2003
Of the current known pulsars, the Crab pulsar (B0531+21) is one of the most promising sources of gravitational waves. The relatively large timing noise of the Crab causes its phase evolution to depart from a simple spin-down model.
, Abbott B (The LIGO Scientific Collaboration), Dupuis R Woan G, Graham Woan, Jaranowski P, Jones D I, Lyne A, Matthew Pitkin   +7 more
core   +3 more sources

Algorithm Theoretical Basis for Version 3 TEMPO Level 0–1 Processor

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract The Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument is the first spaceborne hyperspectral spectrometer that measures backscattered sunlight over North America in a geostationary orbit. The two charge‐coupled device (CCD) detectors of TEMPO, with spectral coverages of 293–494 and 538–741 nm and resolutions of 0.53–0.63 nm ...
Heesung Chong, Xiong Liu, John Houck, David E. Flittner, James Carr, Weizhen Hou, John E. Davis, Raid M. Suleiman, Kelly Chance, Nischal Mishra, Christopher Chan Miller, Gonzalo González Abad, Brian Baker, James Lasnik, Dennis Nicks, Juseon Bak, Caroline R. Nowlan, Huiqun Wang, Junsung Park, Jean Fitzmaurice, Laurel Carpenter   +20 more
wiley   +1 more source

Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites

Sensors, 2019
In August 2016, Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. If these satellites could be used, an improvement in the position accuracy would be achieved.
Umberto Robustelli, Guido Benassai, Giovanni Pugliano   +2 more
doaj   +1 more source

The Selection of Ground Stations for IGS Products [PDF]

Journal of Astronomy and Space Sciences, 2007
The selection of ground stations is one of the essential process of IGS (International GNSS Service) products. High quality GPS data should be collected from the globally distributed ground stations.
Sung-Wook Jung, Jeong-Ho Baek, Tae-Suk Bae, Jung Hyun Jo, Sungki Cho, Jong-Uk Park   +5 more
doaj   +1 more source