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Journal articles on the topic 'GPS ephemerides'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Warren, David L. M., and John F. Raquet. "Broadcast vs. precise GPS ephemerides: a historical perspective." GPS Solutions 7, no. 3 (2003): 151–56. http://dx.doi.org/10.1007/s10291-003-0065-3.

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2

Kačmařík, Michal, and Pavla Skřivánková. "Comparison of satellite orbit ephemerides for use in GPS meteorology." Advances in Space Research 48, no. 2 (2011): 264–69. http://dx.doi.org/10.1016/j.asr.2011.03.011.

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3

Wermuth, M., A. Hauschild, O. Montenbruck, and R. Kahle. "TerraSAR-X precise orbit determination with real-time GPS ephemerides." Advances in Space Research 50, no. 5 (2012): 549–59. http://dx.doi.org/10.1016/j.asr.2012.03.014.

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4

Bock, Yehuda, Jie Zhang, Peng Fang, Joachim Genrich, Keith Stark, and Shimon Wdowinski. "One Year of Daily Satellite Orbit and Polar Motion Estimation for Near Real Time Crustal Deformation Monitoring." Symposium - International Astronomical Union 156 (1993): 279–84. http://dx.doi.org/10.1017/s0074180900173346.

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The Permanent GPS Geodetic Array (PGGA) in southern California consists of five continuously operating stations established to monitor crustal deformation in near real time. The near real time requirement has been problematic since GPS satellite ephemerides and predicted earth orientation values (IERS Bulletins A and B) have been found to be neither sufficiently timely nor accurate to achieve horizontal position accuracies of several mm on regional scales. Therefore, we have been estimating precise GPS ephemerides and polar motion since August 1991. An examination of overlapping 24-hour satell

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5

Li, Zengke, Nanshan Zheng, Jian Wang, and Jingxiang Gao. "Performance Comparison among Different Precise Satellite Ephemeris and Clock Products for PPP/INS/UWB Tightly Coupled Positioning." Journal of Navigation 71, no. 3 (2017): 585–606. http://dx.doi.org/10.1017/s0373463317000856.

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To meet the requirements of different applications, the International Global Navigation Satellite System (GNSS) Service (IGS) has provided Global Positioning System (GPS) satellite ephemerides and clock products with different accuracy levels (final, rapid and ultra-rapid products). Comparison of Precise Point Positioning/Inertial Navigation System/Ultra Wideband (PPP/INS/UWB) tightly coupled positioning with different precise satellite ephemeris and clock products is made and corresponding data analysis is provided. Final, rapid and ultra-rapid products are applied in a PPP/INS/UWB integrated

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6

Wu, Y., J. Ren, and W. Liu. "PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 3, 2016): 517–23. http://dx.doi.org/10.5194/isprs-archives-xli-b1-517-2016.

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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 one of the major threats to affect the integrity. For a young Global Navigation Satellite System, knowledge about SIS anomalies in history is very important for not only assessing the SIS integrity performance of a constellation but also providing the assumption for ARAIM (Advanced Receiver Autonomous Integrity Monitoring). <br><br>

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7

Monico, J. F. G., V. Ashkenazi, and T. Moore. "High precision GPS network with precise ephemerides and earth body tide model." Revista Brasileira de Geofísica 15, no. 2 (1997): 155–60. http://dx.doi.org/10.1590/s0102-261x1997000200005.

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8

Wu, Y., J. Ren, and W. Liu. "PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 3, 2016): 517–23. http://dx.doi.org/10.5194/isprsarchives-xli-b1-517-2016.

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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 one of the major threats to affect the integrity. For a young Global Navigation Satellite System, knowledge about SIS anomalies in history is very important for not only assessing the SIS integrity performance of a constellation but also providing the assumption for ARAIM (Advanced Receiver Autonomous Integrity Monitoring). &lt;br&gt;&a

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9

Peng, H. M., C. S. Liao, and J. K. Hwang. "Performance Testing of Time Comparison Using GPS-Smoothed P3 Code and IGS Ephemerides." IEEE Transactions on Instrumentation and Measurement 54, no. 2 (2005): 825–28. http://dx.doi.org/10.1109/tim.2004.843402.

