An attitude and orbit determination and control system for a. Orbit determination accuracy improvement for geostationary. Geostationary orbit determination using satre sciencedirect. The issue analyzed in this paper is the singularity associated with the simultaneous estimation of the satellites position and azimuth bias using tracking data from a single ground station when it is located near the longitude of the ground control. Therefore, an orbit determination od filter is needed to. In all these missions, satellite orbit determination is used for geo locationof the satellite sensors on one hand and to measure the gravity eld and its variations in time on the other hand, i. Its primary service area will cover the indian subcontinent and extend by about 1500 km around its political borders. Biography j d kronman is a senior systems engineer for the defense systems division of trw, inc. Correlation and orbit determination of space objects based on. Sep 01, 2011 third, combined orbit determination for low earth orbit satellite and high earth orbit satellite visser and ambrosius, 1997, it can overcome the geometric limitations of tracking nets. Third, combined orbit determination for low earth orbit satellite and high earth orbit satellite visser and ambrosius, 1997, it can overcome the geometric limitations of tracking nets. Beidou geo satellite 201a was observed to study orbit determination of a geo satellite with cband observations during september 12 and 14, 2011 by ntsc national time service center, which uses caps with 3 cband stations located in. A new orbit determination method uniting data before, among and after maneuver is researched, cband transfer ranging data and telemetry and telecontrol parameters during satellite maneuver are used together.
Improvement of orbit determination for geostationary. And most of the simulation period time, under the condition of the dm level orbit determination for geo igso satellites, the position accuracy of the relative orbit determination is better than 4 m, the horizontal accuracy of the relative orbit determination is within 2. Improvement of orbit determination for geostationary satellites with. Dec 28, 2008 orbit determination of geostationary satellite during maneuvers li, min 20081228 00. Satellite orbit determination using a singlechannel global. Extended kalman filter ekf was used as orbit determination algorithm for geo and gso. Orbit determination of korean geo satellite using single. A method to precisely estimate the azimuth bias for the geostationary satellite is introduced and evaluated with orbitdetermination results. Validation of geostationary satellite orbit determination. An object in such an orbit has an orbital period equal to the earths rotational period, one sidereal day, and so to. Orbit determination of geostationary satellite during. Orbit determination methods for a geostationary geo satellite are introduced. A neural network state observer was designed to estimate the state of the geo satellite, with only the intersatellite ranging information as observations. Observations from n hours before the maneuver to 2 h after the maneuver are used to perform orbit determination.
In this contribution, we develop an integrated orbit determination of fy. Research article integrated design of autonomous orbit determination and orbit control for geo satellite based on neural network youtao gao,1 zhicheng you,1 and bo xu 2 1school of astronautics, nanjing university of aeronautics and astronautics, nanjing 210016, china 2school of aeronautics and astronautics, sun yatsen university, guangzhou 510275, china. The orbit determination strategy differs dependent on the choice of n. On the other hand, whenever the orbit is such that the satellite periodically enters the shadow of the earth. The orbit determination algorithm can be used to help the orbit prediction algorithm to improve the accuracy of the predicted state of the satellite.
Kinematic precise orbit determination for gravity field. The orbit of a geo satellite can be determined as follows. The synchronization of rotation and orbital period means that, for an observer on earths surface, an object in geosynchronous orbit. This paper uses the vlbi delay and delayrate data, in combination with cband ranging data, to determine the geo satellite s orbit. Given at least three observations of a solar system body, his method consists of two steps. In order to improve the autonomy of a maneuvered geo satellite which is a member of a navigation satellite system, an integrated design method of autonomous orbit determination and autonomous control was proposed. Object correlation and orbit determination for geostationary satellites. Irnss orbit determination and broadcast ephemeris assessment. Multisatellite determination of the relativistic electron. The orbit determination algorithm modifies the state of the satellite at the start of the orbit prediction. Orbit determination and prediction of geo satellite of beidou. Investigation on geo satellite orbit determination based on cei measurements of short baselines volume 72 issue 6 zejun liu, lan du, yongxing zhu, zhihan qian, jinqing wang, shiguang liang. A geosynchronous orbit sometimes abbreviated gso is an earthcentered orbit with an orbital period that matches earths rotation on its axis, 23 hours, 56 minutes, and 4 seconds one sidereal day.
