Hello,
Are there any publically available Communication log files from earth to spacecraft for present and/or past unmanned missions?
It might have start and end dates and times of signals being sent back and forth from earth to spacecraft.
I wouldn't be interested in specifics of content sent or received but only dates times and frequencies and instrument name used at those times if I was lucky.
Is there even such a thing and where might I find something like that?
thanks

Not that I'm aware of.

However, I recently ran across http://www.mit.edu/~portillo/dsn/index.html which is based on scraping DSN Now. I have no idea if the site actually works; it just says "loading data" endlessly for me, but maybe you have to register or something, or maybe it's a browser compatibility thing.

For us (MER/MSL) the "log files" are ITAR material and cannot be published. PDS product headers might contain some vehicle state data you could use.

Paolo