Either of two HD satellite dishes receive DIRECTV HD channels. They are about 2' X 3' in size and require a clear view of the southern sky. Older AT9 "Sidecar" Dish Newer AU9 "Slimline" Dish What is that side brace in the AT-9 photo? That is a "monopole." For proper installation, either dish typically requires two monopoles. What are those things out in front of the dish? LNB's (low noise block converters) are mounted just in front of the dish to receive the satellite signals. Either "5 LNB Dish" is a reflector that focuses the satellite signal on the LNBs. It's the LNB that does the work. Where are the satellites? DIRECTV has 7 "orbital positions" 22,240 miles above the equator. That is why your dish points south. What channels do those satellites provide? 11 satellites are needed to provide a projected total of 3,200 local channels and 550 national channels. Satellite Locations: Click links to see channel lists. 99° W Longitude - HD Local channels 103° W Longitude - Some HD Local & the "new" HD channels 101° W Longitude - SD national and Local channels and more 119° W Longitude - SD national and local channels 110° W Longitude - HD national channels There are two other satellites: - These require additional dishes. 95° West Longitude - International channels 72.5° West Longitude - Small market local channels Which satellite broadcasts my local channels? Local Channels It looks like there are only 3 LNB's. How does that work? Each LNB can receive more than one satellite.LNB #1 receives from the 99°, 101°, and 103° orbital locations.LNB #2 receives from the 110° orbital location.LNB #3 receives from the 119° orbital location. Thank you to Milominderbinder2, dmurphy, Tom Robertson, and Stuart Sweet!