Water Desalination and Reuse Center, Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
Planet, San Francisco, CA, USA.
Sci Rep. 2021 Jun 9;11(1):12131. doi: 10.1038/s41598-021-91646-w.
Earth observation has traditionally required a compromise in data collection. That is, one could sense the Earth with high spatial resolution occasionally; or with lower spatial fidelity regularly. For many applications, both frequency and detail are required. Precision agriculture is one such example, with sub-10 m spatial, and daily or sub-daily retrieval representing a key goal. Towards this objective, we produced the first cloud-free 3 m daily evaporation product ever retrieved from space, leveraging recently launched nano-satellite constellations to showcase this emerging potential. Focusing on three agricultural fields located in Nebraska, USA, high-resolution crop water use estimates are delivered via CubeSat-based evaporation modeling. Results indicate good model agreement (r of 0.86-0.89; mean absolute error between 0.06 and 0.08 mm/h) when evaluated against corrected flux tower data. CubeSat technologies are revolutionizing Earth observation, delivering novel insights and new agricultural informatics that will enhance food and water security efforts, and enable rapid and informed in-field decision making.
地球观测传统上需要在数据收集方面做出妥协。也就是说，人们可以偶尔以高空间分辨率感知地球；或者经常以较低的空间保真度进行感知。对于许多应用，都需要频率和细节。精准农业就是一个这样的例子，其空间分辨率达到亚 10 米，每天或亚每天的检索是一个关键目标。为了实现这一目标，我们利用最近发射的纳米卫星星座，从太空首次获取了无云的 3 米每日蒸发产品，展示了这一新兴潜力。该研究聚焦于美国内布拉斯加州的三个农业领域，通过基于立方星的蒸发建模提供高分辨率作物耗水估计。结果表明，与修正后的通量塔数据相比，模型吻合度较好（r 值为 0.86-0.89；平均绝对误差在 0.06 到 0.08 毫米/小时之间）。立方星技术正在彻底改变地球观测，提供新的见解和新的农业信息学，从而增强粮食和水安全工作，并实现快速和知情的现场决策。
