Editing the altitiude of the atmospheric haze.

I've recently began flying the X-15 into the exosphere and take advantage of the 'boundless sky' and dense free environment.
Strangely, the altitiude of the haze in FXS is unrealistic and extends beyond 350,000ft where normally at this altitiude the haze is observed to be below.
What editing can I make on FSX can I make to lower the haze altitiude?
Strangely, the altitiude of the haze in FXS is unrealistic and extends beyond 350,000ft where normally at this altitiude the haze is observed to be below.
What editing can I make on FSX can I make to lower the haze altitiude?