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10

McCaskill, Thomas B., Wilson G. Reid, James A. Buisson, and Hugh E. Warren. "Effect of broadcast and precise ephemerides on estimates of the frequency stability of GPS Navstar clocks." International Journal of Satellite Communications 12, no. 5 (1994): 435–41. http://dx.doi.org/10.1002/sat.4600120505.

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11

Sun, Xiucong, Chao Han, and Pei Chen. "Precise real-time navigation of LEO satellites using a single-frequency GPS receiver and ultra-rapid ephemerides." Aerospace Science and Technology 67 (August 2017): 228–36. http://dx.doi.org/10.1016/j.ast.2017.04.006.

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12

Meng, Lingdong, Jiexian Wang, Junping Chen, Bin Wang, and Yize Zhang. "Extended Geometry and Probability Model for GNSS+ Constellation Performance Evaluation." Remote Sensing 12, no. 16 (2020): 2560. http://dx.doi.org/10.3390/rs12162560.

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We proposed an extended geometry and probability model (EGAPM) to analyze the performance of various kinds of (Global Navigation Satellite System) GNSS+ constellation design scenarios in terms of satellite visibility and dilution of precision (DOP) et al. on global and regional scales. Different from conventional methods, requiring real or simulated satellite ephemerides, this new model only uses some basic parameters of one satellite constellation. Verified by the reference values derived from precise satellite ephemerides, the accuracy of visible satellite visibility estimation using EGAPM g

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13

Ocalan, Taylan. "Accuracy assessment of GPS precise point positioning (PPP) technique using different web-based online services in a forest environment." Šumarski list 140, no. 7-8 (2016): 357–67. http://dx.doi.org/10.31298/sl.140.7-8.4.

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Since Global Positioning System (GPS) has been routinely conducted in many engineering projects, it is also effectively applied to the assessment and preventing of forest and natural resources. Depending on the GPS survey method preferred in the applications performed around the forest environments, different level point positioning accuracy can be achieved. Traditionally, for many precise positioning applications, relative static positioning has been used. The data obtained have been analyzed with high-cost scientific and commercial software, which are required a good knowledge of processing

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14

Ocalan, Taylan, Bahattin Erdogan, Nursu Tunalioglu, and Utkan Mustafa Durdag. "Accuracy Investigation of PPP Method Versus Relative Positioning Using Different Satellite Ephemerides Products Near/Under Forest Environment." Earth Sciences Research Journal 20, no. 4 (2016): 1. http://dx.doi.org/10.15446/esrj.v20n4.59496.

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In recent years, due to the increase in providers of orbit and clock corrections of satellites for data evaluation in real-time and post-processing the method of Precise Point Positioning (PPP) using measurements of Global Navigation Satellite System (GNSS) and Web-based online positioning services have become widespread. Owing to some advantages, such as work-duration and cost-effectiveness, many of users have implemented PPP method instead of the traditional relative positioning method for several applications. On GNSS applications the quality of satellite ephemerides products used for data

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15

Angrisano, Antonio, Salvatore Gaglione, Ciro Gioia, Umberto Robustelli, and Mario Vultaggio. "GIOVE Satellites Pseudorange Error Assessment." Journal of Navigation 65, no. 1 (2011): 29–40. http://dx.doi.org/10.1017/s0373463311000270.

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Galileo is a global civil navigation satellite system developed in Europe as an alternative to the GPS controlled by the US Department of Defense and GLONASS controlled by Russian Space Forces. It is scheduled to be operative in 2013 and it will have 30 satellites orbiting on three inclined planes with respect to the equatorial plane at an altitude of about 24 000 km. The aim of this work is the study of the pseudorange error of the GIOVE satellites. To achieve this goal, the specifications defined in Giove A-B Navigation Signal in Space Interface Control Document (ICD) are used to develop a s

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Nistor, Sorin, and Aurelian Stelian Buda. "Analysis of GNSS Data Using Precise Point Positioning Technique for the Determination of Permanent Station in Romania." Mathematical Modelling in Civil Engineering 11, no. 3 (2015): 31–37. http://dx.doi.org/10.1515/mmce-2015-0013.

