The rapture itself is not described in the Revelation, and for that reason there are three common conceptions as to when it will occur, of which I am sure you are aware.
There are however some hints we can use to form our own opinion as to when it will occur in Revelation.
As I'm sure you are aware the rapture is a concept formed from being caught up into the air in:
1st Thessalonians 4:17 KJV
Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
The first clue we have is in the verse preceding this:
1st Thessalonians 4:16 KJV
For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
The second clue comes from the Revalition.
Revelation 19:11 KJV
And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.
One last clue is in:
Revelation 19:14 KJV
And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean.
Although my answer is probably not what you are seeking it is the best answer I can give.
