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Guest Message by DevFuse

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DIRECTV Satellite Discussion D-14


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1741 replies to this topic

#361 OFFLINE   Sixto

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Posted 07 November 2011 - 08:42 PM

Some good news for Directv's constellation (especially for the many millions of customers still receiving SD locals) . . . Directv has applied for a 9 year extension to their license for D4S based on estimated fuel use.

(LINK REMOVED - see below)

Yep, saw that over the weekend. Good stuff, shame D10 wasn't as fortunate.
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#362 OFFLINE   wmb

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Posted 07 November 2011 - 08:49 PM

Yep, saw that over the weekend. Good stuff, shame D10 wasn't as fortunate.


<Devil's Advocate Hat>
Well, if they'd just do away with that pesky MPEG2 SD broadcasts, this would be 9 more years of broadcasting those HD basics we all want.:rolleyes:
</Devil's Advocate Hat>

#363 OFFLINE   LameLefty

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Posted 07 November 2011 - 08:52 PM

<Devil's Advocate Hat>
Well, if they'd just do away with that pesky MPEG2 SD broadcasts, this would be 9 more years of broadcasting those HD basics we all want.:rolleyes:
</Devil's Advocate Hat>


Apples to oranges here. There are MILLIONS of customers still happily receiving SD channels. And D4S is a spot-beam satellite anyway. :)

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#364 ONLINE   cforrest

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Posted 07 November 2011 - 08:53 PM

Typical quirky-ass government website with odd-ball links. :) Try this one instead:

http://licensing.fcc...96318179&pgid=4


That worked, thanks! Linking from the FCC can be a PITA.

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#365 OFFLINE   cypherx

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Posted 08 November 2011 - 06:34 AM

Apples to oranges here. D4S is a spot-beam satellite anyway. :)


Is that what the S stands for in D4S?

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#366 OFFLINE   LameLefty

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Posted 08 November 2011 - 06:58 AM

Is that what the S stands for in D4S?


Yes, same as with D9S. Spot-beams were kind of a big deal in the late 90's/early 00's, and the satellites were designated that way to easily differentiate which ones were doing national beams and which were doing spots. Now, the current design trend is to include a mixture of national and spot-beam transponders and the 'S' has gone out of fashion.

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#367 OFFLINE   Sixto

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Posted 14 November 2011 - 06:58 PM

Arianespace to launch satellite for DIRECTV Latin America:

http://www.arianespa...011-DirecTV.asp


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#368 OFFLINE   lwilli201

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Posted 14 November 2011 - 07:38 PM

The last sentence in "About Arianespace" is interesting.

"It has a BACKLOG of 20 Ariane 5 and 17 Soyuz launches, equal to more than three years of business." (Emphasis mine)

Does this mean that they have 37 Sats in storage waiting for launch or should it state that they have contracts to launch 37 Sats in the next 3 years. Poorly worded I would think.
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#369 ONLINE   P Smith

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Posted 14 November 2011 - 07:46 PM

Contracts only - no one sat mfg will store their sats at launch facility for more then necessary (usually a months or so).

#370 OFFLINE   lwilli201

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Posted 14 November 2011 - 07:58 PM

Contracts only - no one sat mfg will store their sats at launch facility for more then necessary (usually a months or so).


That is what I thought. Not good to have Billions of dollars worth of Sats setting around. Just thought the wording was interesting. :D
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#371 OFFLINE   LameLefty

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Posted 15 November 2011 - 06:58 AM

The last sentence in "About Arianespace" is interesting.

"It has a BACKLOG of 20 Ariane 5 and 17 Soyuz launches, equal to more than three years of business." (Emphasis mine)

Does this mean that they have 37 Sats in storage waiting for launch or should it state that they have contracts to launch 37 Sats in the next 3 years. Poorly worded I would think.