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Abstract To obtain the coordinates by means of precise point positioning (PPP) technique we need to use the undifferenced GPS pseudocode and carrier phase observations but to obtain the “precise” positioning we need precise orbit and clock data too. This products and other information for obtaining the results by using PPP technique on a centimeter level accuracy can be downloaded from different locations, but the most reliable satellite ephemerides and clock correction are available from International GNSS Service (IGS). In the PPP analysis we determined the parameters such as the receiver cl

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17

Pelc-Mieczkowska, Renata, and Dariusz Tomaszewski. "Space State Representation Product Evaluation in Satellite Position and Receiver Position Domain." Sensors 20, no. 13 (2020): 3791. http://dx.doi.org/10.3390/s20133791.

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In Global Navigation Satellite Systems (GNSS) positioning, important terms in error budget are satellite orbits and satellite clocks correction errors. International services are developing and providing models and correction to minimize the influence of these errors both in post-processing and real-time applications. The International GNSS Service (IGS) Real-Time Service (RTS) provides real-time orbits and clock corrections for the broadcast ephemeris. Real-time products provided by IGS are generated by different analysis centres using different algorithms. In this paper, four RTS products—IG

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18

Koller, J., and S. Zaharia. "LANL<sup>*</sup>V2.0: global modeling and validation." Geoscientific Model Development 4, no. 3 (2011): 669–75. http://dx.doi.org/10.5194/gmd-4-669-2011.

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Abstract. We describe in this paper the new version of LANL*, an artificial neural network (ANN) for calculating the magnetic drift invariant L*. This quantity is used for modeling radiation belt dynamics and for space weather applications. We have implemented the following enhancements in the new version: (1) we have removed the limitation to geosynchronous orbit and the model can now be used for a much larger region. (2) The new version is based on the improved magnetic field model by Tsyganenko and Sitnov (2005) (TS05) instead of the older model by Tsyganenko et al. (2003). We have validate

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19

Koller, J., and S. Zaharia. "LANL* V2.0: global modeling and validation." Geoscientific Model Development Discussions 4, no. 1 (2011): 575–94. http://dx.doi.org/10.5194/gmdd-4-575-2011.

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Abstract. We describe in this paper the new version of LANL*. Just like the previous version, this new version V2.0 of LANL* is an artificial neural network (ANN) for calculating the magnetic drift invariant, L*, that is used for modeling radiation belt dynamics and for other space weather applications. We have implemented the following enhancements in the new version: (1) we have removed the limitation to geosynchronous orbit and the model can now be used for any type of orbit. (2) The new version is based on the improved magnetic field model by Tsyganenko and Sitnov (2005) (TS05) instead of

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20

Reubelt, T., G. Austen, and E. W. Grafarend. "Harmonic analysis of the Earth's gravitational field by means of semi-continuous ephemerides of a low Earth orbiting GPS-tracked satellite. Case study: CHAMP." Journal of Geodesy 77, no. 5-6 (2003): 257–78. http://dx.doi.org/10.1007/s00190-003-0322-9.

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21

Sun, Zhangzhen, Tianhe Xu, Fan Gao, Chunhua Jiang, and Guochang Xu. "The Quality Assessment of Non-Integer-Hour Data in GPS Broadcast Ephemerides and Its Impact on the Accuracy of Real-Time Kinematic Positioning Over the South China Sea." Computer Modeling in Engineering & Sciences 119, no. 2 (2019): 263–80. http://dx.doi.org/10.32604/cmes.2019.04425.

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22

Kunovac Hodžić, Vedad, Amaury H. M. J. Triaud, Heather M. Cegla, William J. Chaplin та Guy R. Davies. "Orbital misalignment of the super-Earth π Men c with the spin of its star". Monthly Notices of the Royal Astronomical Society 502, № 2 (2021): 2893–911. http://dx.doi.org/10.1093/mnras/stab237.

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ABSTRACT Planet–planet scattering events can leave an observable trace of a planet’s migration history in the form of orbital misalignment with respect to the stellar spin axis, which is measurable from spectroscopic time-series taken during transit. We present high-resolution spectroscopic transits observed with ESPRESSO of the close-in super-Earth π Men c. The system also contains an outer giant planet on a wide, eccentric orbit, recently found to be inclined with respect to the inner planetary orbit. These characteristics are reminiscent of past dynamical interactions. We successfully retri

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23

Zou, Xuan, Zhiyuan Li, Yawei Wang, et al. "Multipath Error Fusion Modeling Methods for Multi-GNSS." Remote Sensing 13, no. 15 (2021): 2925. http://dx.doi.org/10.3390/rs13152925.

