fetch_GEE development

[YenCheng1226]

Interfaces with Google Earth Engine Python API

Collections: Sentinel-1, Sentinel-2

Temporal Windows:

1. pre-event: search for images within [Date -15 days, Date -1 days]
2. post-event: search for images within [Date, Date +3 days]

Quality Check:

• coverage: coverage percentage in defined bbox
• metadata: meta data of every imagery must be queried