Спутник связи. Fedsat. [Редактировать]

FedSat – экспериментальный космический аппарат связи. Среди решаемых задач особо выделяются:

  • Фундаментальное исследование структуры и динамики ионосферы, экзосферы и внутренней плазменной оболочки планеты с использованием наблюдений магнитного поля и свойств распространения радиосигналов.
  • Исследование динамики области эквипотенциальных токов и волокнистых структур в зонах, вызываемых полярными сияниями.
  • Исследование колеблющихся волновых областей и их вариабельности в ионосфере и экзосфере, включая гидродинамические волны сверхнизкой (1 мГц – 5 Гц) частоты и «циклотронные волны» низкой частоты, совмещенное с наблюдениями наземной станции в Антарктиде.
  • Мониторинг и картографирование геомагнитного поля Австралийского региона.

Дополнительные наименования

#НаименованияПоиск в новостяхПоиск в документах
127598НайтиНайти

Дополнительная классификация

#Наименования
1Страна оператор(владелец) - Австралия
2Страна производитель - Австралия
3Тип оператора(владельца) - государственный
4Все спутники связи

Технические характеристики

#ХарактеристикаЗначение
1Масса, кг50

Характеристики орбиты

#ХарактеристикаЗначение
1Наклонение, град98.3
2Апогей, км811.3
3Перигей, км797.4
4Период, минут100.8
5Длинный диаметр эллипса, км7175

Пусковые характеристики

#ХарактеристикаЗначение
1Код NSSDC2002-056B

Экономические характеристики

#ХарактеристикаДата измеренияЗначение
1Стоимость (аппарат), млн. долл.11.2
2Стоимость (аппарат), млн. долл.11

Информация об удачном запуске

#ХарактеристикаЗначение
1Космодром Танегасима
2Дата пуска2002-12-14 at 01:31:00 UTC
3Полезная нагрузка 1xADEOS 2
4Полезная нагрузка 1xFedsat
5Полезная нагрузка 1xWEOS
6Полезная нагрузка 1xMicro-labsat
7Ракета-носитель 1xH2A202

Найдено 163 документов по запросу «Fedsat». [Перейти к поиску]


Дата загрузки: 2016-11-05
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0.05/5
... FAST FASTRAC FastSat FBM FeatherCraft Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Fedsat Feng Yun Feng Yun 3 Feng...



