Results 1 to 10 of about 12,904 (207)
Improving BDS broadcast ephemeris accuracy using ground-satellite-link observations [PDF]
Satellite Navigation, 2022 The BeiDou Navigation Satellite System (BDS) employs a hybrid constellation including GEO (Geosynchronous Earth Orbit), IGSO (Inclined Geosynchronous Orbit), and MEO (Medium Earth Orbit) satellites, where the GEO and IGSO satellites are critical to ...
Junping Chen +4 more
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Remote Sensing, 2021 With the rapid development and gradual perfection of GNSS in recent years, improving the real-time service performance of GNSS has become a research hotspot. In GNSS single-point positioning, broadcast ephemeris is used to provide a space–time reference.
Hanlin Chen +5 more
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Study on the Design of Broadcast Ephemeris Parameters for Low Earth Orbit Satellites [PDF]
Remote SensingThe integration of low Earth orbit (LEO) satellite constellations into the Global Navigation Satellite System (GNSS) has emerged as a prominent research focus, as LEO satellites can significantly enhance the precision of GNSS positioning, navigation, and
Dongzhu Liu +4 more
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Jurnal Ilmiah Islam Futura, 2017 Data of solar coordinate such as longitude and latitude of the ecliptic, declination, and right ascension are the data that are often involved in astronomical reckoning and practical islamic astronomy.
reza akbar
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Evaluation and Anomaly Detection Methods for Broadcast Ephemeris Time Series in the BeiDou Navigation Satellite System. [PDF]
Sensors (Basel)Cai J, Li J, Xie S, Jin H.
europepmc +2 more sources
Ten Years of VIIRS On-Orbit Geolocation Calibration and Performance
Remote Sensing, 2022 The first innovative Visible Infrared Imaging Radiometer Suite (VIIRS) sensor aboard the Suomi National Polar-orbiting Partnership (SNPP) satellite has been in operation for 10 years since its launch on 28 October 2011. The second VIIRS sensor aboard the
Guoqing Lin +4 more
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Development of Kinematic Ephemeris Generator for Korea Pathfinder Lunar Orbiter (KPLO)
Journal of Astronomy and Space Sciences, 2020 This paper presents a kinematic ephemeris generator for Korea Pathfinder Lunar Orbiter (KPLO) and its performance test results. The kinematic ephemeris generator consists of a ground ephemeris compressor and an onboard ephemeris calculator.
Min-Sup Song +3 more
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Daylight Observations of Venus with Naked Eye in the Goryeosa [PDF]
Journal of Astronomy and Space Sciences, 2017 In this paper, we investigate the observations of Venus in daytime that are recorded in the Goryeosa (History of the Goryeo Dynasty, A.D. 918-1392). There are a total of 167 accounts of such observations in this historical book, spanning a period of ...
Ki-Won Lee
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Prediction of Communication Outage Period between Satellite and Earth station Due to Sun Interference [PDF]
Journal of Astronomy and Space Sciences, 2010 We developed a computer program to predict solar interference period. To calculate Sun‘s position, we used DE406 ephemerides and Earth ellipsoid model. The Sun‘s position error is smaller than 10arcsec. For the verification of the calculation, we used
Yongjun Song +3 more
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Effect of Ephemeris on Pulsar Timing and Navigation Accuracy Based on X-ray Pulsar Navigation-I Data
Universe, 2022 Solar system ephemeris is very important for pulsar timing and navigation. In order to explore the effect of different precision ephemerides on X-ray pulsar timing and navigation, the differences between timing and navigation results with four JPL ...
Yongtao Deng, Shuanggen Jin
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