With the operational lifetime of PROBA-V coming to an end on 30 June 2020, there are a number of ongoing efforts to ensure continuity of end-user products, such as Top-of-Canopy reflectance (TOC) and Normalized Difference Vegetation Index (NDVI), by switching from PROBA-V to Sentinel-3:
1. The SYN branch of the ESA Sentinel-3 processing provides 1 km VEGETATION-like products: TOA reflectance (SY_2_VGP), 1 day synthesis surface reflectance and NDVI (SY_2_VG1) and 10 day synthesis surface reflectance and NDVI (SY_2_V10).
2. The Copernicus Global Land Service is also preparing the switch for the 300 m and 1 km NDVI. The processing line will include BRDF-correction in order to minimize the effect of differences in illumination and viewing angles.
We kindly ask our users to keep in mind that providing temporal consistency when switching from one sensor (PROBA-V) to another (Sentinel-3) is a challenge, because it is affected by many factors, such as differences in radiometric calibration, differences in spectral bands, and differences in orbital characteristics and scanning systems.
All teams involved strive to minimize the impact to users and downstream services.