Дата загрузки: 2016-12-25
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0.21/5
... the operational needs of the FedSat mission. FedSat is the first Australian... four practical issues regarding the FedSat mission and operations. First, unlike... analysis methods and results. Second, FedSat supports Ka-band tracking experiments... 1 Introduction 1 1.1 Orbit determination 1 1.2 Orbit representation 3 1.3 Fedsat Missions and orbit determination problems... 19 Chapter 3 Accuracy dependencies of FedSat orbit propagation on operational modes... FedSat mission 40 4.4 Experimental results 41 4.5 Summary 47 Chapter 5 Improvement of FedSat onboard navigation solutions 48 5.1 The problem of FedSat onboard navigation solutions 48 5.2 FedSat in-orbit performance 48 5.3 Improvement of FedSat... representation 5 1.3 FedSat 7 1.4 FedSat flying a Sun synchronised orbit 7 1.5 BlackJack GPS receiver onboard FedSat 8 2.1 Earth... ranging errors 50 5.4 Illustration of FedSat onboard navigation errors 52 5.5 The... values from satellite missions and FedSat mission against elevation angles. 51... (6X6) 65 Table 6.3 Summary of FedSat orbit characteristics and computing schemes... arc. 5 Chapter 1 1.3 FedSat missions and orbit determination problems FedSat is the first... 1.4 shows FedSat flying in a sun-synchronised orbit. Since the launch, FedSat has... in navigation and satellite tracking. FedSat flies a dual-frequency GPS receiver... UHF Antennas Figure 1.3. FedSat O rb it N o rm Figure 1.4. FedSat flying a sun synchronized... the FedSat mission, with focus on the engineering needs for FedSat orbits... the author’s contribution. • Development of FedSat orbit interpolation software based on... evaluation of the NORAD 8 Chapter 1 FedSat TLE accuracy. The research experimentally...-based LEO orbit determination and FedSat observation techniques are emphasised. Chapter... conducted before the launch of FedSat. Chapter 4 describes the orbit representation... of FedSat onboard navigation solutions and the characteristics of the FedSat orbital performance are discussed. An experimental analysis of the FedSat... method for improvement of the FedSat navigation solution are introduced. Chapter... the orbit determination problems for FedSat mission. From the measurement systems... dependencies of FedSat orbit propagation on operational modes 3.1 Introduction Fedsat is a low... the orbit: ∆r = ∆β • π 180 • ρ (β ) (3.1) Range to FedSat: ρ ≥800km Allowed pointing error (∆β=0.01deg... prototype for routine operations of FedSat orbit production. Additional development of... an orbit determination prototype for FedSat engineering applications that can operate... covariance analysis 3.3.1 Cases of study FedSat would obtain its state (position... I are investigated. Table 3.1 lists the FedSat orbit characteristics and force models... research objectives. Table 3.1. Summary of FedSat orbit characteristics and force models.... Therefore, EGM96_80x80 is appropriate for FedSat prediction. 29 Chapter 3 Figure 3.13... and FedSat orbit. It is evident that 3D RMS errors of FedSat... Post-launch FedSat in-orbit performance demonstrates that the FedSat 3D RMS... scientific satellite FedSat was successfully launched on 14 December 2002. FedSat is... [39]. 4.3 The software structure for FedSat mission Tracking station 1.Subject: Latitude... the Cheybshev polynomial interpolation for FedSat orbital representation. The experimental results... to the FedSat mission. 47 Chapter 5 Chapter 5 Improvement of FedSat onboard navigation solutions 5.1 The problem of FedSat onboard navigation... GPS. 5.2 FedSat in-orbit performance The GPS antenna on FedSat is looking... for atmospheric occultation studies [40]. FedSat GPS measurement quality The quality... Chapter 5 Not visible FedSat orbit determination 90 deg FedSat GPS occultation 25... FedSat case, the following was observed: • The overall RMS of the FedSat... Mission CHAMP SAC-C Topex Poseidon FedSat FedSat Receiver /antenna BlackJack Up-looking... (±5m) Quality of FedSat onboard navigation solutions The FedSat Orbit Determination and... cases respectively. 51 Chapter 5 • The FedSat ONS uncertainties are approximately three... FedSat onboard navigation solution errors, differences between FedSat daily FODT filtering and FedSat... data arcs [41] 5.3 Improvement of FedSat navigation solutions with geometric methods... compatibility with the Keplerian elements. FedSat ground operations depend on the....NNNNNNNNNNNNNN Example for Fed Sat: FEDSAT 1 27598U 02056B 03346.12531011 .00000038... measurements As mentioned previously, the FedSat operation depends on NORAD TLE... to create TLE from the FedSat navigation solutions, or predicted x, y, z solutions... I 66 Chapter 6 Table 6.3. Summary of FedSat orbit characteristics and Computing Schemes... analyses. • through the research efforts. FedSat onboard payload supports Ka-band.../sunni/missions.htm [32] Y. Feng, “FedSat Orbit Determination: Duty Cycle Operations... [33] Y. Feng, “Experimental Studies of FedSat Orbit Accuracies with Topex/Poseidon..., July 2003. [41] Y. Feng, N., Zhou, “FedSat Orbit Determination Strategies and Results...



