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- 2018
车载三天线GNSS的直接法定姿及精度评估
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Abstract:
针对移动测量系统对载体姿态的需求，对车载三天线全球卫星导航系统（global navigation satellite system，GNSS）的直接法定姿进行了研究。分析了定姿的原理，给出了姿态解算公式，并提出一种简便的方法确定航向角的象限，解决了航向角的多值性问题。为了评估该方法的精度，利用车载的三天线GNSS进行了动态实验，采集了动态观测数据，利用直接法对观测数据进行了姿态解算，并用同车搭载的一套高精度惯性导航系统（inertial navigation system，INS）给出的姿态参考值对三天线GNSS定姿的精度和可靠性进行了评估。结果表明，三天线GNSS直接法定姿精度高、可靠性好，并具有计算简便，可避免奇异性问题等优点
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