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The multipath error is considered to be the most limiting factor for high precision positioning applications. The sidereal filtering (SF) method can be used to mitigate the multipath error in the observation domain, and it has been successfully applied in the multipath mitigation in global positioning systems (GPS) and regional BeiDou navigation satellite systems (BDS2). However, there are few reports on the SF method in other systems. The performance of the SF method relies on the explicit orbit repeat periods of satellites in diverse systems or even different types of constellations. It is t

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24

Jia, Rui Xi, Xiao Yu Li, Chang Feng Xia, and Dong Yang Jin. "Broadcast Ephemeris Accuracy Analysis for GPS Based on Precise Ephemeris." Applied Mechanics and Materials 602-605 (August 2014): 3667–70. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.3667.

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The accuracy of broadcast ephemeris is an important index of a satellite navigation system. The theory and method of precise ephemeris assessing broadcast ephemeris are introduced. The accuracy of GPS satellite broadcast ephemeris is assessed with the precise ones provided by IGS. The orbital coordinates of GPS broadcast ephemeris from 18th to 24th October 2013 are calculated. The analysis shows that during this time the GPS satellite broadcast ephemeris is reliable, accurate and safe as the whole, meanwhile the broadcast ephemeris accuracy is about 1 meter, better than nominal accuracy of 5 m

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25

Xie, Shao Feng, Peng Fei Zhang, and Li Long Liu. "Analyzing the Precision of Chebyshev Polynomial Fitting GPS Satellite Ephemeris." Applied Mechanics and Materials 353-356 (August 2013): 3410–13. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.3410.

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Using Chebyshev polynomial to fit precise ephemeris of GPS, the nodes selection has a certain influence on the precision. In this paper we use 3 kinds of precise ephemeris ( IGF, IGR, IGU ) to analyze the difference precision of randomly selected interpolation node and Chebyshev points fitting orbit and compare the difference and precision of fitting orbit by 3 kinds of ephemeris and orbit provided by IGS. The result shows that using Chebyshev points to fit precise ephemeris, the precision of IGF and IGR can achieve mm levels, the precision of IGU can achieve cm levels.

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26

Lihua, Ma, and Meng Wang. "Influence of Ephemeris Error on GPS Single Point Positioning Accuracy." Artificial Satellites 48, no. 3 (2013): 125–39. http://dx.doi.org/10.2478/arsa-2013-0011.

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Abstract The Global Positioning System (GPS) user makes use of the navigation message transmitted from GPS satellites to achieve its location. Because the receiver uses the satellite's location in position calculations, an ephemeris error, a difference between the expected and actual orbital position of a GPS satellite, reduces user accuracy. The influence extent is decided by the precision of broadcast ephemeris from the control station upload. Simulation analysis with the Yuma almanac show that maximum positioning error exists in the case where the ephemeris error is along the line-of-sight

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27

Kim, Mingyu, and Jeongrae Kim. "An Analysis on the Long-Term Variation of the GPS Broadcast Ephemeris Errors." Journal of Korea Navigation Institute 18, no. 5 (2014): 421–28. http://dx.doi.org/10.12673/jant.2014.18.5.421.

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28

Cho, Deuk-Jae, and Sang-Hyun Park. "A Study of GPS Precise Ephemeris Interpolation for Maritime Precise Positioning Applications." Journal of Korean navigation and port research 33, no. 10 (2009): 699–702. http://dx.doi.org/10.5394/kinpr.2009.33.10.699.

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29

Colombo, Oscar L. "Ephemeris errors of GPS satellites." Bulletin Géodésique 60, no. 1 (1986): 64–84. http://dx.doi.org/10.1007/bf02519355.

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30

Xue, Guo Hu, Jun Shan Mu, Hui Fen Li, Li Wei Zhu, and Yang Liu. "Initial Orbit Determination Using Single Frequency GPS Measurements of Launch Vehicle." Applied Mechanics and Materials 599-601 (August 2014): 964–69. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.964.

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Orbit determination by using GPS measurements of a launch vehicle is an important option for the initial orbit determination of the vehicle's payload, and its accuracy is higher than the results generated by radar measurements. However, only broadcast GPS ephemeris and clock products are used in the current GPS measurements processing method, and Klobuchar model is directly used. The paper proposes to use precise ephemeris and clock products, and adopts an improved ionospheric model based on altitude factor for GPS measurements processing. The dynamic smoothing method is further used. The nume

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31

Yousif, Hamad, and Ahmed El-Rabbany. "Assessment of Several Interpolation Methods for Precise GPS Orbit." Journal of Navigation 60, no. 3 (2007): 443–55. http://dx.doi.org/10.1017/s0373463307004250.