As a demonstration, the chinese vlbi network organized a tracking and orbit determination experiment for a geo navigation satellite lasting 24 h. Interferometric orbit determination for geostationary satellites. The indian regional navigation satellite system irnss is an independent navigation system that will be made up of seven satellites in inclined geosynchronous orbit igso and geostationary earth orbit geo 1. Geosynchronous satellite use of gps ohio university. Sequential orbit determination tool for geostationary. This is due to the geo orbit determination suffers clearly from the weak observation geometry and the lack of orbit dynamics. This paper uses the vlbi delay and delayrate data, in combination with cband ranging data, to determine the geo satellites orbit. Integrated design of autonomous orbit determination and orbit. Geostationary earth orbit geo korea multipurpose satellite kompsat2b gk2b is a korean geostationary earth orbit geo satellite that is scheduled to be launched in 2020 for meteorological and ocean monitoring. Statistical orbit determination for geostationary and. Gnss geo satellites precise orbit determination based on.
Sequential orbit determination tool for geostationary satellites operations alberto agueda mate, luigi strippoli, javier cuesta cabanas and francisco m. The residual root mean square rms of each site and pod are analysed with orbit difference over overlaps of adjacent orbit arcs. As a demonstration, the chinese vlbi network organized a tracking and orbitdetermination experiment for a geo navigation satellite lasting 24 h. An attitude and orbit determination and control system for a small geostationary satellite by g. According to the analysis results, the onboard receiver can track 68 gps satellites, and the minimum and maximum carrier to noise spectral. National time service center, chinese academy of s. The motion of geo satellites relative to a ground tracking station is almost fixed, and regular orbit maneuvers are necessary to maintain the satellites allocated. The characteristics of the transfer ellipse and the total. Aug 29, 2018 geostationary earth orbit geo korea multipurpose satellite kompsat2b gk2b is a korean geostationary earth orbit geo satellite that is scheduled to be launched in 2020 for meteorological and ocean monitoring. The individual results of the four meos are more homogeneous than the others, which are related to our orbit modelling experiences for this kind of satellites. Thopil thesis presented in partial fulfilment of the requirements for the degree of master of science in electronic engineering at the university of stellenbosch december 2006 supervisor. Pdf precise orbit determination for geostationary satellites with. In order to control or model the thrust force, a kalman filter based on dynamic model compensation is proposed for. Current missions at geo altitude mainly use traditional ranging for orbit determination.
Precise orbit determination of bds meo satellites based on. Orbit determination of korean geo satellite using single slr. Orbit determination is not a wellknown task in satellite geodesy. Introduction the increasing number of space debris objects, together with the risk associated for the active space missions, has as main consequence an increase of the workingload for the infrastructures dedicated to the space debris cataloging and orbit maintenance. A maneuvered geo satellite orbit determination using robustly. Orbit determination and prediction of geo satellite of. Orbit determination methods ceres was recovered in 1802 by h. However, predicting the orbital parameters for geostationary earth orbits with zero inclination and for geosynchronous satellite orbits gso with small inclination. Jun 27, 2018 this study analyzes the quality of onboard data of tracking signals from gps satellites on the far side of the earth and determines the orbit of the geostationary satellite using code and carrier phase observations with 30h and 3day orbit arc length. Experience using gps for orbit determination of a geosynchronous satellite j. A geostationary orbit, also referred to as a geosynchronous equatorial orbit geo, is a circular geosynchronous orbit 35,786 kilometres 22,236 miles above earths equator and following the direction of earths rotation. Tjs2 geostationary satellite orbit determination using. A close proximity twospacecraft formation with bounded orbits is presented to demonstrate the tdoa and fdoa od capabilities.
