Launch of new Satellite - Anik-G1 - Page 12 - Canadian TV, Computing and Home Theatre Forums
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post #166 of 290 (permalink) Old 2013-03-27, 12:39 AM
 
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Good stuff, thanks for the updates guys!
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post #167 of 290 (permalink) Old 2013-03-27, 01:23 AM
 
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It would appear that the spacecraft has separated and the launch is a success. Barring any unexpected problems during todays mission I'd say this is encouraging for Anik G1 in April.
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post #168 of 290 (permalink) Old 2013-03-30, 12:00 AM
 
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Anik G1 Mission Has Started

If you go to the ILSlaunch page they now have Anik G1 listed as the current mission and the first few steps have already been completed!
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post #169 of 290 (permalink) Old 2013-03-30, 10:21 AM
 
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Just noticed that also.
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post #170 of 290 (permalink) Old 2013-04-02, 11:40 AM
 
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Anik G1 has been loaded with its 15 years of fuel. Next up is the beginning of joint operations and fuelling of the Breeze M orbital unit.
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post #171 of 290 (permalink) Old 2013-04-03, 02:04 AM
 
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Quote:
Originally Posted by Raptor256 View Post
Anik G1 has been loaded with its 15 years of fuel. Next up is the beginning of joint operations and fuelling of the Breeze M orbital unit.
Somehow I always thought Satellites were either Solar, or in rare cases Nuclear powered. What is the on board Fuel these days?

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post #172 of 290 (permalink) Old 2013-04-03, 02:12 AM
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I believe they mean propellant for in orbit adjustments.
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post #173 of 290 (permalink) Old 2013-04-03, 10:01 AM
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Yes, the propellant "fuel" is for orbit keeping. The satellite electronics are powered by solar panels. deep space probes are usually nuclear powered, never earth communication satellites; they are solar.

It is really the life of the propellant that decides the useful life of a satellite.
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post #174 of 290 (permalink) Old 2013-04-04, 12:03 PM
 
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That's all basically correct. There is lots of study going on as to how we can keep satellites on orbit longer, as our ability to make electronics that last a long time in space has exceeded our ability to keep satellites in orbit. Technologies such as on orbit refuelling and ion thrusters may allow us to fix the issue. There is also a limitation with regards to how much weight current launch systems can put into GTO.
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post #175 of 290 (permalink) Old 2013-04-04, 06:56 PM
 
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One of the original proposed uses of the Space Shuttle was to service, repair, and retrieve satellites, but like most of today's electronics it cheaper to replace them.
So Anik G1 is to goes up and we hope it doesn't get hit by any space junk!

If Life is a Highway,...then why is there no end to this dirtroad?
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post #176 of 290 (permalink) Old 2013-04-04, 09:51 PM
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There are other limits to useful satellite life, such as decline in transponder output and power failures. Considering the environment at 24,000 miles, most satellites are not going to be fully usable much beyond 15 years. They can be hardened against radiation and damage from space debris but weight, again, limits that.

The real problem is the amount of time it takes to deploy a new satellite. They are very complex, custom built and the process takes years. It is possible to move retired satellites into place to make up for damaged or partially failed satellites in use. Bell did that with N1 and N2. (N1 operated beyond it's design life with partial functionality and N2 suffered a partial failure soon after deployment.)
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post #177 of 290 (permalink) Old 2013-04-04, 10:47 PM
 
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http://www.spaceflight101.com/anik-g...h-updates.html

Apparently, the launch is scheduled for April 15th at 18:36 UTC.
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post #178 of 290 (permalink) Old 2013-04-05, 08:59 PM
 
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@ dirtroad,

your info regarding the Space Shuttle is incorrect.

The Shuttle only operated at an orbit of around 300 km., and could never have retrieved a satellite at 35,000 km.
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post #179 of 290 (permalink) Old 2013-04-06, 02:50 AM
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Not every satellite is at geosynchronous orbit. Google shuttle satellite retrieve ...You should apologize.

http://rammb.cira.colostate.edu/dev/...le-related.htm
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post #180 of 290 (permalink) Old 2013-04-06, 08:58 PM
 
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@gzink,

Nothing to apologize for, because I didn't say/do anything wrong or offensive.

We are talking about TV satellites here (Bell, Shaw, DirecTV, etc...), and it is my opinion that the Space Shuttle, being a Low Orbit Spacecraft, was not designed to go up to 35,000 km. and retrieve T.V. satellites for service, replacement, etc...

dirtroad and I have spoken by P.M. already.
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