Results 71 to 80 of about 22,280 (246)

PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013 [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
As BeiDou navigation system has been operational since December 2012. There is an increasing desire to use multiple constellation to improve positioning performance. The signal-in-space (SIS) anomaly caused by the ground control and the space vehicle is
Y. Wu, J. Ren, W. Liu, W. Liu
doaj   +1 more source

Massenbegriffe auf dem Prüfstand: Die drei Facetten der Masse

Physik in unserer Zeit, Volume 56, Issue 6, Page 272-280, November 2025.
Masse ist die primäre Eigenschaft, die man physikalischen Körpern zuordnet. Da die Masse verschiedene Rollen übernimmt – so reagiert sie nicht nur auf ein Gravitationsfeld, sie erzeugt auch eines –, müssen diese verschiedenen Rollen und darauf aufbauend die verschiedenen Massenbegriffe genauer analysiert werden.
Eva Hackmann, Claus Lämmerzahl
wiley   +1 more source

PERIOD CHANGE IN THE CONTACT SYSTEM AW UMA

Odessa Astronomical Publications, 2017
Nine new minima were determined from the UBV photoelectric observations obtained in 1992 and 1995-6. They were used to derive the new ephemerides of AW UMa. The mid-eclipse brightening best visible in U colour was detected.
T. Pribulla, D. Chochol
doaj   +1 more source

The quest for companions to post-common envelope binaries: I. Searching a sample of stars from the CSS and SDSS

, 2012
As part of an ongoing collaboration between student groups at high schools and professional astronomers, we have searched for the presence of circum-binary planets in a bona-fide unbiased sample of twelve post-common envelope binaries (PCEBs) from the ...
A. Hahn, A. L. Rochus Vogel, A. Secci, A.-L. Speck, Applegate, B. Rauch, Beuermann, Beuermann, Brinkworth, C. Zapros, Chen, D. Kindermann, F. Althoff, F. Küppers, F. Liebing, F. N. Habermann, F. Niederstadt, F. V. Hessman, For, Horner, J. Dette, J. Diese, J. Dubbert, J. Möllmanns, J. N. Kellerman, K. Beuermann, K. Hoppen, K.-H. Klapdohr, L. Wüllner, Lee, M. Debrah, M. Griemens, M. Horstmann, M. Lauser, M. Pawlowski, M. Sauer, M. Schweizer, N. Haustovich, Parsons, Parsons, Parsons, Pyrzas, Qian, Qian, Qian, R. Kietz, R. Schünecke, Rebassa-Mansergas, S. Bauer, S. Biriuk, S. Dreizler, S. Simons, T. Bollmann, T. Miosga, T. Möller, T. Nienaber, T.-O. Husser, Taam, Todoran, U. Backhaus, Zorotovic   +60 more
core   +1 more source

North‐South Shear Along the West‐Lut Fault, Iran, Imaged From Burst Overlap InSAR

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract High‐resolution geodetic measurements of crustal deformation from InSAR provide crucial constraints on a region's tectonics, geodynamics, and seismic hazard. However, space‐based InSAR usually only provides good constraints on horizontal displacement in the east‐west direction, with the north‐south component typically provided by low ...
Pawan Piromthong, Andrew Hooper, John R. Elliott   +2 more
wiley   +1 more source

Can the Pioneer anomaly be of gravitational origin? A phenomenological answer

, 2007
In order to satisfy the equivalence principle, any non-conventional mechanism proposed to gravitationally explain the Pioneer anomaly, in the form in which it is presently known from the so-far analyzed Pioneer 10/11 data, cannot leave out of ...
A. Vecchiato, A.G. Gemmo, B. Bertotti, C. Talmadge, C.M. Will, E.M. Murphy, E.M. Standish, E.M. Standish, E.M. Standish, E.V. Pitjeva, E.V. Pitjeva, G.L. Page, H. Dittus, J. Katz, J.D. Anderson, J.D. Anderson, J.D. Anderson, J.D. Anderson, J.D. Anderson, J.D. Anderson, J.R. Brownstein, J.S. Anderson, J.W. Moffat, L. Iorio, L.V. Morrison, Lorenzo Iorio, M.-T. Jaekel, M.-T. Jaekel, M.-T. Jaekel, M.-T. Jaekel, M.M. Nieto, P. Bretagnon, R.H. Sanders, R.S. Gomes, S.G. Turyshev, V.P. Rylkov, W.-T. Ni   +36 more
core   +1 more source

First Detection of [SI] in Near‐IR JWST Observations of Io in Eclipse, and Comparison With SO Emissions, Evolving Volcanic Eruptions, and Prior UV HST‐STIS [SI] Emissions

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract We observed Io with the James Webb Space Telescope (JWST) NIRSpec/Integral Field Unit (1.0–5.3 μm, R∼2700 $R\sim 2700$) in August 2023 while the satellite was in eclipse. Thermal emission from Kanehekili Fluctus is consistent with the cooling of lava flows after a vigorous eruption in November 2022.
Imke de Pater, Darrell F. Strobel, Ashley Gerard Davies, Joachim Saur, Lorenz Roth, Katherine de Kleer, Emmanuel Lellouch, Zachariah Milby, Carl Schmidt, Thierry Fouchet, Michael H. Wong, Leigh N. Fletcher, Jake Harkett, Michael Roman, Richard J. Cartwright, Jason E. Perry, Julie Renaud‐Kim, Carolyn Jordan, Stephan Schlegel, David A. Williams, David M. Nelson   +20 more
wiley   +1 more source

A 16-parameter GEO Broadcast Ephemeris [PDF]

Journal of Geodesy and Geoinformation Science, 2018
Currently, the broadcast ephemerides used in GEOs are same as those of the MEOs and IGSOs in the BeiDou navigation constellation. However, a trade-off strategy, i.e.
Zhongkai ZHANG,Lan DU,Li LIU,Feng HE,Yu LU,Peiyuan ZHOU
doaj  

Absolute Timing of the Crab Pulsar with RXTE

, 2004
We have monitored the phase of the main X-ray pulse of the Crab pulsar with the Rossi X-ray Timing Explorer (RXTE) for almost eight years, since the start of the mission in January 1996. The absolute time of RXTE's clock is sufficiently accurate to allow
Andrew G. Lyne, Arnold H. Rots, Keith Jahoda, Lyne A. G., Masnou J. L., Rots A. H., Rots A. H.   +6 more
core   +1 more source

A Comparison of Modeled and Observed Dayside Bow Shock Locations in 8 Years of MMS Data

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The interplay between Earth's magnetic field and the solar wind provides a natural laboratory to study the physics of shock waves in collisionless plasmas. 3D parameterized shape models of Earth's bow shock boundary quantify how this interaction depends on upstream solar wind parameters.
Wenli Mo, Savvas Raptis, Vicki Toy‐Edens, Kiley Yeakel, Drew L. Turner   +4 more
wiley   +1 more source