Satellites are usually not delivered to the launch site until 2 - 4 weeks prior to launch, depending on the satellite and depending on the launch provider's policies. Most commercial satellite vehicles are delivered as essentially sealed packages - they are more or less "plugged into" the payload fairing of the launch vehicle by a team from the satellite manufacturer and the launch provider, installed at the top of the launcher vehicle and launched as soon as possible. Not a lot of waiting around at the launch site if it can be avoided.

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#372 OFFLINE   RobertE

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Posted 15 November 2011 - 04:46 PM

Oh snap. It just dawned on me that with the change in launch sites, we won't have our Russian "nominal" vixen. :(
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#373 OFFLINE   LameLefty

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Posted 01 December 2011 - 04:50 PM

RF nerds - some technical filings early this week pertaining to expected off-axis signal strengths for the future BSS satellites RB-1 and RB-2 but nothing earth-shattering (except that the charts submitted to the FCC have Space Systems/Loral logos, which is interesting).

RB-1:
http://licensing.fcc...50811903&pgid=2

RB-2:
http://licensing.fcc...50811903&pgid=2

And for anyone else who is NOT an RF nerd, there is nothing whatsoever of interest at these links. :lol:

Edited by LameLefty, 01 December 2011 - 05:38 PM.

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#374 OFFLINE   Davenlr

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Posted 01 December 2011 - 04:52 PM

RF nerds -


This is what those links return:

! Server Error: 102 (Severity 15, State 1, Line 1)

! Server 'HEIMDAL'

Incorrect syntax near ','.

Unable to access ib_licenses info


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#375 ONLINE   P Smith

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Posted 01 December 2011 - 06:48 PM

Some tidbits:
It's for Ground Station to 103W:

Frequency Lower: 17300 Frequency Upper: 25250
17.3-17.8 GHz Frequency Band
24.75-25.25 GHz Frequency Band
the spacecraft has 36 MHz transponders


Edited by P Smith, 01 December 2011 - 06:56 PM.


#376 ONLINE   doctor j

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Posted 01 December 2011 - 07:09 PM

This is what those links return:


Open in a new tab or window and it should work
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#377 OFFLINE   cypherx

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Posted 01 December 2011 - 07:15 PM

Do you think 8PSK modulation will be able to be used or is the signal to noise ratio and rain fade conditions unfavorable for such a higher order modulation rate?

- > Link to my setup thread< -

My  DirecTV HD WISHLIST:  NickJR, Nicktoons, Revolt.TV, FXM, We, Oxygen, The Hub, Fuse, GSN, Sprout, GAC, Esquire, MTV2, BBC World News, Ovation, Reelz , Sundance, Up, Music Choice Play HD (formerly SWRV), Al Jazeera America, Military Channel, NASA

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#378 ONLINE   doctor j

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Posted 01 December 2011 - 07:21 PM

RF nerds - some technical filings early this week pertaining to expected off-axis signal strengths for the future BSS satellites RB-1 and RB-2 but nothing earth-shattering (except that the charts submitted to the FCC have Space Systems/Loral logos, which is interesting).

RB-1:
http://licensing.fcc...50811903&pgid=2

RB-2:
http://licensing.fcc...50811903&pgid=2

And for anyone else who is NOT an RF nerd, there is nothing whatsoever of interest at these links. :lol:


REALLY:158 out of 167 pages of spectrum analyzer ocilloscope diagrams!!

What does all this really mean??

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#379 ONLINE   P Smith

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Posted 01 December 2011 - 10:43 PM

A lot :) - at least for that devices what located around that 8m transmitting antenna. Include TV, DVR, pacemakers in nearest town ...

#380 ONLINE   P Smith

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Posted 01 December 2011 - 10:45 PM

Do you think 8PSK modulation will be able to be used or is the signal to noise ratio and rain fade conditions unfavorable for such a higher order modulation rate?


Huh ?
The 8PSK modulation already in use those Ka bands off 99W and 103W clusters.




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