公开(公告)号：US07447170B2

公开(公告)日：2008-11-04

申请号：US10813198

申请日：2004-03-30

申请人： Hanching G. Wang ,  Chih-Chien Hsu

发明人： Hanching G. Wang ,  Chih-Chien Hsu

IPC分类号： H04B7/185 ,  G01S1/00

CPC分类号： B64G1/36 ,  B64G1/1007 ,  H04B7/18513 ,  H04B7/2041

摘要： A method, apparatus for reducing errors in a plurality of beacon beams is disclosed. The method comprises the steps of computing quantized channel weights {tilde over (W)}c from channel weights Wc for at least some of the channels; estimating the quantization error ΔBa for each of the beacon beams from a difference between the channel weights Wc and the computed quantized channel weights {tilde over (W)}c; and adding the estimated quantization error ΔBa to the beacon beams. Similarly, a beacon biases equivalent to the beacon asymmetry error can be computed by the ground beacon beam forming software and uploaded to the on-board software for error compensation. The apparatus comprises one or more means, such as a processor communicatively coupled to a memory storing instructions for performing these operations.

摘要翻译： 公开了一种减少多个信标光束中的误差的方法。 所述方法包括以下步骤：对于至少一些信道，从信道权重W C c C计算量化信道权重W C c C; 根据信道权重W C c和计算出的量化信道权重W C c之间的差来估计每个信标波束的量化误差ΔB＆lt; SUB＆gt; a＆ ; 并且将估计的量化误差ΔB添加到信标波束。 类似地，等效于信标不对称误差的信标偏移可以由地面信标波束形成软件计算并上传到车载软件进行误差补偿。 该装置包括一个或多个装置，诸如通信地耦合到存储用于执行这些操作的指令的存储器的处理器。

公开(公告)号：US06762716B2

公开(公告)日：2004-07-13

申请号：US10319273

申请日：2002-12-13

申请人： Hanching G. Wang ,  Chih-Chien Hsu

发明人： Hanching G. Wang ,  Chih-Chien Hsu

IPC分类号： H04B7185

CPC分类号： B64G1/36 ,  B64G1/1007 ,  H04B7/18513 ,  H04B7/2041

摘要： A method, apparatus for reducing errors in a plurality of beacon beams is disclosed. The method comprises the steps of computing quantized channel weights {tilde over (W)}c from channel weights Wc for at least some of the channels; estimating the quantization error &Dgr;Ba for each of the beacon beams from a difference between the channel weights Wc and the computed quantized channel weights {tilde over (W)}c; and adding the estimated quantization error &Dgr;Ba to the beacon beams. Similarly, a beacon biases equivalent to the beacon asymmetry error can be computed by the ground beacon beam forming software and uploaded to the on-board software for error compensation. The apparatus comprises one or more means, such as a processor communicatively coupled to a memory storing instructions for performing these operations.

公开(公告)号：US06561462B1

公开(公告)日：2003-05-13

申请号：US10081468

申请日：2002-02-21

申请人： Hanching G. Wang ,  Umesh Ketkar ,  Albert A. Munoz ,  Sadek Mansour

发明人： Hanching G. Wang ,  Umesh Ketkar ,  Albert A. Munoz ,  Sadek Mansour

IPC分类号： B64G136

CPC分类号： B64G1/363 ,  B64G2001/245

摘要： A spacecraft power/sun acquisition method includes a pitch search phase in which the spacecraft is rotated about a pitch axis, stopped, quaternions reset to remember position, and yaw search phase is entered when a first TOA occurs from a first slit sun sensor, and a keyhole slew is performed when the first TOA does not occur. The method also includes yaw search phase in which a keyhole slew is performed by rotating the spacecraft about a yaw axis, stopping the spacecraft, and entering pitch search phase when the first TOA does not occur, and in which the spacecraft is rotated about a yaw axis, stopped, quaternions reset, and sun hold phase is entered when a second TOA occurs from a second slit sun sensor. Lastly, the method includes a sun hold phase in which the spacecraft is oriented to the sun and placed in spin at power safe attitude.

