Pre-Delta-X: Spectral Reflectance of Water Surface, Atchafalaya Basin, LA, USA, 2016

This dataset provides measurements of in situ remote-sensing reflectance (Rrs; per steradian) of surface water across Atchafalaya Basin, southern coastal Louisiana, USA within Mississippi River Delta (MRD) floodplain. The in situ spectral reflectance measurements were made during the Pre-Delta-X campaign in Fall 2016 (October 14 to 2). Hand-held spectrometer measurements were collected from a boat at 35 locations selected to represent a range of suspended sediment concentrations and properties from a variety of hydrodynamic and physical settings typically encountered across the Atchafalaya basin. These 35 spectral reflectance measurements were collected at 24 unique sites that coincide with measurements of total suspended solids (TSS). The data serves two main purposes, to ground-truth the remote-sensing reflectance derived from NASA's Airborne Visible-Infrared Imaging Spectrometer - Next Generation (AVIRIS-NG) instrument, and to calibrate and validate algorithms for the retrieval of TSS from AVIRIS-NG.

本数据集提供了美国路易斯安那州南部海岸阿查法拉亚盆地（Atchafalaya Basin）以及密西西比河三角洲（MRD）冲积平原地表水体的原位遥感反照率（Rrs；每球面度）测量值。原位光谱反照率测量是在2016年秋季的Delta-X前行动（10月14日至2日）期间进行的。手持式光谱仪测量是在35个地点从一艘船上收集的，这些地点被精心挑选以代表阿查法拉亚盆地内遇到的多种水动力和物理环境下的悬浮颗粒浓度和特性。这35个光谱反照率测量值是在24个独特的地点收集的，这些地点与总悬浮固体（TSS）的测量值相对应。该数据集的主要用途有两个：一是作为NASA航空可见光-红外成像光谱仪——下一代（AVIRIS-NG）仪器所获得遥感反照率的地面验证；二是校准和验证从AVIRIS-NG中提取TSS的算法。