mDRONES4RIVERS stationary field spectroscopy

Zip - Folders containing processed stationary field spectroscopy measurementes. Time series were collected with solar powered long-term installations (LTI) using the RoX field spectrometer within the frame of the mDRONES4RIVERS project in the years 2019, 2020 and 2021 respectively. Measurement were recorded at the southern tip of the island Nonnenwerth in 2019 and 2020, over a side arm of the Rhine in Emmericher Ward 2019, 2020, 2021 (as Emmerich I) and in a ditch at the side arm in Emmericher Ward 2020 and 2021 (as Emmerich II) in Germany. LTI Nonnenwerth was investigating dewberry (Rubus caesius), LTI Emmerich I was investigating sediment dynamics and mixed pioneering vegetation and LTI Emmerich II was investigating mainly mixed pioneering vegetation. The incoming radiance is measured with optics of hemispherical (~180°) field of view and the reflected radiance with conical (~25°) field of view. Zip repositories contain folders named according to LTI place and year of recording. They include human radable .csv files for raw RoX data, calibrated radiance and reflectance in subfolders named after date of recording, a folder with time-lapse photographs of the footprint (only for Emmerich I and Emmerich II) and an ALL_INDEX file, each. For reflectance and radiance files, the first collumn contains the associated central wavelengths, the first row the time of recording, each subsequent field of the table contains the calibrated radiance (in W m^-2 sr^-1 nm^-1) or reflectance (unitless) values. The ALL_INDEX file contains meta data, computed vegetation indices(VI) and quality flags for the time series.本数据集为包含经处理的静态野外光谱测量数据的压缩文件夹。时序数据由太阳能供电的长期监测装置（LTI）搭载RoX野外光谱仪（RoX field spectrometer）采集，采集工作分别于2019、2020、2021年在mDRONES4RIVERS项目框架下开展。 2019年与2020年的测量点位位于德国恩嫩韦特岛（Nonnenwerth）南端；2019、2020、2021年的测量点位位于埃默里希区（Emmericher Ward）内的莱茵河（Rhine）支流旁（记为Emmerich I）；2020年与2021年的测量点位位于埃默里希区该支流旁的沟渠中（记为Emmerich II）。 其中，LTI Nonnenwerth用于研究露莓（Rubus caesius）；LTI Emmerich I用于研究沉积物动力学与混合先锋植被；LTI Emmerich II主要研究混合先锋植被。 本数据集采用半球视场（约180°）光学组件测量入射辐射度，采用锥形视场（约25°）光学组件测量反射辐射度。 压缩包内的文件夹以长期监测装置的布设地点与记录年份命名，各子文件夹包含以下内容：以记录日期命名的子文件夹，其中存储有可读的原始RoX数据、定标后辐射度与反射率的.csv文件；针对Emmerich I与Emmerich II的布设点位，额外包含观测覆盖区延时摄影照片文件夹；以及一个ALL_INDEX元数据文件。 对于辐射度与反射率文件，表格首列存储对应中心波长，首行存储记录时刻，表格其余单元格分别存储定标后的辐射度（单位：瓦每平方米每球面度每纳米，W·m⁻²·sr⁻¹·nm⁻¹）或反射率（无单位）数值。ALL_INDEX文件包含时序数据的元数据、计算得到的植被指数（VI）与质量标记。