Please note!  This long QHA  was originally built for its low angle reception abilities over that of a standard QHA.  Since building two of these and using the antennas, a new design was found and extensively tested, that puts any QHA  in second place for anything less than 20 degrees, and is more than adequate for rest of the orbit. (Please take a look at actual performance recording links on the bottom of this page.)  This has no fades over head.  This plus being less critical to build makes it a better choice in my view.  To show what the Double Cross antenna can do, take a look at this 1 degree pass of  NOAA 17.  You wont realize how rare that picture is until you try a 1 degree pass with a QHA, or other non beam antenna.  This antenna at first glance may look like it came from the beaches of Normandy for  stopping tanks, but don't let looks fool you into not building it.  If performance, not looks is what is important to you, give it a try.  You wont be disappointed. (If constructed correctly!)

Just below the 1 degree picture is a 25 degree with mapping turned off to give maximum resolution with the WxToImg program. 

                      Links on the bottom are for source and performance information.

Here is a link to the antenna and program that made the 1 degree picture.