Дата загрузки: 2016-12-24
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0.1/5
..., SNR, single antenna, FedSat. Introduction The Federation Satellite (FedSat) is a low cost... the successful launch of the FedSat in December 2002, it has... the main requirements of the FedSat project is the provision of..., the single antenna configuration of FedSat provides an excellent test platform... consist of three varying components, FedSat receiving gain (Gr), path losses.... After that, descriptions on the FedSat operating environment, where data were... GPS signal transmission model results. FedSat Receiving Gain Single antenna systems... the receiving antenna gain, the FedSat antenna (S671575-14) was tested... in Fig 3, the antenna of FedSat is mounted on the negative... the spacecraft. This configuration allows FedSat to conduct upper atmosphere analysis.... FedSat Antenna Fig. 3: FedSat GPS antenna mounting configuration The antenna used in FedSat...° and 135°-315°. The measured FedSat spherical antenna gain pattern is... transmission model result section. Fig. 6: FedSat spherical antenna gain pattern, view... [16]. Since the orbit of FedSat is at an altitude of... distance travelled. GPS Satellite LOS FedSat Theta angle θ Earth Fig. 11... will be reconstructed using the FedSat data and the precisely measured...) vector between GPS satellite and FedSat, shown in Fig. 11. Rearranging... and FedSat in ECEF coordinates; 2. Transform the LOS vector to FedSat Local Level coordinate using FedSat position and velocity... FedSat body coordinate using the attitude information available; 4. LOS vector in FedSat... and off-boresight angle in FedSat body coordinates In addition to... model is based on the FedSat data collected during 30/12... noise ratio in dB.Hz. 2. FedSat attitude information. 3. Position and Velocity... of GPS satellites tracked by FedSat GPS receiver were between 5 and... to compute the position of FedSat due to the number of... 5 6 7 4 x 10 Fig. 14: GDOP for FedSat data – 30/12/02 to.... 15: PCHIP interpolation of the FedSat GPS sperical antenna gain pattern... receiver by penetrating through the FedSat surface. As a result, large modelling... negative velocity pointing antenna of FedSat, some parts of view in... tested in a platform similar to FedSat where the antenna boresight is... of FedSat. Thus, a new single antenna attitude system is proposed for FedSat.... Comparison of FedSat Attitude Results The result of FedSat attitude estimation is... attitude system estimation Fig. 21: FedSat attitude estimation using JPL approach... satellites being tracked by the FedSat GPS receiver. Results have shown... signal was due to the FedSat antenna configuration. Table 2: Performance of... created with data collected by FedSat from 30/12/02 to... angle calibration results. Fig. 23: FedSat attitude estimation using SNR mapping... new proposed attitude system for FedSat is based on the spherical... SNR mapping approach. Fig. 24: FedSat attitude estimation using spherical antenna... [1, 3, 9]. This is caused by the FedSat antenna configuration in the negative... on the data collected by FedSat, a GPS signal transmission model was... of parameters such as the FedSat receiving antenna gain pattern, path... GPS transmitting power differences. The FedSat receiving antenna gain used was... this was caused by the FedSat antenna configuration and ionosphere path... negative velocity pointing antenna of FedSat had a severe impact on the... in the development of the FedSat GPS payload. Mr. William Keller... an excellent work in the FedSat Antenna Tests. Finally, thanks for..., "Single Antenna Attitude Determination for FedSat With Improved Antenna Gain Patterns... Congress, Brisbane, 2003. [10] W. Kellar, "FedSat Antenna Pattern Test Report," Cooperative...



Дата загрузки: 2016-12-24
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0.1/5
...) Single Antenna Attitude Determination for FedSat. In Proceedings Institute of Navigation... Single Antenna Attitude Determination for FedSat Mr Charles Wang, Cooperative Research... the FedSat GPS payload manager in the CRC for Satellite systems FedSat... geosynchronous altitudes and above. Abstract FedSat is the first satellite to... the GPS receiver on the FedSat mission, are to provide an... FedSat, an outline of the antenna gain pattern tests performed for FedSat... also involved in the The FedSat program began approximately 5 years ago... of the original requirements of FedSat was that a GPS receiver function... not a suitable solution for FedSat. Figure 1 - FedSat Mounted on the Panel Fixture.... The green circle highlights the FedSat flight GPS antenna, with the... Campaign Since the launch of FedSat is still imminent an experimental... 4. Figure 2 - This is a photograph of FedSat just prior to final integration... FedSat have been laid flat in this configuration. Attitude Determination on FedSat... type of performance required for FedSat. Simplified Attitude Solution A simpler approach... and Figure 21. The FedSat Antenna Configuration FedSat’s antenna is mounted on... SNR of 45dBHz. Figure 22 - FedSat GPS Antenna Mounting Configuration with... 23 - FedSat GPS Antenna Location (Second View) Figure 24 - FedSat GPS Antenna...-14 A mock-up model of FedSat was constructed (called TinSat) to...-based Attitude Determination for the FedSat Antenna It has been sent... not true for the measured FedSat flight antenna. Consider Figure 30... the negative velocity plane of FedSat, there has been a great modification... negative velocity vector face of FedSat (azimuths 180º to 270º from... SNR-based approaches for the FedSat mission another approach is required... in the development of the FedSat GPS payload. We take the.... Figure 33 - 3D Representation of FedSat Antenna Gain Pattern Conclusions This... single antenna attitude determination for FedSat. During this analysis it has... for a decrease in elevation angle. FedSat does not have a suitable antenna...



