Assuming the journal doesn't object, it will probably be OK since your likely readership probably knows the journal. But I would suggest that the first time you give a citation you do it as "IEEE Trans. Geosci. Remote Sens. (IEEE TGRS)" and the use the shortened form "IEEE TGRS" afterwards.

But the journal's rules apply, of course.

Note that the journal's web pages don't use TGRS exclusively, but spell it out at least once, say at the top of web pages.

Assuming the journal doesn't object, it will probably be OK since your likely readership probably knows the journal. But I would suggest that the first time you give a citation you do it as "IEEE Transactions on Geoscience and Remote Sensing (IEEE TGRS)" and the use the shortened form "IEEE TGRS" afterwards.

But the journal's rules apply, of course.

Note that the journal's web pages don't use TGRS exclusively, but spell it out at least once, say at the top of web pages.