On January 17th, we had a heavy duty spray day. Remember the following:
1. This area of air space seldom has high altitude commercial jets.
2. Its very very difficult to get pictures of high altitude aircraft and contrails. Think about it! They are 6 to 7 miles high. The Kodak company will tell you in a heartbeat that their cameras are not designed to take such pictures.
3. Texas and the Deep South are the last place you'd expect to find halos around the sun due to the climate. Usually they are found in the dead of winter in the North East and Canada under extreme cold conditions.
4. Humidity was too low today for normal jet contrails. They need humidity to the point of saturation like 90% to 95% humidity.
5. Chemical trails can be laid at any altitude.
6. Chemicals trails don't evaporate, they disperse from higher concentrations to lower concentrations.
7. Chemical trails will appear massive when laid out at low altitudes.
8. When the FAA doesn't investigate your complaint but sends you a letter explaining the definition of a contrail you should be doubly suspicious. Thousands of people who are seeing this can't be wrong.

What happened on January 11th 2010?

Massive Spraying went on in the Westheimer/Windchase area. In a short time a halo around the sun poped up. (which normally happens when heavy spraying is going on.)

Another thing you can see is the drip like quality to the chemical.

Would you be able to take such wonderful photos if they were 6 to 7 miles high?

Why should I consider these normal jet contrails when they appear as if they much lower to the ground than normal jet contrails?

Halos normally occurr in extremely cold conditions in the North not in the tropical climate of Houston.

Commercial jets don't travel in pairs. Military jets do.

When were contrail grids a normal phenomenon over our neighborhoods?