Results 41 to 50 of about 32,900 (194)

Preservation of Historically and Scientifically Important Geospatial Data From Venus

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract A large volume of scientifically and historically important data from the early exploration of Venus is not widely available to researchers. Our work is focused on ameliorating this problem with the archival of geospatial data including radar, topography, and radiometry.
T. J. Austin, J. G. O'Rourke, D. M. Nelson   +2 more
wiley   +1 more source

THE ASTROMETRIC RESULTS OF OBSERVATIONS OF PERIODICAL COMETS AT KT-50 TELESCOPE IN RI “MAO”

Odessa Astronomical Publications, 2017
The  astrometric  results  of  the observations  of  10  periodical  comets  in  2017  are presented.  The  observations  were  made  with  telescope KT-50  telescope  in  RI  «Mykolaiv  Astronomical Observatory».
A. V. Pomazan, N. V. Maigurova, O. V. Shulga   +2 more
doaj   +1 more source

Non-detection of previously reported transits of HD 97658b with MOST photometry [PDF]

, 2012
The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 \pm 0.28 R_{Earth}. As a transiting super-Earth orbiting a bright star, this planet would make an attractive candidate for ...
Antoci, Victoria, Dragomir, Diana, Guenther, David B., Henry, Gregory W., Howard, Andrew W., Johnson, John A., Kuschnig, Rainer, Marcy, Geoffrey W., Matthews, Jaymie M., Moffat, Anthony F. J., Rowe, Jason F., Rucinski, Slavek M., Sasselov, Dimitar, Weiss, Werner W.   +13 more
core   +3 more sources

Periodic Density Structures Observed in Ulysses Data: First Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol, Nicholeen Viall, Larry Kepko, Simone Di Matteo   +3 more
wiley   +1 more source

Evaluating the OMNI Database: Statistical Analysis of Time‐Shifted L1 Data Versus Direct Near‐Earth Solar Wind Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract This study presents a comprehensive statistical comparison of solar wind measurements between the OMNI database which contains data collected at L1 that is shifted to the bow shock nose, and near‐Earth observations from MMS, Cluster, and THEMIS missions near the bow shock nose.
G. H. Blüthner, M. Volwerk, D. Schmid, R. Nakamura, M. Temmer, O. W. Roberts, F. Koller, A. Varsani   +7 more
wiley   +1 more source

Study on systematic errors of BDS-3 broadcast ephemeris and their effects with Helmert transformation

Satellite Navigation, 2023
Previous studies have not evaluated the systematic errors implied in the third generation of BeiDou-3 Navigation Satellite System (BDS-3) broadcast ephemeris.
Min Li, Jiangnan Zhang, Guo Chen, Liang Chen, Qile Zhao   +4 more
doaj   +1 more source

Assessing Potential Landing Sites With Favorable Illumination and Accessible, Potentially Volatile‐Rich Permanently Shadowed Regions Within Artemis Candidate Landing Regions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The lunar south pole features permanently shadowed regions (PSRs) that never receive direct sunlight. These regions maintain cold temperatures that potentially trap and accumulate volatiles over geologic timescales. Within NASA's Artemis candidate landing regions, we identified 130 candidate landing sites (CLSs) that satisfy the Human Landing ...
Lukas Wueller, Lauren M. Berger, Hephzibah Christopher, Kanori Sugimoto, Ashka D. Thaker, Louis Carton, William Jo, Seungil Lee, Riccardo Pedrelli, Pedro Sanchez, David A. Kring   +10 more
wiley   +1 more source

Transit observations at the observatory in Grossschwabhausen: XO-1b and TrES-1 [PDF]

, 2008
We report on observations of transit events of the transiting planets XO-1b and TrES-1 with the AIU Jena telescope in Grossschwabhausen. Based on our IR photometry (in March 2007) and available transit timings (SuperWASP, XO and TLC-project-data) we ...
A. Koeltzsch, A. Seifahrt, Broeg, C. Broeg, J. Koppenhoefer, M. Hohle, M. Mugrauer, M. Vaňko, R. Neuhäuser, S. Raetz, T. Eisenbeiss, T. O. B. Schmidt, T. Roell   +12 more
core   +2 more sources

Harnessing Satellite Constellations as Signals of Opportunity for an Enhanced Specification of the Satellite Drag Environment in the Critical LEO Regime

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Enhancing the accuracy of orbit predictions for low‐Earth orbit (LEO) satellites and debris is vitally important for satellite owner/operators dedicated to ensuring the safety and sustainability of the LEO environment. Presently, the largest source of error in orbit predictions stems from uncertainties in the estimation of thermospheric mass ...
D. J. Fitzpatrick, E. K. Sutton, M. D. Pilinski, S. E. Palo   +3 more
wiley   +1 more source

Comprehensive Comparisons of Satellite Data, Signals, and Measurements between the BeiDou Navigation Satellite System and the Global Positioning System

Sensors, 2016
The Chinese BeiDou navigation satellite system (BDS) aims to provide global positioning service by 2020. The combined use of BDS and Global Positioning System (GPS) is proposed to provide navigation service with more stringent requirements.
Shau-Shiun Jan, An-Lin Tao
doaj   +1 more source