| 精密单点确定航空重力载体运动速度和加速度 |
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| 引用本文： | 匡开发,王腾,王峥,周剑.精密单点确定航空重力载体运动速度和加速度[J].武汉大学学报(信息科学版),2017,42(3):299-303. |
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| 作者姓名： | 匡开发 王腾 王峥 周剑 |
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| 作者单位： | 1.武汉大学测绘学院, 湖北 武汉, 430079 |
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| 基金项目： | 国家973计划2013CB733301国家863计划2013AA122502国家自然科学基金41210006国家自然科学基金41374022 |
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| 摘 要： | 载体运动速度和加速度的精确确定是航空重力中的关键问题之一。基于IGS发布的精密轨道和钟差产品，并对各种相关误差精确模型化，利用载波相位直接法计算速度和加速度。在静态条件下，水平方向的速度精度优于1.5 mm/s，加速度精度优于2.0 mm/s2；垂直方向的速度精度约为2.0 mm/s，加速度精度约为2.5 mm/s2。在动态条件下，与多参考站载波相位直接法精度相当，并且计算效率和解算成功率更高。结果表明了本文方法在航空重力中的有效性。
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| 关 键 词： | 精密星历 精密钟差 载波相位 速度 加速度 |
| 收稿时间： | 2014-12-29 |
Determination of Precise Absolute Velocity and Acceleration Airborne Gravimetry |
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| Affiliation: | 1.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China2.School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China |
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| Abstract: | Precise velocity and acceleration is one of the key problems in airborne gravimetry. In this paper, a carrier phase-based velocity and acceleration determination method with precise orbit and clock products is introduced. In static case, the horizontal velocity and acceleration are better than 1.5 mm/s and 2.0 mm/s2, respectively, and the vertical ones are about 2.0 mm/s and 2.5 mm/s. In kinematic case, this method is comparable with the multi-reference stations method in precision, and has a higher computational efficiency and success rates. Meanwhile, the sampling rate of precise clock products only influences the velocity, and the order is lower than 1 mm/s. It turns out that the method presented here is effective in airborne gravimetry. |
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