基于STK的“GPS星座对HEO卫星的导航分析”（非几何可见性、导航精度）

共187个文件

sa3：45个

sa：45个

x3：41个

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在本分析中，我们将深入探讨基于STK（Satellite Tool Kit）进行的“GPS星座对HEO（ Highly Elliptical Orbit）卫星的导航分析”。STK是一款强大的航天工程软件，广泛应用于航天器轨迹模拟、通信链路分析以及天基传感器性能评估等领域。HEO卫星因其特殊的椭圆轨道特性，使得其与GPS星座之间的几何关系相对复杂，从而影响到导航的可用性和精度。我们要理解非几何可见性这一概念。在GPS导航系统中，卫星与接收机之间必须保持视线连接才能进行有效通信。对于HEO卫星来说，由于其轨道高度变化大，可能会出现部分时间无法看到全部或某些GPS卫星的情况，这被称为非几何可见性。当HEO卫星进入地球阴影或被地球遮挡时，非几何可见性问题更为突出，可能导致导航信号中断，影响导航性能。导航精度是衡量GPS导航系统性能的关键指标。在HEO卫星的情况下，由于轨道高度和倾角的变化，卫星接收机接收到的信号会受到多路径效应、电离层延迟和对流层延迟等多种因素的影响，导致导航误差增加。STK可以通过精确的模型和算法来模拟这些效应，从而分析HEO卫星的导航精度，找出最优的信号接收策略。在“HEOto24GPS”这个文件中，可能包含了对HEO卫星与24颗GPS卫星（通常GPS星座由24颗工作卫星组成）之间相互作用的详细模拟数据。这些数据可以用于分析不同时间点上HEO卫星能接收到的GPS卫星数量、信号强度、以及由此产生的定位误差。通过这些分析，我们可以评估HEO卫星在不同轨道位置上的导航性能，为HEO卫星的设计和操作提供关键参考。 STK的高级功能允许用户定义自定义的误差模型，比如考虑星载钟误差、轨道误差等，以更准确地预测导航性能。此外，STK还支持多星座融合导航，例如结合GLONASS、Galileo等其他全球导航卫星系统，以提升HEO卫星在非几何可见性条件下的导航能力。基于STK的“GPS星座对HEO卫星的导航分析”是一项深入研究HEO卫星导航性能的重要工作，它涉及到轨道动力学、信号传播模型、误差分析等多个方面。通过对“HEOto24GPS”文件的详尽解析和解读，我们可以得到关于HEO卫星在不同环境条件下如何利用GPS星座进行精确导航的宝贵信息，为未来HEO卫星的设计和应用提供科学依据。

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基于STK的“GPS星座对HEO卫星的导航分析”（非几何可见性、导航精度）（187个子文件）

24GPS_and_others.cn 3KB

Constellation2.cn 2KB

24GPS.cn 2KB

Receiver221.r 11KB

Receiver21.r 11KB

Receiver22.r 11KB

Receiver2.r 11KB

Receiver21.r3 4KB

Receiver221.r3 4KB

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Receiver22.r3 4KB

LTO.sa 461KB

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GTO24hours.sa 458KB

GTO48hours.sa 458KB

GPS_BIIR-02_24876.sa 20KB

GPS_BIIA-28_25030.sa 20KB

GPS_BIIA-27_24320.sa 20KB

GPS_BIIA-25_23833.sa 20KB

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GPS_BIIA-26_23953.sa 20KB

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GPS_BIIR-05_26407.sa 20KB

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GPS_BIIR-07_26690.sa 20KB

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0_BEIDOU_IGSO_2_37256.sa3 20KB

GTO16hours.sa3 20KB

0_BEIDOU_M6_38775.sa3 20KB

0_BEIDOU_IGSO_5_37948.sa3 20KB

GTO48hours.sa3 20KB

0_GALILEO-FM4_38858.sa3 20KB

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0_BEIDOU_IGSO_1_36828.sa3 20KB