Kalman filterbased orbit determination with dynamic model. Integrated design of autonomous orbit determination and. Pdf orbit determination of korean geo satellite using. Geo geo stationary earth orbit meo medium earth orbit leo low earth orbit and. Orbit determination of korean geo satellite using single slr sensor article pdf available in sensors 189. Evaluation of cband precise orbit determination of. Pdf a new precise orbit determination pod strategy based on the combination of satellite laser ranging slr and cband transfer ranging. As a result, it is very difficult to use geo satellite for navigation application purpose. Gauss determined an orbit with piazzis observations. Investigation on geo satellite orbit determination based on. A new dynamic orbit determination method for geo satellite.
A twoway adaptive kalman filter is proposed by combining a twoway filter with an adaptive filter for orbit determination of a maneuvered geo satellite. Martinez fadrique gmv, isaac newton 11, 28760 tres cantos, spain the orbit determination for geostationary satellites has been traditionally performed using batch processes. Precise orbit determination of beidou satellites at gfz. It transmitted the first television signal to cross the pacific ocean when it relayed the 1964 summer olympics from tokyo, japan to viewers in the united states 8. In this paper, a smallscale cei system of two orthogonal baselines 75 m. In order to control or model the thrust force, a kalman filter based on dynamic model compensation is proposed for the orbit determination of a maneuvered geo satellite.
Animation showing geosynchronous satellite orbiting the earth. Gpsbased navigation and orbit determination for the amsat ao40 satellite george davis emergent space technologies, llc michael moreau, russell carpenter, frank bauer nasa goddard space flight center abstract the amsat oscar40 ao40 spacecraft occupies a highly elliptical orbit heo to support amateur radio experiments. The next section describes some of the innovations in the navigator receiver. How to recover orbit rapidly for geo in beidou system bds based on shortarc tracking is the key factor. With changing mission requirements and the increase in the number of geo missions, utilizing gps signals is becoming an increasingly attractive alternative for position and timing determination. All radio and tv, whether satellite etc, are launched in this orbit. Mar 01, 20 experimental study on the precise orbit determination of the beidou navigation satellite system lina he, 1, 2, maorong ge, 2 jiexian wang, 1 jens wickert, 2 and harald schuh 2 1 department of surveying and geo informatics, tongji university, shanghai 200092, china. Geostationary earth orbit geokorea multipurpose satellite kompsat2b gk2b is a korean geostationary earth orbit geo satellite that is scheduled to be launched in 2020 for meteorological and ocean monitoring. To improve the accuracy of the orbit determination for geo satellites, a series of theoretical research and experiments has been performed by researchers.
A proposed satellite orbit determination system has been analyzed, one that uses measurements from a singlechannel global positioning system gps receiver. The purpose of this study is to predict the likely efficacy of a lowpower autonomous orbit determination system. Experiment of orbit determination and prediction during repositioning maneuver and short arc orbit. Heo highly elliptical orbit these satellites have almost a distance of 36,000 km to the earth. Coarse initial orbit determination for a geostationary satellite using. If n is 2 or 4, three initial position, three initial velocity, one solar radiation coefficient and three maneuver acceleration coefficients of the three. It is possible to cover almost all parts of the earth with just 3 geo satellites.
Relative orbit determination of multiple satellites using. Accurate orbit determination for geostationary spacecraft poses particular problems for the very same reason that these orbits are used, namely the geometry of the. This is most likely indicative of poor satellite geometry at geo. Pdf investigation on geo satellite orbit determination based on. A communication satellite was carried by the space shuttle into low earth orbit leo at an altitude of 322 km and is to be transferred to a geostationary orbit geo at 35, 860 km using a hohmann transfer.
Experimental study on the precise orbit determination of the. Gnss geo satellites precise orbit determination based on carrier phase and slr observations baoqi sun1,2, hang su1,2, zhe zhang1,2, yao kong1,2,3, xuhai yang1,2 1. A method of using newtons highresolution differential formula and polynomial fitting for modeling the thrust force of a maneuvered geo satellite is developed. Precise orbit determination pod using cband pseudorange observation of geo satellite 201a in july 2012 has been conducted. Application to geomagnetic storm times, manuscript in preparation for journal of geophysical research, 2005, hereinafter referred to as chen et al.
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