Results 61 to 70 of about 134,911 (241)

Seasonality and Albedo Dependence of Cloud Radiative Forcing in the Upper Colorado River Basin

open access: yesJournal of Geophysical Research: Atmospheres, Volume 130, Issue 6, 28 March 2025.
Abstract Mountains create and enhance their own clouds, which both scatter and absorb shortwave radiation from the sun and absorb and re‐emit land surface and atmospheric longwave radiation. However, the impacts of clouds on the surface radiation balance in high elevation snowy mountain terrain are poorly explored.
William Rudisill   +4 more
wiley   +1 more source

Data efemerik teliti dari internet untuk pemrosesan jarak basis. [PDF]

open access: yes, 1999
Recently, the Precise Ephemeris (PE) data can be downloaded freely from internet at specific address. This paper is purposed to describe the implementation of precise ephemeris that obtained from internet for baseline processing.
Catur Aries Rokhmana.
core   +1 more source

An extensive photometric study of the recently discovered intermediate polar V647 Aur (1RXS J063631.9+353537) [PDF]

open access: yes, 2014
We report the results of photometry of the intermediate polar V647 Aur. Observations were obtained over 42 nights in 2012 and 2013. The total duration of the observations was 246 h. We clearly detected three oscillations with periods of 932.9123+\-0.0011,
Kozhevnikov, V. P.
core   +1 more source

Saturn's Small‐Scale Winds Revealed by Its High‐Degree Gravity Field

open access: yesGeophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract During its Grand Finale, the Cassini spacecraft collected crucial gravity data, revealing Saturn's low‐degree gravity harmonics and large‐scale zonal winds extending about 8,000 km deep. However, determining the high‐degree gravity field, essential for understanding small‐scale atmospheric dynamics, is challenging due to the limited spatial ...
S. Kim   +4 more
wiley   +1 more source

Orbital Period Refinement of CoRoT Planets with TESS Observations

open access: yesFrontiers in Astronomy and Space Sciences, 2021
CoRoT was the first space mission dedicated to exoplanet detection. Operational between 2007 and 2012, this mission discovered 37 transiting planets, including CoRoT-7b, the first terrestrial exoplanet with a measured size. The precision of the published
Peter Klagyivik    +8 more
doaj   +1 more source

Modern observations of Hubble's first-discovered Cepheid in M31 [PDF]

open access: yes, 2011
We present a modern ephemeris and modern light curve of the first-discovered Cepheid variable in M31, Edwin Hubble's M31-V1. Observers of the American Association of Variable Star Observers undertook these observations during the latter half of 2010.
arxiv   +1 more source

Unlocking ecological insights from sub‐seasonal visible‐to‐shortwave infrared imaging spectroscopy: The SHIFT campaign

open access: yesEcosphere, Volume 16, Issue 3, March 2025.
Abstract We stand at the threshold of a transformative era in Earth observation, marked by space‐borne visible‐to‐shortwave infrared (VSWIR) imaging spectrometers that promise consistent global observations of ecosystem function, phenology, and inter‐ and intra‐annual change.
K. Dana Chadwick   +112 more
wiley   +1 more source

Optical Tracking Data Validation and Orbit Estimation for Sparse Observations of Satellites by the OWL-Net

open access: yesSensors, 2018
An Optical Wide-field patroL-Network (OWL-Net) has been developed for maintaining Korean low Earth orbit (LEO) satellites’ orbital ephemeris. The OWL-Net consists of five optical tracking stations.
Jin Choi   +5 more
doaj   +1 more source

Period, epoch and prediction errors of ephemeris from continuous sets of timing measurements

open access: yes, 2015
Space missions such as Kepler and CoRoT have led to large numbers of eclipse or transit measurements in nearly continuous time series. This paper shows how to obtain the period error in such measurements from a basic linear least-squares fit, and how to ...
Deeg, Hans J.
core   +1 more source

Optical and Infrared Light Curves of the Eclipsing X-ray Binary V395 Car = 2S 0921-630 [PDF]

open access: yes, 2012
We present results of optical and infrared photometric monitoring of the eclipsing low-mass X-ray binary V395 Car (2S 0921-630). Our observations reveal a clear, repeating orbital modulation with an amplitude of about one magnitude in B, and V and a ...
Bayless   +20 more
core   +3 more sources

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