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0_BEIDOU_G5_38091.sa3 20KB

0_BEIDOU_IGSO_4_37763.sa3 20KB

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0_BEIDOU_G3_36590.sa3 20KB

0_BEIDOU_G6_38953.sa3 20KB

0_BEIDOU_M5_38774.sa3 20KB

LTO.sa3 20KB

0_GALILEO-FM2_37847.sa3 20KB

0_GALILEO-PFM_37846.sa3 20KB

GPS_BIIR-06_26605.sa3 20KB

GPS_BIIR-12_28361.sa3 20KB

GPS_BIIR-07_26690.sa3 20KB

GPS_BIIR-08_27663.sa3 20KB

GPS_BIIR-05_26407.sa3 20KB

GPS_BIIR-03_25933.sa3 20KB

GPS_BIIR-09_27704.sa3 20KB

GPS_BIIR-02_24876.sa3 20KB

GPS_BIIR-11_28190.sa3 20KB

GPS_BIIR-10_28129.sa3 20KB

GPS_BIIR-13_28474.sa3 20KB

GPS_BIIR-04_26360.sa3 20KB

GPS_BIIA-27_24320.sa3 20KB

GPS_BIIA-24_23027.sa3 20KB

GPS_BIIA-16_22231.sa3 20KB

GPS_BIIA-21_22700.sa3 20KB

GPS_BIIA-14_22014.sa3 20KB

GPS_BIIA-25_23833.sa3 20KB

GPS_BIIA-11_21552.sa3 20KB

GPS_BIIA-10_20959.sa3 20KB

GPS_BIIA-26_23953.sa3 20KB

GPS_BIIA-23_22877.sa3 20KB

GPS_BIIA-28_25030.sa3 20KB

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stk.v.9.0 WrittenBy STK_v9.2.1 BEGIN Receiver Name Receiver221  <STKOBJECT> <OBJECT Class = "CommRadarObject" Name = "STK_Receiver_Object"> <OBJECT Class = "bool" Name = "Clonable"> True </OBJECT> <OBJECT Class = "string" Name = "Description"> "STK Receiver Object" </OBJECT> <OBJECT Class = "link" Name = "Model"> <OBJECT Class = "Receiver" Name = "Complex_Receiver_Model"> <OBJECT Class = "double" Name = "ANT2LNALineLoss"> 1 units </OBJECT> <OBJECT Class = "double" Name = "ANT2LNALineTemperature"> 290 K </OBJECT> <OBJECT Class = "AttrCon" Name = "AntennaControl"> <OBJECT Class = "string" Name = "AntennaReferenceType"> "Embed" </OBJECT> <OBJECT Class = "link" Name = "Antenna"> <OBJECT Class = "Antenna" Name = "Isotropic"> <OBJECT Class = "bool" Name = "Clonable"> True </OBJECT> <OBJECT Class = "string" Name = "Description"> "Models an isotropic antenna" </OBJECT> <OBJECT Class = "double" Name = "DesignFrequency"> 14500000000 Hz </OBJECT> <OBJECT Class = "double" Name = "Efficiency"> 1 unitValue </OBJECT> <OBJECT Class = "bool" Name = "ReadOnly"> False </OBJECT> <OBJECT Class = "string" Name = "Type"> "Isotropic" </OBJECT> <OBJECT Class = "string" Name = "UserComment"> "Models an isotropic antenna" </OBJECT> <OBJECT Class = "string" Name = "Version"> "1.0.0 a" </OBJECT> </OBJECT> </OBJECT> <OBJECT Class = "link" Name = "Orientation"> <OBJECT Class = "Orientation" Name = "Azimuth Elevation"> <OBJECT Class = "string" Name = "AboutBoresight"> "Rotate" </OBJECT> <OBJECT Class = "double" Name = "AzimuthAngle"> 0 rad </OBJECT> <OBJECT Class = "double" Name = "ElevationAngle"> 1.570796326794897 rad </OBJECT> <OBJECT Class = "string" Name = "Type"> "Azimuth Elevation" </OBJECT> <OBJECT Class = "double" Name = "XPositionOffset"> 0 m </OBJECT> <OBJECT Class = "double" Name = "YPositionOffset"> 0 m </OBJECT> <OBJECT Class = "double" Name = "ZPositionOffset"> 0 m </OBJECT> </OBJECT> </OBJECT> <OBJECT Class = "link" Name = "Polarization"> <OBJECT Class = "Polarization" Name = "Linear"> <OBJECT Class = "double" Name = "CrossPolLeakage"> 1e-006 units </OBJECT> <OBJECT Class = "string" Name = "ReferenceAxis"> "X Axis" </OBJECT> <OBJECT Class = "double" Name = "TiltAngle"> 0 rad </OBJECT> <OBJECT Class = "string" Name = "Type"> "Linear" </OBJECT> </OBJECT> </OBJECT> <OBJECT Class = "bool" Name = "UsePolarization"> False </OBJECT> </OBJECT> <OBJECT Class = "AttrCon" Name = "AntennaNoise"> <OBJECT Class = "bool" Name = "ComputeAtmosAbsorpNoise"> False </OBJECT> <OBJECT Class = "bool" Name = "ComputeCloudsFogNoise"> False </OBJECT> <OBJECT Class = "bool" Name = "ComputeCosmicNoise"> False </OBJECT> <OBJECT Class = "bool" Name = "ComputeEarthNoise"> False </OBJECT> <OBJECT Class = "bool" Name = "ComputeExternalNoise"> False </OBJECT> <OBJECT Class = "string" Name = "ComputeOption"> "Constant" </OBJECT> <OBJECT Class = "bool" Name = "ComputeRainNoise"> False </OBJECT> <OBJECT Class = "bool" Name = "ComputeSunNoise"> False </OBJECT> <OBJECT Class = "bool" Name = "ComputeTropoScintNoise"> False </OBJECT> <OBJECT Class = "double" Name = "ConstantNoiseTemp"> 290 K </OBJECT> <OBJECT Class = "bool" Name = "InheritScenarioEarthTemperature"> True </OBJECT> <OBJECT Class = "double" Name = "LocalEarthTemperature"> 290 K </OBJECT> <OBJECT Class = "double" Name = "OtherNoiseTemp"> 0 K </OBJECT> </OBJECT> <OBJECT Class = "bool" Name = "AutoScaleBandwidth"> True </OBJECT> <OBJECT Class = "double" Name = "Bandwidth"> 2000 Hz </OBJECT> <OBJECT Class = "bool" Name = "Clonable"> True </OBJECT> <OBJECT Class = "string" Name = "ComputeSystemNoiseTemp"> "Constant" </OBJECT> <OBJECT Class = "double" Name = "ConstantSystemNoiseTemp"> 290 K </OBJECT> <OBJECT Class = "string" Name = "Description"> "Complex model of a receiver" </OBJECT> <OBJECT Class = "bool" Name = "EnableLinkMargin"> False </OBJECT> <OBJECT Class = "link" Name = "Filter"> <OBJECT Class = "Filter" Name = "Butterworth"> <OBJECT Class = "bool" Name = "Clonable"> True </OBJECT> <OBJECT Class = "double" Name = "CutoffFrequency"> 10000000 Hz </OBJECT> <OBJECT Class = "string" Name = "Description"> "General form of nth order Butterworth filter with flat passband and stopband regions" </OBJECT> <OBJECT Class = "double" Name = "InsertionLoss"> 1 units </OBJECT> <OBJECT Class = "double" Name = "LowerBandwidthLimit"> -20000000 Hz </OBJECT> <OBJECT Class = "int" Name = "Order"> 4 </OBJECT> <OBJECT Class = "bool" Name = "ReadOnly"> False </OBJECT> <OBJECT Class = "string" Name = "Type"> "Butterworth" </OBJECT> <OBJECT Class = "double" Name = "UpperBandwidthLimit"> 20000000 Hz </OBJECT> <OBJECT Class = "string" Name = "UserComment"> "General form of nth order Butterworth filter with flat passband and stopband regions" </OBJECT> <OBJECT Class = "string" Name = "Version"> "1.0.0 a" </OBJECT> </OBJECT> </OBJECT> <OBJECT Class = "bool" Name = "FrequencyAutoTracking"> True </OBJECT> <OBJECT Class = "double" Name = "Frequency"> 14500000000 Hz </OBJECT> <OBJECT Class = "double" Name = "LinkMarginThreshold"> 1 units </OBJECT> <OBJECT Class = "string" Name = "LinkMarginType"> "Eb/No" </OBJECT> <OBJECT Class = "double" Name = "LNA2RcvrLineLoss"> 1 units </OBJECT> <OBJECT Class = "double" Name = "LNA2RcvrLineTemperature"> 290 K </OBJECT> <OBJECT Class = "double" Name = "LNAGain"> 1 units </OBJECT> <OBJECT Class = "double" Name = "LNANoiseFigure"> 1.258925411794167 units </OBJECT> <OBJECT Class = "double" Name = "LNATemperature"> 290 K </OBJECT> <OBJECT Class = "AttrCon" Name = "PreDemodGainsLosses"> <OBJECT Class = "container" Name = "GainLossList" /> </OBJECT> <OBJECT Class = "AttrCon" Name = "PreReceiveGainsLosses"> <OBJECT Class = "container" Name = "GainLossList" /> </OBJECT> <OBJECT Class = "double" Name = "RainOutagePercent"> 0.1 "" </OBJECT> <OBJECT Class = "bool" Name = "ReadOnly"> False </OBJECT> <OBJECT Class = "string" Name = "Type"> "Complex Receiver Model" </OBJECT> <OBJECT Class = "bool" Name = "UseFilter"> False </OBJECT> <OBJECT Class = "bool" Name = "UseRain"> True </OBJECT> <OBJECT Class = "string" Name = "UserComment"> "Complex model of a receiver" </OBJECT> <OBJECT Class = "string" Name = "V

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