Is "the observer on earth" view common among Creationists? According to these sources, source 1, source 2, source 3, source 4, the Genesis account was narrated from the viewpoint of an observer on the earth's surface.


  from source 1:
  As in any scientific experiment, you make observations of what is
  occurring.  It is extremely important to consider your “frame of
  reference” when interpreting any observation.  In other words, where
  are you observing these events from.  For the entire creation event,
  the key to this is in verse 2.  To an observer, standing on the
  surface of the earth, God was hovering over the earth.  The rest of
  the creation events must be interpreted as if the observer were
  standing on the surface of the earth.  Only with this “frame of
  reference” will you reach the right conclusions.
  
  from source 2: It is narrated from the viewpoint of an observer on the earth's surface. This is the most important key to understanding
  Genesis 1. Most people view the creation account from the opposite
  direction: of someone in outer space looking down on the earth.
  Misunderstanding the proper frame of reference causes most of the
  confusion over this portion of Scripture. 


As per this view, the sun was not created on the fourth day but rather was created prior to it (Day 1 or before) and became clearly visible from that day on wards. This can solve the problem of the sun, moon and stars seem to have been created after the earth, which is not in harmony with science facts. 

In this question and here and here also, it looks like most of the people agree that the sun was created only on the fourth day. 


  Genesis 1:16-19 (NIV) God made two great lights—the greater light to
  govern the day and the lesser light to govern the night. He also made
  the stars. God set them in the vault of the sky to give light on the
  earth, to govern the day and the night, and to separate light from
  darkness. And God saw that it was good. And there was evening, and
  there was morning—the fourth day.


Looking closely at this passage, there is no mention of sun and moon explicitly but many readers conclude it as implicitly mentioned. source 1 says, "Here the atmosphere is finally clear enough for the observer on the surface of earth to observe the sun and the moon". 

Question: Is it a common view among Creationists(OEC &amp; YEC), to assume that Genesis account was narrated as if the observer were standing on the surface of the earth? Or, this view is not common at all?
No, it is not common.  The "observer on earth" perspective is common and key to OEC, while it is tangential to the YEC interpretation.

In the Old Earth Creationist view of Hugh Ross, the Spirit's vantage point is key to a literal interpretation of the passage.  The cosmos was created in verse one, which would include sun, moon, stars, earth.  Now you have the Spirit hovering over the waters of an formless, empty, dark, earth which is experiencing accretion of dust . First the Spirit will say, "cause there to appear" light, then later as more dust settles will the sun appear as a distinct object in the sky. 

YEC, in contrast has no need to pay special attention to the vantage point of the author.