... There are 43 spot beams on the standard US 48 State geography, with one also for Alaska.
2 spots are labled for Puerto Rico and appear as if 2 TPN's (B-23 and B-24)will be used for HD LIL's to Puerto Rico (they are in the TPN 1-8 "spot" range)
That's the way I'm reading the data as two separate spotbeams for Puerto Rico. B23 for even numbered redirected nationals and 1 even SB transponder and B24 for odd numbered redirected nationals and 1 odd numbered SB transponder. Yet spear61's list has this data resulting in only one PR beam B23LR, carrying both even/odd national and SB transponders.
... The retransmitted CONUS TPN's #'s 9 thru 24 appear to be redirected thru Beam B-23 and B-24 also for Puerto Rico, and a separate Antenna C01 (TPN's 9 thu 24) for Hawaii. Alaska is covered by a "lobe" on the NATIONAL beam.
No specific spots for Hawaii. There is a spot for Alaska A-21 with one additional TPN for Alaska HD LIL's.
Same interpretation here.
... The Schedule S Tech Report shows a total of 92 TPN's. 76 Spots and 16 CONUS. However the 16 CONUS are redirected to PR and HI. Does that mean they are using 124 TWTA's??
Confusing, Yes. But that's what the data says.
I imagine D14 will use a similar if not exact TWTA arrangement for both the P.R. and HI. spotbeam that D10, 11, and 12 use for the redirected nationals on their Hawaiian spotbeam. They somehow apportion the 14 or 16 redirected national transponders over four active TWTAs (with four others as spares).
Whether that means 3-4 national transponders are assigned to each TWTA or some other I don't know. But obviously less TWTAs are necessary since the higher PFD of a SB largely compensates for having multiple transponders share 1 TWTA as opposed to the two parallel 130w TWTAs needed for each national transponder on the CONUS beam.
Edited by HoTat2, 25 May 2012 - 05:01 PM.