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GPS applications such as Precise Point Positioning (PPP) require the availability of precise ephemeris at high rate. To support these applications, several institutions such as the International GNSS Service (IGS) have developed precise orbital service. Unfortunately, however, the data rate of such precise orbits is usually limited to 15 minutes. To overcome this problem, a number of orbital interpolation methods are proposed. This paper examines the performance of four interpolation methods for IGS precise GPS orbits, namely Lagrange, Newton Divided Difference, Cubic Spline and Trigonometric

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32

Choi, Jin Haeng, Gimin Kim, Deok Won Lim, and Chandeok Park. "Study on Optimal Broadcast Ephemeris Parameters for GEO/IGSO Navigation Satellites." Sensors 20, no. 22 (2020): 6544. http://dx.doi.org/10.3390/s20226544.

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This paper proposes new sets of suitable broadcast ephemeris parameters for geosynchronous (GEO) and inclined geosynchronous (IGSO) navigation satellites (NSs). Despite the increasing number of GEO and IGSO NSs, global positioning system (GPS)-type ephemeris parameters are still widely used for them. In an effort to provide higher fit accuracy, we analyze a variety of broadcast ephemeris parameters for GEO and IGSO satellites along with their orbital characteristics and propose optimal sets of parameters. Nonsingular elements and orbital plane rotation are adopted for alleviating/avoiding the

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33

Bezmenov, I. V. "Estimation of precise orbits and clock corrections of GLONASS and GPS navigation satellites in ultra-rapid regime based on observation data." Izmeritel`naya Tekhnika, no. 1 (January 2020): 11–17. http://dx.doi.org/10.32446/0368-1025it.2020-1-11-17.

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The article presents the results on development of an algorithm and a program for calculation in ultra-rapid regime of ephemeris-time information for GLONASS and GPS navigation satellites, achieved by now in the Main metrological center of the state service of time and frequency and determination of earth rotation parameters of VNIIFTRI. Calculation of ephemeris-time information is carried out by data of code and phase measurements at two carrier frequencies. The measurement data are presented in the form of hourly RINEX observation files and navigation message files from tracking stations inv

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34

Rizos, C., E. G. Masters, and A. Stolz. "GPS ephemeris considerations for the Australian." Australian Surveyor 32, no. 7 (1985): 574–83. http://dx.doi.org/10.1080/00050326.1985.10435177.

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35

Ashkenazi, V., and T. Moore. "The Navigation of Navigation Satellites." Journal of Navigation 39, no. 3 (1986): 377–93. http://dx.doi.org/10.1017/s0373463300000850.

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The orbits of navigation satellites have to be determined very precisely. The Transit broadcast (predicted) ephemeris, which is computed by the US Navy Astronautics Group, has an estimated orbital positional accuracy of the order of 25 m in each direction. By contrast, the precise (post-mission) ephemeris, which is determined by the US Defense Mapping Agency, from tracking data collected by the global TRANET network, reaches accuracies of the order of 10 m. These orbital precisions affect the navigation and (static) positioning accuracies which can be achieved by users of the system. The same

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36

Li, Dehai, Wei Yan, Jinzhong Mi, Yamin Dang, Yunbin Yuan, and Xingli Gan. "A Smart Realtime Service to Broadcast the Precise Orbits of GPS Satellite and Its Performance on Precise Point Positioning." Sensors 20, no. 11 (2020): 3276. http://dx.doi.org/10.3390/s20113276.

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At present, Global Position System (GPS) navigation ephemeris mainly broadcasts satellite orbits with meter-level precision for standard point positioning and precise relative positioning. With the rapid development of real-time precise point positioning (PPP), the receiver or smartphone has begun to demand more and more convenient, continuous, and reliable access to real-time services of precise orbits. Therefore, this study proposes a solution of utilizing the 18-parameter ephemeris to directly broadcast ultra-rapid precise predicted orbits with centimeter-level precision for real-time PPP.

