Does John see heaven opened, while on the earth, looking toward heaven?

Or does John see heaven opened, while in heaven, looking toward the earth?

Revelation 19:1 And after these things I heard a great voice of much people in heaven, saying, Alleluia; Salvation, and glory, and honour, and power, unto the Lord our God:

  4 And the four and twenty elders and the four beasts fell down and worshipped God that sat on the throne, saying, Amen; Alleluia.

  11 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.

  14 And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean.

Does John, in heaven, witness Jesus, and the armies which were in heaven, pass through the opening, leaving heaven for battle on the earth?