Nighttime light (NTL) remote sensing has become an important tool to study human activities and their impact on the environment. However, accurately and quantitatively measuring NTL has remained a challenge. In this study, we propose using radiant flux as a more precise measure of NTL energy intensity, which takes into account both radiance and image pixel area. To achieve this, we develop a conversion model from radiance to radiant flux based on the SNPP-VIIRS dataset and calculate the global radiant flux map for 2022. A validation of the model was conducted in 50 representative cities worldwide, confirming its rationality and accuracy. The use of radiant flux provides a more intuitive reflection of NTL energy intensity and eliminates system error caused by variations in pixel areas. This research emphasizes the importance of using a quantitative measurement for NTL and highlights the potential for further evaluation of socio-economic parameters and ecological impacts using NTL radiant flux.

中文翻译：

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全球夜间光的定量表征：一种基于辐射通量和 SNPP-VIIRS 数据的能量强度测量方法


夜间灯光 （NTL） 遥感已成为研究人类活动及其对环境影响的重要工具。然而，准确和定量地测量 NTL 仍然是一个挑战。在这项研究中，我们建议使用辐射通量作为 NTL 能量强度的更精确测量，它同时考虑了辐射度和图像像素面积。为了实现这一目标，我们基于 SNPP-VIIRS 数据集开发了一个从辐射通量到辐射通量的转换模型，并计算了 2022 年的全球辐射通量图。该模型在全球 50 个代表性城市进行了验证，证实了其合理性和准确性。使用辐射通量可以更直观地反映 NTL 能量强度，并消除由像素区域变化引起的系统误差。本研究强调了对 NTL 进行定量测量的重要性，并强调了使用 NTL 辐射通量进一步评估社会经济参数和生态影响的潜力。