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Gong, Xuewen, Jizhang Sang, Fuhong Wang, and Xingxing Li. "LEO Onboard Real-Time Orbit Determination Using GPS/BDS Data with an Optimal Stochastic Model." Remote Sensing 12, no. 20 (2020): 3458. http://dx.doi.org/10.3390/rs12203458.

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The advancements of Earth observations, remote sensing, communications and navigation augmentation based on low Earth orbit (LEO) platforms present strong requirements for accurate, real-time and autonomous navigation of LEO satellites. Precise onboard real-time orbit determination (RTOD) using the space-borne data of multiple global navigation satellite systems (multi-GNSS) becomes practicable along with the availability of multi-GNSS. We study the onboard RTOD algorithm and experiments by using America’s Global Positioning System (GPS) and China’s regional BeiDou Navigation Satellite System

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38

Wang, He-Sheng. "GPS Ephemeris Extension Using Method of Averaging." Recent Patents on Space Technology 2, no. 2 (2012): 145–51. http://dx.doi.org/10.2174/1877611611202020145.

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39

Yang, Ruihong, Zhongguo Song, Jinsheng Zhang, and Xiaoli Xi. "A fast cold-start method of GPS receiver based on satellite orbit prediction." MATEC Web of Conferences 198 (2018): 06005. http://dx.doi.org/10.1051/matecconf/201819806005.

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Time to first fix (TTFF) is one of the crucial indicators to evaluate the performance of a GPS receiver. In this paper, an orbit prediction algorithm to reduce the TTFF of GPS receivers without a network connection is presented. Satellite orbit is predicted by numerically integrating the satellite’s equation of motion. Satellite’s initial position and velocity value, as well as the Earth’s polar motion parameters, used in prediction correspond to the locally collected previous broadcast ephemeris. As the solar radiation pressure (SRP) is one of the most critical factors causing orbit predictio

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40

Kim, Jeongrae, and Mingyu Kim. "ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites." International Journal of Aerospace Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/165178.

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For low earth orbit (LEO) satellite GPS receivers, space-based augmentation system (SBAS) ephemeris/clock corrections can be applied to improve positioning accuracy in real time. The SBAS correction is only available within its service area, and the prediction of the SBAS corrections during the outage period can extend the coverage area. Two time series forecasting models, autoregressive moving average (ARMA) and autoregressive (AR), are proposed to predict the corrections outside the service area. A simulated GPS satellite visibility condition is applied to the WAAS correction data, and the p

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41

Ma, Lihua, Xiaolan Wang, and Shengming Li. "Accuracy analysis of GPS broadcast ephemeris in the 2036th GPS week." IOP Conference Series: Materials Science and Engineering 631 (November 7, 2019): 042013. http://dx.doi.org/10.1088/1757-899x/631/4/042013.

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42

Wang, Jianmin, Yabo Li, Huizhong Zhu, and Tianming Ma. "Interpolation Method Research and Precision Analysis of GPS Satellite Position." Journal of Systems Science and Information 6, no. 3 (2018): 277–88. http://dx.doi.org/10.21078/jssi-2018-277-12.

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Abstract According to the precise ephemeris has only provided satellite position that is discrete not any time, so propose that make use of interpolation method to calculate satellite position at any time. The essay take advantage of IGS precise ephemeris data to calculate satellite position at some time by using Lagrange interpolation, Newton interpolation, Hermite interpolation, Cubic spline interpolation method, Chebyshev fitting method respectively, which has a deeply analysis in the precision of five interpolations. The results show that the precision of Cubic spline interpolation method

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43

Catchpole, Ivan, Peter Upton, Andrew Sinclair, and Jim Nagle. "Wide Area Differential GPS Field Study." Journal of Navigation 47, no. 2 (1994): 146–58. http://dx.doi.org/10.1017/s0373463300012066.

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Inmarsat commissioned the field study to be carried out by Signal Computing Ltd. in association with the Royal Greenwich Observatory. The study aimed to identify the commercial suitability of Wide Area Differential GPS (WADGPS) corrections. The corrections provided to users will be relayed via Inmarsat-3 geostationary satellites and are required to be valid over the footprint of an entire Inmarsat ocean region (approximately one third of the Earth's surface).The study has been conducted within the Inmarsat Atlantic Ocean Region East. Trials took place over a five-month period to achieve a repr

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44

Farah, Ashraf. "Variation of Static-PPP Positioning Accuracy Using GPS-Single Frequency Observations (Aswan, Egypt)." Artificial Satellites 52, no. 2 (2017): 19–26. http://dx.doi.org/10.1515/arsa-2017-0003.

