• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of >Analysis of GNSS-R Altimetry for Mapping Ocean Mesoscale Sea Surface Heights Using High-Resolution Model Simulations
【24h】

Analysis of GNSS-R Altimetry for Mapping Ocean Mesoscale Sea Surface Heights Using High-Resolution Model Simulations

机译：使用高分辨率模型仿真分析GNSS-R高程，用于绘制海洋中尺度海表高度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The capability of global navigation satellite system reflectometry (GNSS-R) altimetry to map mesoscale sea surface height (SSH) fields is analyzed using synthetic measurements derived from a high-resolution (1/10°) numerical model of the North Pacific. As an example, we consider the GPS and GLONASS constellation transmitters and assume six reflection-capable receivers onboard the Constellation Observing System for Meteorology, Ionosphere, and Climate satellites in high-inclination (720 km, 72°) orbits. An individual GNSS-R measurement has a ~10-km footprint. The SSH measurement error is simulated as a function of the incidence angle and the error in the delay measurement between the transmitter and receiver. The delay measurement error is assumed to have Gaussian white noise distribution with a root-mean-square error (RMSE) of 1.0 or 2.0 m. Two days of synthetic measurements are used to reconstruct SSH fields using a two-dimensional variational algorithm. For the 1.0-m delay error, the basin-wide RMSE of the mapped field is 2.3 cm and the spatial correlation between the mapped and true mesoscale fields is larger than 0.9. For the 2.0-m delay error, the basin-wide RMSE is 3.8 cm and the spatial correlation is larger than 0.8. Spectral and synoptic analyses suggest that two days of measurements can reproduce mesoscale features down to 100 km. The result demonstrates the ability of GNSS-R altimetry to suppress large measurement errors due to the high density of measurements and the potential to constrain mesoscale features down to scales beyond what the constellation of existing nadir-altimeters allows.
机译：使用从北太平洋高分辨率（1/10°）数值模型得出的综合测量结果，分析了全球导航卫星系统反射法（GNSS-R）测高仪绘制中尺度海面高度（SSH）场的能力。例如，我们考虑GPS和GLONASS星座发射器，并假设在高倾角（720 km，72°）轨道上的气象，电离层和气候卫星星座观测系统上装有六个具有反射能力的接收器。单个GNSS-R测量的足迹约为10公里。 SSH测量误差是根据入射角和发射器与接收器之间的延迟测量误差来模拟的。假设延迟测量误差具有1.0或2.0 m的均方根误差（RMSE）的高斯白噪声分布。使用两天的综合测量结果，使用二维变分算法来重建SSH字段。对于1.0米的延迟误差，映射场的盆地范围RMSE为2.3 cm，映射场和真实中尺度场之间的空间相关性大于0.9。对于2.0米的延迟误差，流域范围的RMSE为3.8 cm，空间相关性大于0.8。光谱和天气分析表明，两天的测量值可以重现100 km以下的中尺度特征。结果表明，GNSS-R测高仪具有抑制高测量密度的能力，可以抑制较大的测量误差，并且有可能将中尺度特征限制到超出现有最低点高度的范围。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号