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Sky & Satellite Weekly News Thread, Week #31


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Old 05-08-2011, 19:17
Analoguesat
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Sadly despite much pressure on SES we havent been able to persuade them to carry tomorrow nights Astra 1N launch on 28E.

If anyone without multisat capability wants to watch have a look here -

http://www.videocorner.tv/index.htm

coverage should start about 2230 BST for a 2253 lift off. (Assuming no more delays)

If you are semi interested its worth watching at least the launch and first few minutes of the climbout - the Ariane 5's look fabulous as they take off
Launch postponed due to bad weather at Kourou

EDIT - they will try again tomorrow.
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Old 05-08-2011, 21:08
Richardcoulter
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Perhaps it's Karma for not covering it on 28E
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Old 06-08-2011, 18:01
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54218 - PID's all zero'd
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Old 06-08-2011, 19:40
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I was away in Westwood Ho!, Devon. £18 a week for wi-fi intranet .
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Old 06-08-2011, 19:42
Analoguesat
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Arianespace will try again tonight to get Astra 1N into the air.
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Old 06-08-2011, 19:42
Analoguesat
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I was away in Westwood Ho!, Devon. £18 a week for wi-fi intranet .
Stuff that - cheaper to go and find a cafe somewhere with free access
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Old 06-08-2011, 20:19
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Stuff that - cheaper to go and find a cafe somewhere with free access
Was stuck with wife and kids. Visited The Big Sheep, which has a cafe with wi-fi but wife wouldn't let me, chalet was mouldy loaads of mildew, am happy to be gone with the cost of it all. 600 quid for a week.
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Old 06-08-2011, 20:30
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Westward Ho ! Welcome to North Devon....the Big Sheep. Wonderful place. No I mean it....was there just the other day considering installing a radio transmitter site there
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Old 06-08-2011, 22:11
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Since these threads recently seem to have turned into ones summarising the TV you can get on holiday:

I was in Croatia on the island of Lopud near Dubrovnik, and with my indoor aerial, I could receive... absolutely nothing, analogue UHF/VHF, or DVB-T UHF. The guesthouse had no TV system for me to check.

I am now in Mostar in Bosnia & Herzegovina. The hotel (Villa Fortuna) has a good TV system with quite a few English channels (CNN, lots of Discovery channels, Nat Geo, and Cartoon Network IIRC), but my brother is currently watching Nat Geo so I won't yank the aerial out and check all the channels with my laptop. Instead, I'll list the (surprisingly many) channels I could receive at a watchable quality with my indoor aerial at the window:

R12 - BHT 1
E7 - FTV
E12 - BHT 1
21 - OBN
23 - FTV
26 - BHT 1
28 - mreza RTM
30 - mreza RTM
51 - mreza HTV
57 - Pink BH
60 - HTV Mostar


I notice a lot of duplication, and channels being simulcasted on UHF and VHF, all in PAL colour. I was using the europe-east profile in mplayer, I assume that's the correct one to use here - if not, post before tomorrow and I'll do more scans with a different one.


BHT 1 is the national public network, FTV seems to be the big regional public one, OBN, the mreza channels and Pink BH are the big commercial ones (though I don't know which are national and which are regional), and HTV Mostar was the very, very local one that isn't even really broadcasting at the moment (just showing pictures and music and contact details).


No DTT whatsoever, despite very good analogue pictures - a bit of browsing tells me there won't be any until at least Spring 2012.
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Old 06-08-2011, 22:45
jzee
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Arianespace will try again tonight to get Astra 1N into the air.
7 minutes & counting on the live feed.

