Best practices for merging imagery from distinct spatial AOIs

[AnnaS]

Hello,

I have imagery from three missions, each covering an area close to one-another. Two of the areas overlap a little . How would you recommend I process these? Should I load each mission's imagery into a separate chuck on the same project and then merge them? If so, at what point in processing do I merge the chunks? I'm sure there are best practices for this case described somewhere, but nothing turned up in my searches, so thanks to anyone who can find a related post.

Cheers,
Anna