[CQ-Contest] Gray Line DXing

[Joe]

I've done a LOT of DXing using Gray line Propagation.  Ya know the 
period around sunset and sunrise. I have always found it amazing to see 
the VK and ZL stations just pop onto the band during this short window.

BUT,,

I have a question, on 160, 80, & 40, meters,  I never kept track of how 
does the propagation,,, "Propagate" frequency wise?

Does it open on the lower frequency first and close first or higher or 
what? Or all at once?

In other words this weekend is the Oceania DX contest and I planned on 
getting on for fun to give away some points as well as look for some new 
countries on the lower bands,

So was of course planning on doing some gray line work,  but I never 
thought, about what order of the bands should I attack this.

Should I start on 160 and when it closes  go to 80 and when it closes 
got to 40 etc.

or  what order if any does grey line propagation peak as the sun up is 
progressing?

Joe WB9SBD
-- 

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com