As salaam alaekum.

My question is regarding the salah time for fajar.  The time provided in your time table is 30minutes earlier than the fajar time given in MEC time table.  I'm little confused which time to follow. especially when to stop eating my sahoor?  should I follow your time table for fajar or MEC time table for fajar?
Which method do both of the time table use to calculate fajar?  Did any of the scholars went out and actually saw appearance of white line to start fajar? I heard a hadith that there are two fajar?  And one can eat sahoor till the second fajar?

Jazakh Allah