4.3 Article

On the Development of SWOT In Situ Calibration/Validation for Short-Wavelength Ocean Topography

期刊

出版社

AMER METEOROLOGICAL SOC
DOI: 10.1175/JTECH-D-21-0039.1

关键词

Internal waves; Ocean dynamics; Small scale processes; Altimetry; Global positioning systems (GPS); In situ oceanic observations; Ship observations

资金

  1. National Aeronautics and Space Administration [80NM0018D0004]
  2. SWOT project
  3. NASA [NNX16AH76G]

向作者/读者索取更多资源

The future SWOT mission aims to map sea surface height with unprecedented accuracy and resolution. A field campaign was conducted to assess the potential of various instruments and platforms to meet the calibration and validation (Cal/Val) requirements of the mission. The observations demonstrated promising results and provided valuable information for the design of the postlaunch Cal/Val field campaign.
The future Surface Water and Ocean Topography (SWOT) mission aims to map sea surface height (SSH) in wide swaths with an unprecedented spatial resolution and subcentimeter accuracy. The instrument performance needs to be verified using independent measurements in a process known as calibration and validation (Cal/Val). The SWOT Cal/Val needs in situ measurements that can make synoptic observations of SSH field over an O(100) km distance with an accuracy matching the SWOT requirements specified in terms of the along-track wavenumber spectrum of SSH error. No existing in situ observing system has been demonstrated to meet this challenge. A field campaign was conducted during September 2019-January 2020 to assess the potential of various instruments and platforms to meet the SWOT Cal/Val requirement. These instruments include two GPS buoys, two bottom pressure recorders (BPR), three moorings with fixed conductivity-temperature-depth (CTD) and CTD profilers, and a glider. The observations demonstrated that 1) the SSH (hydrostatic) equation can be closed with 1-3 cm RMS residual using BPR, CTD mooring and GPS SSH, and 2) using the upper-ocean steric height derived from CTD moorings enable subcentimeter accuracy in the California Current region during the 2019/20 winter. Given that the three moorings are separated at 10-20-30 km distance, the observations provide valuable information about the small-scale SSH variability associated with the ocean circulation at frequencies ranging from hourly to monthly in the region. The combined analysis sheds light on the design of the SWOT mission postlaunch Cal/Val field campaign.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.3
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据