The images that are acquired in the early hours have a low sun elevation angle (typically <10 degrees, depending on the location).
Here are the ways to exclude images that are taken early:
1. When using Planet Explorer: In the filters, you can set the sun elevation angle. PFA screenshot.
2. API: You can use this filter while using Data API.
{"type":"RangeFilter","config":{"gte":10,"lte":90},"field_name":"sun_elevation"}
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