Can I apply to NJIT twice during the same year?

I want to apply now with my junior year sat scores because I’m taking the sat again in November.

Can I apply now with my 1610 sat score and then again in December after I get my November sat score?

you just need to send them your updated scores. I do not think you can reapply. In case you are applying for the accelerated programs it may be well worth it to wait.