Results 121 to 130 of about 41,139 (300)
A 116 Year Record of Mass Transfer in R Arae [PDF]
Reed, P. A., 2011, Information Bulletin on Variable Stars, 5975, 2011 This is a period study of the bright interacting southern eclipsing binary star R Arae. New photometric data are combined with archival data to determine R Ara's average mass transfer rate over the past 116 years through the analysis of the resulting ephemeris curve. An updated ephemeris is given.
arxiv
Adaptive Fault‐Tolerant Multiplicative Attitude Filtering for Small Satellites
International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 1, Page 152-162, January 2025.This study presents a probabilistic adaptive Kalman filter for small satellite attitude determination, demonstrating superior fault tolerance by effectively correcting sensor faults and outperforming conventional and other adaptive filters. ABSTRACT This study tackles the problem of fault‐tolerant attitude estimation for small satellites.
Hasan Kinatas, Chingiz Hajiyev
wiley +1 more source
The Prediction of Geocentric Corrections during Communication Link Outages in PPP
Sensors, 2020 The International GNSS Service (IGS) real-time service (RTS) provides access to real-time precise products. State-Space Representation (SSR) products are disseminated through the Internet using the Networked Transport of the RTCM (Radio Technical ...
Joanna Janicka +4 more
doaj +1 more source
, 2003 The magnetic Cataclysmic Variable (mCV) V1432 Aql (RX 1940.1-1025) belongs to the four-member subclass of near-synchronous polars with a slight non-synchronism ( 10 R_wd (68% confidence).Comment: 12 pages, 10 figures, 6 tables accepted by A&
Benlloch, S. +7 more
core +1 more source
VLBA Astrometric Observations of the Cassini Spacecraft at Saturn [PDF]
, 2010 The planetary ephemeris is an essential tool for interplanetary spacecraft navigation, studies of solar system dynamics (including, for example, barycenter corrections for pulsar timing ephemeredes), the prediction of occultations, and tests of general relativity.
arxiv +1 more source
, 2009 The latest version of the planetary ephemerides developed at the Paris Observatory and at the Besancon Observatory is presented here. INPOP08 is a 4-dimension ephemeris since it provides to users positions and velocities of planets and the relation ...
A. Fienga +24 more
core +3 more sources
LANDSAT D position determination and correction study [PDF]
An assessment of accuracy of the knowledge of LANDSAT D spacecraft ephemeris data, an evaluation of the impact of expected attitude and alignment accuracies and analysis of the various options for the combining of precision ephemeris and attitude data ...
core +1 more source
Improving the Accuracy of the Martian Ephemeris Short-Term Prediction
Advances in Astronomy, 2018 The Chinese Mars exploration mission is planned to be launched in 2020, which includes an orbiter, a lander, and a rover. High precision Martian ephemeris is very important in Mars exploration, especially for the Martian orbit insertion and the Martian ...
Quan Shan +5 more
doaj +1 more source