1090 Mhz attenuation

[CYFC]

I was wondering, what is the RF attenuation for 1090 Mhz through common window glass....?

[neroon79]

What's your definition of common window glass?

[CYFC]

Common: as in familiar, as in local, as in expected to find... window glass can be treated with solar reflection materials, tinted with various accent colours....hence, my question is...what would the attenuation be in
'common window glass, as found locally, that a person would be expected to find, and be familiar with....

[tarbat]

I was wondering, what is the RF attenuation for 1090 Mhz through common window glass....?

20db for K-glass double glazing, according to http://www.airnavsystems.com/forum/index.php?topic=4789.msg48158#msg48158