Picture goes out

[gagaboo]

I'm not sure if this is where I should be posting this, but I haven't been able to get a resolution from tech support at Directv. I have a Directv Dual line lnb on my roof and another single which is on the garage. The single one works fine. The problem is with the dual line, which feeds my Tivo box. Starting last week, every day at 11:15 am to 11:30 am I loose signal on every channel except local channels. This has been happening consistenly (I've been recording it) since the beginning of last week. My husband thought maybe it was sunspots, this exact time of year, with the angle of the sun further in the south, etc, but we don't know. Anyone heard of this?