Дата загрузки: 2016-12-24
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0.1/5
..., 15 deg rms from the FedSat satellite negative velocity pointing antenna... reflected signal, a replicate of the FedSat micro-satellite was tested in... of the same dimension of FedSat (50 cm x 50 cm x 50... the same as used in FedSat, it is assumed that the... for the use of the FedSat mission data for system performance... B Fig. 8 PCHIP interpolation of the FedSat GPS 3D antenna gain pattern... receiver by penetrating around the FedSat surface. As a result, large modeling... first dataset is the actual FedSat flight data (from 30/12... 28/02/2003). The reference FedSat attitude information is obtained from... TinSat in a zenith pointing configuration. A. FedSat Flight Data Figure 15 shows... and the reference attitude of FedSat. As shown in fig. 15... satellites. The negative velocity pointing FedSat antenna results in uneven distribution... degraded performance. 17 Fig. 15 FedSat attitude estimation error using the... angle calibration results. Fig. 17 FedSat attitude estimation error using the... 15.24 deg. Fig. 18 FedSat attitude estimation error using Wang...,3,9. This is caused by the FedSat antenna configuration in the negative.... Compared to results achieved for FedSat flight data, slight improvements in... approach Axelrad approach Wang approach FedSat flight data – rms error (deg... evaluated. Results from the actual FedSat flight data have shown a degraded... non-uniform ground plane of FedSat. On the other hand, the... of 15 deg rms for FedSat flight data and 10 deg... in the development of the FedSat GPS payload. Mr. William Keller... an excellent work in the FedSat Antenna Tests. Finally, thanks for..., “Single Antenna Attitude Determination for FedSat With Improved Antenna Gain Patterns..., Inc. 209-244. 12 Kellar, W., “FedSat Antenna Pattern Test Report”, 2002...



Дата загрузки: 2017-04-23
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0.14/5
... examples of international collaborations include: • FedSat, launched in 2003, led to... linked or managed together (TIGER, FedSat, and HyShot are exceptions), either... are detailed in Section I.3, including FedSat, the TIGER radars, the AATSR... t ($ Million) Annual Salaries ($ Million) Australia’s FedSat satellite was launched in December... R unning C os t ($ being analyzed extensively. FedSat’s replacement cost is estimated to... and a riometer) and on the FedSat spacecraft (magnetometer) and AAD instruments... Status of Australian Space Science FedSat, ionospheric tomography, and changes during... Orbiting (LEO) satellites such as FedSat, which orbits at 800 km... as a consequence of geomagnetic storms. FedSat provided the first tomographic images... to the plasmasphere (Figure II.4.4). FedSat data are being used systematically... Electron Density (x104 el/cm3) FedSat pass on 16/12/03... by the GPS receiver on FedSat. It shows an enhanced ionization... CRC for Satellite Systems and FedSat satellite18, which graduated at least... data, first pioneered by Australia’s FedSat; • reception of beacon signals for... exceptional track record of the FedSat satellite, a minimum of 120 PhD... envisaged for Marabibi relative to FedSat. Recommendation 9: Australia should develop a long...



