The main discussion points for the QWG meeting #9 are recalled:
- Mission Status: mission performances are excellent with no sign of degradation; the radiometric and geometric performances are within the requirements, though some minor anomalies need to be reviewed during the meeting, such as decompression errors and the calibration status, both the radiometry and the geometry will be reported and discussed.
- Mission extension: during last QWG Meeting it was agreed to consider Apr 2020 as the end of the operational Vegetation mission, since by that time the impact of orbital drift in long term analysis will start to be significant and can potentially lead to spurious trend in global long-term applications. The mission will be continued beyond this date in a so-called "Experimental Phase" and several options were already discussed on how to use this phase for Cal/Val and science purposes. Among these options, there is the planning of special acquisition campaigns (yaw, MVA, Antarctica) and the launch of complementary Cubesat sensors. During the current meeting these options will be reviewed more in details and final recommendations from the QWG will be gathered.
- Algorithms Baseline for C2: the development of the new NN cloud-screening algorithm for C2 is on-going in close collaboration between University of Valencia, VITO and Brockmann Consult. The implementation schedule is in-line to what proposed at the last QWG, in particular the 333m version of the NN is about to be completed and it will be delivered to Brockmann for validation in the next month. The NN will then be re-trained for the 100m and 1km dataset. The other main improvement in C2 will focus on the A/C and the used AOD; feedback from VITO on the usage of AOD climatology will be discussed during the current meeting. Finally, the final results on the implementation of a BRDF-correction method, to be deployed in the MEP, will be presented by VITO.
- Continuity: the transition from Proba-V to Sentinel-3 for land applications is currently on going and the corresponding algorithms are being upgraded at CGLS. S-3A+B constellation is fully operational after the initial tandem phase, which was essential to cross-validate the twin satellites. Various improvements were recently implemented in the SYN-VGT processing chain and the latest results will be reviewed and discussed during this meeting.