There is a tremendous amount of information here, presented in an excellent display. We all owe Mr. Spears a great round of applause.
The beam contour maps reflect the satellite operating at full power. Reception in this case is probably good out to the white or pink isobars, the low 50’s dBw. However, in normal operation, the power is often dialed down to match the market.
some comments from spears61
The FCC started publishing a web data base in the late summer of 2003. Any original license application filed before that date only has a "marker" in the file system and does not have any on line data of any kind. If one of the "old" satellites is moved to a new location after mid 2003, the modification to the original license will include the new footprint data. Remember it can take 5 years or longer to launch after receiving the license. Today, we are still seeing a few launches with no data when the license is 6 or more years old. A good example of this will be one of the DIRECTV 17 GHz satellites that had its application filed pre 2003 and has no usable data in the FCC file.
The Directv satellites that have zero beam data fall into the pre 2003 group of original licenses.
Quantity of beam footprints
- The Spaceway satellites are very unique and can essentially generate an infinite number of spots. DIRECTV applied and received an exemption allowing them to provide a couple of "examples" in digital form and sketches in their license that show how they can blanket the country with spots.
- Some of the other newer satellites generated so many beams that it overwhelmed the FCC filing system. Again, DIRECTV applied for and received an exemption to only show some examples in those cases.
- And new this year, they are starting to use a new database (in select cases) which allows submission of more data. DIRECTV12 used that format and that is the reason we have a great deal of data for DIRECTV12.
In summary, if you don't see a beam footprint, it was not submitted or is really old.
The 17 GHz BSS licenses were just issued after a many year fight over ownership of the slots. It's a really big deal since they are very high power just like the 12 GHz KU satellites. DIRECTV, Echostar, Pegasus, and Intelsat are the major players for this major new addition for high power satellites. They have a maximum of 5 years from this summer to get them launched - something like 15-20 satellites in total. We will probably see some of them launch in 2011-2012.
Edited by gct, 17 March 2010 - 08:49 PM.