Дата загрузки: 2016-12-24
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0.12/5
... July 2003 Orbit determination of FedSat based on GPS receiver position... 2002, the Australian small satellite FedSat was launched with a Japanese HII... on-board FedSat. PAPER 69 (peer-reviewed) 1 The results of FedSat orbit... Principle of Satellite Orbit Determination 3. FEDSAT ORBIT DETERMINATION CONCEPT BASED ON... the GPS receiver on-board FedSat are expressed in the Earth... Position Solutions Position Solutions Generate FedSat Reference Orbit Calculate GPS Positions... Statistical Information OD Solution Figure 2: FedSat orbit determination process based on... receiver solution data in the FedSat orbit. The measurements result from... conditions of FedSat. North GPS Receiver Position Solutions Figure 3: FedSat GPS measurements... BlackJack GPS receiver on-board FedSat are shown in Figure 4. The... Time [h] Figure 4: Residuals between calculated FedSat positions based on a precise orbit... GPS BlackJack receiver on-board FedSat Epoch (UTC): 2003/04/04....93 - - 3-D Position [m] - 40.35 - Table 2: FedSat Orbit Determination results based on... satellite orbit model for the FedSat reference orbit prediction PAPER 69... 2, the achieved position accuracy for FedSat, based on GPS receiver position.... The achieved 3-D position accuracy (1 σ) for FedSat based on this method is... the Australian small satellite mission – FedSat. The processed BlackJack GPS receiver... Y, Zhou N (2003) Orbit Determination of FedSat based on GPS Receiver Position... Y, Zhou N, Enderle W, Walker R (2003) Improving FedSat Real Time Orbit Solutions with...



Дата загрузки: 2017-06-15
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0.12/5
... the authors of this paper. FedSat: Satellite Communications In 2001, the... thirty years in the initiative! FedSat, a research satellite weighing 50 kg..., magnetic field measurements, profiling COMMUNICATION (FEDSAT) the earth’s atmosphere and testing... Satellite Systems (CRCSS); responsible for FedSat’s design, manufacture, launch and operation... have been undertaken within the FedSat framework. In 2000, two projects... control, monitoring and communication with FedSat. One team of 3 students designed... the ground station of the FedSat project (Fig. 2). In the FINAL... STUDENTS WITH ONE OF THE FEDSAT ANTENNAS latter case, although both... [3] Tovirac,B, Verringer, J, “Tracking Antennas for FedSat and Merlion”, Final Year Project...



Дата загрузки: 2017-10-09
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0.29/5
... examples of international collaborations include: • FedSat, launched in 2003, performed excellent... linked or managed together (TIGER, FedSat, and HyShot are exceptions), either... are detailed in Section I.3, including FedSat, the TIGER radars, the AATSR... a factor of 10 higher. Australia’s FedSat satellite was launched in December... analysed extensively, until July 2007. FedSat’s replacement cost is estimated to... and a riometer) and on the FedSat spacecraft (magnetometer); and AAD instruments... 2005 solar proton event. 40 FedSat, ionospheric tomography, and changes during... Orbiting (LEO) satellites such as FedSat which orbits at 800 km... as a consequence of geomagnetic storms. FedSat provided the first tomographic images... to the plasmasphere (Figure II.4.6). FedSat data are being used systematically... by the GPS receiver on FedSat. It shows an enhanced ionization... exceptional track record of the FedSat satellite, a minimum of 230 additional... exceptional track record of the FedSat satellite, a minimum of 50 PhD... envisaged for Lightning relative to FedSat should increase these by at...



Дата загрузки: 2016-12-24
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0.12/5
..., Apollo, PVO 2.3.2 Galileo 2.3.3 Polar 2.3.4 FAST 2.3.5 FedSat 2.3.6 Ground-based magnetometers 2.4 Magnetometer Design...-based magnetometer programs at UCLA 5 3. FedSat Engineering Unit showing electronics board... August 1996, and that on FedSat launched in 2002, are simplified..., formed the basis of the FedSat and ST5 designs. The FAST... for “full-field” operations. 2.3.5 FedSat The FedSat magnetometer uses the highly successful...-based effort. Figure 3 shows the FedSat engineering unit. The magnetometer has... more precise and accurate. Figure 3. FedSat engineering unit showing electronics board... Name ISEE Galileo Polar FAST FedSat Ranges [nT] 8000, 556 16... circuit was used successfully on FedSat. As part of our development... EMI ERG EU FAC FAST FedSat FPGA fo FU FY GEO...