EDIT: countdown stopped due to high altitude winds.
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Old 06-08-2011, 22:52
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If theres any delay they always hold at T-7 mins. Should there be a hold at less than T-7 mins they have to reset to 7.00 as this is when what they call the "synchronised sequence" starts This is basically the ground equipment starts to hand over control to the rocket computers
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Old 06-08-2011, 22:57
jzee
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If theres any delay they always hold at T-7 mins. Should there be a hold at less than T-7 mins they have to reset to 7.00 as this is when what they call the "synchronised sequence" starts This is basically the ground equipment starts to hand over control to the rocket computers
Interesting, thanks. When is the next chance for blast off?
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Old 06-08-2011, 23:05
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There is a "launch window" in which both the satellites can be placed into the correct orbits. Tonights is a long one - over an hour so we have plenty of time for the weather to clear yet.
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Old 06-08-2011, 23:10
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Theres a good explanation of the synchronised sequence in the launch kit:

Appendix 3. The synchronized sequence
The synchronized sequence starts 7 mn before ignition (T-0), it is primarily designed to perform the final
operations on the launcher prior to launch, along with the ultimate checks needed following switchover to
flight configuration. As its name indicates, it is fully automatic, and is performed concurrently by the onboard
computer and by two redundant computers at the ELA 3 launch complex until T-4 seconds.
The computers command the final electrical operations (startup of the flight program, servocontrols, switching
from ground power supply to onboard batteries, etc.) and associated checks. They also place the propellant and
fluid systems in flight configuration and perform associated checks. In addition, they handle the final ground
system configurations, namely:
• Startup of water injection in the flame trenches and jet guide (T-30 sec).
• Hydrogen aspiration for chilldown of the Vulcain engine in the jet guide (T-18 sec).
• Burnoff of hydrogen used for chilldown (T-5.5 sec).
At T-4 seconds, the onboard computer takes over control of final engine startup and lift-off operations:
• It starts the ignition sequence for the Vulcain main stage engine (T-0).
• It checks engine operation (from T+4.5 to T+7.3 sec).
• It commands ignition of the solid boosters for immediate lift-off at T+7.3 seconds.
Any shutdown of the synchronized sequence after T-7 mn automatically places the launcher back in its
T-7 min configuration.

http://www.arianespace.com/images/la...c-JCSAT-EN.pdf
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Old 06-08-2011, 23:16
Analoguesat
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Incidently as they have 2 big birds on board Arianespace are using the ECA configuration of the rocket and a long fairing. The ECA is the heavylift workhorse and can be identified as it has the yellow arms connected to the rocket that pull away 5 seconds before launch. The lighter stuff (eg the transfer vehicles that go the the Space Station) use the ES configuration and dont need the tanks topping up until the last seconds
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Old 06-08-2011, 23:31
Radio Ruderham
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54218 - PID's all zero'd
Txp# F4U 12.643 V.
54218______No Signal (obrienmichael05)
Sorry
Already listed old son, Check the first posts and scroll down
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Old 06-08-2011, 23:59
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Ariane space now back on "Live"
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Old 07-08-2011, 00:07
jzee
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Missed it, any video of it going to be uploaded anywhere?
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Old 07-08-2011, 00:13
Scrapanatchi
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they'll be on the videocorner site later.
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Old 07-08-2011, 00:18
jasonjimbob
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i have put the launch of Astra 1N on to my HDD/DVD/VCR combi. i will be transfering it on to DVD later. if any 1 wants a copy let me know.
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Old 07-08-2011, 00:23
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Missed it, any video of it going to be uploaded anywhere?
Found it on YouTube
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Old 07-08-2011, 00:30
Radio Ruderham
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Excitement over,
Every body back to beddie byes,
no-one hurt, not even the fireflies.
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Old 07-08-2011, 00:32
jzee
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Thanks m8.
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Old 07-08-2011, 00:35
Analoguesat
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Excitement over,
Every body back to beddie byes,
no-one hurt, not even the fireflies.
Spoilsport
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Old 07-08-2011, 00:40
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I was away in Westwood Ho!, Devon. £18 a week for wi-fi intranet .
Phew that's expensive! Have you got a PAYG 3G internet dongle for travel? I have one for travel when I'm in the UK.

Since these threads recently seem to have turned into ones summarising the TV you can get on holiday
Haha I'll be going to Germany in a week or two and I'll also be staying a night in Luxembourg so I will report on the TV in the various hotels here in these threads Any CNBC in the hotel in Croatia? Is the internet free?
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