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D CV-20-01: Surface Reflectance measurements Intercomparison exercise for vegetation (SRIX 4Veg)
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Number:
CV-20-01
Title:
Surface Reflectance measurements Intercomparison exercise for vegetation (SRIX 4Veg)
Status:
Open
Creation Year:
2020
Completion Date:
2024 Q4 (17 days remaining)
Description:

Intercomparison exercise for surface reflectance fiducial measurements for vegetation to test user-based differences in surface reflectance fiducial reference measurements (FRM) used for validation of current SR satellite products;and to ensure consensus on global SR validation protocols.

Link to GEO Work Programme:
GEO BON; GEOGLAM; GFOI
External Reference:
http://frm4veg.org
Responsible Users:
P. Goryl, Riza Singh
Responsible CEOS Entities:
WGCV
Contributing Agencies:
ESA, GA, CSIRO, NPL, WGCV IVOS, WGCV LPV
Relevant Sustainable Development Goal (SDG):
Progress Reports:
2020-09-04 21:09:32 UTC
on track
P. Goryl | 2022-11-23 08:30:31 UTC

There is a growing interest in UAV-based optical sensors for SR Cal/Val; •UAV provide flexible and cost-effective solution for SR Cal/Val: cover greater areas, survey of inaccessible sites, complement in-situ infrastructure, enhanced spatial sampling. •However, protocols around this are yet to be developed and lots of people are developing different procedures. SRIX4VEG  Contribute towards defining global community-agreed guidelines, protocols and procedures for UAV-based SR product validation. A campaign took place in Spain, Barrax in July 2022 with the participation of 7 teams from EU, Canada, US with 52 UAV flights in total with different  UAV-based hyper- and multi-spectral sensors in VNIR/SWIR range including  ground based measurements (ASD FieldSpec, reflectance panels, GPS base station, Microtops for AOT). •Round-robin were organised where each participant flew back-to-back with every other in turn, common flight plan, pairwise comparison.  The Processing UAV data on-going; after gathering the results, comparison over integrated spectral bands matching S2 will be undertaken. Variability among results will be analysed and discussed in a WS planned in Q1 2023. Inter-comparison results will be published in a peer-reviewed journal (Q2 2023) and finally best practices protocol for UAV-based SR product validation will be prepared and agreed; first version expected in Q2 2023 for endorsement by CEOS. A complementary exercise will be organised in Australia in Q1 or Q2 2022. 

Marie-Claire Greening | 2023-02-12 18:25:45 UTC

Delta campaign will be organised in Australia in Q1/Q2 2023. Workshop will follow in Q2/Q3 2023 together with a publication with the results and updated protocols 

Excecutive Support - Evenflow | 2024-02-26 15:20:05 UTC

Second workshop for SRIX4Veg was held in November 2023 at ESA-ESRIN. SRIX4Veg-II will conduct a round-robin exercise in Calperum Research Station, an CEOS WGCV LPV supersite in Australia in the week of 11-15 March 2024. It will build on the findings from SRIX4Veg-I and extend the exercise to a more complex vegetation cover. Deliverable needs to be extended to 12/31/2024.

Comments:
| 2020-09-04 21:09:32 UTC
first workshop planned for 2021
P. Goryl | 2022-11-23 08:32:09 UTC

First workshop in 2021; campaign was done in July 2022; additional campaign will  take place in Australia in Q1/Q2 2022. Final Surface Reflectance protocols should be provided by Q3/Q4 2023. 

Actions:
Created:
2020-09-04 21:09:32 UTC
Last Updated:
2024-02-26 15:20:05 UTC