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Abstract Precise Point Positioning (PPP) is a technique used for position computation with a high accuracy using only one GNSS receiver. It depends on highly accurate satellite position and clock data rather than broadcast ephemeries. PPP precision varies based on positioning technique (static or kinematic), observations type (single or dual frequency) and the duration of collected observations. PPP-(dual frequency receivers) offers comparable accuracy to differential GPS. PPP-single frequency receivers has many applications such as infrastructure, hydrography and precision agriculture. PPP us

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Rapinski, Jacek, Slawomir Cellmer, and Zofia Rzepecka. "Modified GPS/Pseudolite Navigation Message." Journal of Navigation 65, no. 4 (2012): 711–16. http://dx.doi.org/10.1017/s0373463312000124.

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One of the issues regarding integrated GPS/pseudolite measurements is how to deliver a pseudolite's position to a receiver or to post-processing software and how to manage it. This paper presents a proposed solution to this problem. The standard navigation message is modified in such way that without changing receivers (or post-processing software), the calculated position of a transmitter is fixed at a pseudolite's known position. The formulae for modification of standard Ephemeris Data are also derived. This algorithm can be implemented in a transmitter's firmware or a navigation data file c

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Pervan, B., and L. Gratton. "Orbit ephemeris monitors for local area differential GPS." IEEE Transactions on Aerospace and Electronic Systems 41, no. 2 (2005): 449–60. http://dx.doi.org/10.1109/taes.2005.1468740.

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Shu, Liu, Feng, Xu, Qian, and Yang. "Analysis of Factors Affecting Asynchronous RTK Positioning with GNSS Signals." Remote Sensing 11, no. 10 (2019): 1256. http://dx.doi.org/10.3390/rs11101256.

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For short baseline real-time kinematic (RTK) positioning, the atmosphere and broadcast ephemeris errors can be usually eliminated in double-differenced (DD) processing for synchronous observations. However, in the case of possible communication latency time, these errors may not be eliminated in DD treatments due to their variations during latency time. In addition, the time variation of these errors may present different characteristics among GPS, GLONASS, BDS, and GALILEO due to different satellite orbit and clock types. In this contribution, the formulas for studying the broadcast orbit and

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Zhang, Jason, Kefei Zhang, Ron Grenfell, and Rod Deakin. "GPS Satellite Velocity and Acceleration Determination using the Broadcast Ephemeris." Journal of Navigation 59, no. 2 (2006): 293–305. http://dx.doi.org/10.1017/s0373463306003638.

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Satellite velocity determination using the broadcast ephemeris is discussed and it is pointed out that the conventional rotation matrix method involves a complicated process of computation. This paper proposes an alternative method using a simple differentiator to derive satellite Earth-Centred-Earth-Fixed (ECEF) velocity from the ECEF satellite positions that are calculated using the standard ICD-GPS-200 algorithm. The proposed algorithm simplifies the velocity transformation procedure, and therefore provides a good alternative. It is demonstrated that ±1 mm/s per axis ECEF satellite velocity

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郭, 宋. "The Influence Analysis of GPS Broadcast Ephemeris Fitting and Fitting Epoch Number." Geomatics Science and Technology 04, no. 03 (2016): 100–107. http://dx.doi.org/10.12677/gst.2016.43012.

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Wang, Ahao, Junping Chen, Yize Zhang, Jiexian Wang, and Bin Wang. "Performance Evaluation of the CNAV Broadcast Ephemeris." Journal of Navigation 72, no. 5 (2019): 1331–44. http://dx.doi.org/10.1017/s037346331900016x.

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The new Global Positioning System (GPS) Civil Navigation Message (CNAV) has been transmitted by Block IIR-M and Block IIF satellites since April 2014, both on the L2C and L5 signals. Compared to the Legacy Navigation Message (LNAV), the CNAV message provides six additional parameters (two orbit parameters and four Inter-Signal Correction (ISC) parameters) for prospective civil users. Using the precise products of the International Global Navigation Satellite System Service (IGS), we evaluate the precision of satellite orbit, clock and ISCs of the CNAV. Additionally, the contribution of the six

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