Ceil has one spot beam for Hawaii. Will not know how many transponders they will multiplex on it until we see it,
Ciel 2 Tracking
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Ceil has one spot beam for Hawaii. Will not know how many transponders they will multiplex on it until we see it,
2009 Jan 06 00:14:53 0.0308 S 138.0113 W 35785.850
CIEL-2
1 33453U 08063A 09006.04521624 .00000122 00000-0 10000-3 0 411
2 33453 000.0460 150.8360 0000658 166.2637 026.9085 01.00272545 289
CIEL-2
1 33453U 08063A 09006.04521624 .00000122 00000-0 10000-3 0 411
2 33453 000.0460 150.8360 0000658 166.2637 026.9085 01.00272545 289
I have been using this calculator for several years with no problems.
138.0113 W
I suppose it may have started moving in the last few hours, but the TLE has today's date.
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It seems likely to me that NORAD might hold off illuminating a DBS satellite while it's being tested. They don't want to be accused of damaging an expensive orbital asset.
Wow this is a quote for the Hall Of Fame! LOL Funny stuff. You know that NORAD santa stuff was all started because a local department store put out a phone number so kids could call in to the store and tell where Santa was. The number was 1 number different from the "Red phone" line at NORAD.
Seen that on the History Channel.
Hi nelson,
Your correct, one spot and according to the Schedule S database link you provided to me earlier, the Hawaii spot will have 5 transponders. As you said, we will need to wait and see it that becomes a reality.
The possibility exist for 7 HD channels per transponder for a total of 35 new ones for you in HI and us here in the deep freeze of AK. (only -30 right now). Dish will of course change over all the present 129 first and get around to HI and AK afterwords.
Am I not understanding how spotbeams work? I knew that a transponder could have multiple spotbeams sharing the same frequency (for non-overlapping DMAs), but I didn't know it was possible for a spotbeam to use multiple transponders. Or are there multiple transponders pointing spotbeams at Hawaii?
You are right, you would think anything for HI and AK is spotbeam anyway, unless of course they each has more than one LIL market.
Spot Beams
A spot beam is simply a feedhorn (antenna) pointed at the dish on the satellite at a specific angle and spacing from the dish to radiate a signal in a specific direction at a specific gain. The feed horn can be driven by one or more transponders. In the case of Hawaii, according to earlier information, it will have 5 transponders (tp 2, 4, 6, 14 and 16) on spot beam #55 (there are only 53 spot beams, but for some reason, they did not call any spot beams #2 and #3, so the spot beam numbering go to 55).
A spot beam is simply a feedhorn (antenna) pointed at the dish on the satellite at a specific angle and spacing from the dish to radiate a signal in a specific direction at a specific gain. The feed horn can be driven by one or more transponders. In the case of Hawaii, according to earlier information, it will have 5 transponders (tp 2, 4, 6, 14 and 16) on spot beam #55 (there are only 53 spot beams, but for some reason, they did not call any spot beams #2 and #3, so the spot beam numbering go to 55).
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That clarifies it to a point, but there must be more to it. The rationale for a spotbeam is to use the same transponder frequency for multiple locations, carrying different programming.
So there must be a way to specify that tp2s55 (for example) carries all Hawaii channels. The matrix would have to route one of nine (if it's a nine-to-one frequency reuse spotbeam) channel uplink packages for each of the five transponders to one feedhorn. Other spotbeam feedhorns might feed channels from the same or different combinations of transponders.
I assume that's possible, and that's what's happening, but I had no idea that it was being done for Ciel-2. Simple enough when you think about it.
Your right, I did not go into the uplink side of the transponder. You are correct and using your example of tp2, it is reused on spot beams 13, 17, 25, 28, 41, 43, 54 and 55 (nine times reuse).
