气候变化领域集成服务门户(CCPortal): Fiducial Reference Measurements for validation of Sentinel-2 and Proba-V surface reflectance products

CCPortal

DOI	10.1016/j.rse.2020.111690
	Fiducial Reference Measurements for validation of Sentinel-2 and Proba-V surface reflectance products
	Origo N.; Gorroño J.; Ryder J.; Nightingale J.; Bialek A.
发表日期	2020
ISSN	00344257
卷号	241
英文摘要	Many derived Earth Observation products share surface reflectance as a common step in their processing chains. This makes the maintenance and improvement of surface reflectance product quality of fundamental importance to ensure information derived from these downstream products can be trusted. Despite this, the literature is relatively light on the implementation of validation methodologies designed for surface reflectance. In response to the need to improve general EO validation methodologies, the concept of fiducial reference measurements (FRM) was created that would produce validation data that is fully characterised and independent, with associated uncertainties, and traceable to SI. This paper describes a field campaign designed to produce surface reflectance validation data, in line with the FRM ideology, for validating the Sentinel-2 L2A (S2) and Proba-V S1-TOC (Proba) surface reflectance products. The key methodological procedures are outlined in detail to facilitate uptake of FRM methods in future validation studies. These include the calibration and characterisation of field instruments, the field measurement protocol, and uncertainty propagation. Comparison of S2 with field measurements showed agreement within the stated uncertainties present for all bands and locations at the pixel and area scales. The Proba comparison results demonstrated a general disagreement within the stated uncertainties. However, there is a lack of uncertainty information provided by the product as well as publicly available product uncertainty requirements which mean that it is difficult to assess this fully. The aim of this practical demonstration of FRM-based surface reflectance validation, that utilises metrological practices for uncertainty characterisation, is to encourage the adoption of these procedures in future land surface reflectance validation studies and operational activities. © 2020 Elsevier Inc.
英文关键词	FRM; Surface reflectance; Uncertainty; Validation
语种	英语
scopus关键词	Reflection; Earth observation products; Reference measurements; Surface reflectance; Uncertainty; Uncertainty informations; Uncertainty propagation; Validation; Validation methodologies; Uncertainty analysis; calibration; land surface; model validation; pixel; Proba; Sentinel; uncertainty analysis; Proba
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179378
作者单位	Earth Observation, Climate and Optical group, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom; Department of Geography, University College London, Gower StreetWC1E 6BT, United Kingdom
推荐引用方式 GB/T 7714	Origo N.,Gorroño J.,Ryder J.,et al. Fiducial Reference Measurements for validation of Sentinel-2 and Proba-V surface reflectance products[J],2020,241.
APA	Origo N.,Gorroño J.,Ryder J.,Nightingale J.,&Bialek A..(2020).Fiducial Reference Measurements for validation of Sentinel-2 and Proba-V surface reflectance products.Remote Sensing of Environment,241.
MLA	Origo N.,et al."Fiducial Reference Measurements for validation of Sentinel-2 and Proba-V surface reflectance products".Remote Sensing of Environment 241(2020).