摘要翻译： 航天器功率/太阳采集方法包括：俯仰搜索阶段，其中航天器围绕俯仰轴线旋转，停止，四元数复位为记忆位置，并且当第一狭缝太阳传感器发生第一TOA时进入偏航搜索阶段，以及 当不发生第一个TOA时执行锁孔旋转。 该方法还包括偏航搜索阶段，其中通过围绕偏转轴旋转航天器，停止航天器并且当第一TOA不发生时进入俯仰搜索阶段执行锁孔，并且其中航天器围绕偏航旋转 轴，停止，四元数复位，并且当从第二狭缝太阳传感器发生第二TOA时进入太阳保持相位。 最后，该方法包括太阳保持阶段，其中航天器被定向到太阳并以功率安全的姿态旋转。

公开(公告)号：US07149610B2

公开(公告)日：2006-12-12

申请号：US10647958

申请日：2003-08-26

申请人： Hanching G. Wang ,  Rongsheng Li

发明人： Hanching G. Wang ,  Rongsheng Li

IPC分类号： G05D1/00 ,  G05D1/08 ,  B64G1/24 ,  G06F17/00 ,  B64G1/36

CPC分类号： B64G1/28 ,  B64G2001/245 ,  G05D1/0883

摘要： A method and apparatus for estimating spacecraft momentum is disclosed. The method comprises the steps of generating a plurality of spacecraft momentum measurements, fitting the plurality of spacecraft momentum measurements to a parametric model of a spacecraft momentum profile having a time period of tp, determining the momentum of the spacecraft from the parametric model; and generating an estimate of the momentum to be removed from the spacecraft at least in part from the determined momentum of the spacecraft.

摘要翻译： 公开了一种用于估计航天器动量的方法和装置。 该方法包括以下步骤：产生多个航天器动量测量值，将多个航天器动量测量值拟合到具有时间段t p p p的航天器动量分布的参数模型，确定 航天器从参数模型; 并且至少部分地从所确定的航天器的动量产生要从航天器移除的动量的估计。

公开(公告)号：US07274329B2

公开(公告)日：2007-09-25

申请号：US10877883

申请日：2004-06-25

申请人： Richard A. Fowell ,  Hanching G. Wang

发明人： Richard A. Fowell ,  Hanching G. Wang

IPC分类号： H01Q3/00

CPC分类号： H04B7/2041 ,  H01Q3/267

摘要： A method and apparatus for correcting a beam error is disclosed. One embodiment of the method comprises the steps of selecting beamweight coefficients based on the satellite orbital data, evaluating an effect of quantization of the beamweight coefficients on the beam error, and selecting beamweight coefficients based at least in part upon the evaluation of the effect of beamweight coefficient quantization on beam error. One embodiment of the apparatus comprises a beamweight correction module for selecting beamweight coefficients based on satellite orbital data, for evaluating the effect of quantization of the beamweight coefficients on beam error, and for selecting beamweight coefficients based at least in part upon the evaluation of the effect of beamweight coefficient quantization on beam error. The beamweight correction module comprises a beamweight generator and a beamweight quantizer for quantizing beamweights from the beamweight generator.

摘要翻译： 公开了一种用于校正光束误差的方法和装置。 该方法的一个实施例包括以下步骤：基于卫星轨道数据选择波束权重系数，评估波束权重系数的量化对波束误差的影响，以及至少部分地基于对波束权重的影响的评估来选择波束权重系数 波束误差系数量化。 该装置的一个实施例包括用于基于卫星轨道数据选择波束权重系数的波束权重校正模块，用于评估波束权重系数的量化对波束误差的影响，以及至少部分地基于对该效应的评估来选择波束权重系数 的束权系数量化对波束误差的影响。 光束重量校正模块包括光束重量发生器和用于量化来自光束重量发生器的光束重量的光束权重量化器。

公开(公告)号：US07268726B2

公开(公告)日：2007-09-11

申请号：US10877564

申请日：2004-06-25

申请人： Richard A. Fowell ,  Hanching G. Wang

发明人： Richard A. Fowell ,  Hanching G. Wang

IPC分类号： H04B7/185 ,  H01Q1/00

CPC分类号： H01Q1/288 ,  G01S3/023 ,  H01Q3/26

摘要： A method of correcting for beacon pointing errors is disclosed. A desired beacon value and a predicted measured beacon value are computed and used to generate the beacon correction. An antenna pattern calculator can be used to compute the predicted measured beacon value, and a beacon correction value generator can be used to compute the desired beacon value and to generate the beacon correction.

摘要翻译： 公开了一种校正信标指向误差的方法。 计算期望的信标值和预测的测量信标值，并用它来产生信标校正。 可以使用天线方向图计算器来计算预测的测量信标值，并且可以使用信标校正值发生器来计算所需的信标值并产生信标校正。