FOSS4G 2019 is organising the Open source Earth Observation Data Challenge 2019. Please note the key dates and participate.
3 April : Launch of the call for proposals (already over)
10 April : Close of the call and start of the selection process (very close!)
20 April : Start of in-lab development and mentoring
1 July : Setup in cloud environment
28 August : Winners announced in FOSS4G 2019 Ceremony
More details at https://2019.foss4g.org/schedule/open-source-eo-data-challenge/,