Turkish Space Programs

[Constantinople]

...


Göktürk-1 (Type Pleiades)









Pleiades ‘Primary Mirror’ ('Primary Mirror size of 650 mm diameter)






...

That was today ?

 

[Bubblegum Crisis]

That was today ?

May 21, 2015.

 

[Glass]

https://en.wikipedia.org/wiki/Göktürk-1 its late 2016 now when do they send thsi satelite to space?​

 

[Bubblegum Crisis]

https://en.wikipedia.org/wiki/Göktürk-1 its late 2016 now when do they send thsi satelite to space?​

Gokturk 1

Vega (designated VV08)

Dec. 5, 2016

Launch time: 1352:09 GMT (8:52:09 a.m. EST)

Launch site: ZLV, Kourou, French Guiana



Source : http://spaceflightnow.com/launch-schedule/


...

 

[Silahtar]

Gokturk-1A in French Guiana

 

[Silahtar]

 

[Pax Ottomana]

Let's do a quick recap...

Contract start: July 13, 2009
Customer: Turkish MoD
Manufacturer: TAI, Telespazio, Thales Alenia Space, Aselsan
Orbit: Polar LEO, Sun-synchronous
Lifespan: 9 years
Main Payload: Visual/Near IR Camera (resolution: >50cm - <81 cm)
Launch firm/date/location: Arianespace. 08.12.2016, Kourou-French Guinnea
Mission: Military reconnaissance, mapping and planning, landcover survey, geology-ecology monitoring, disaster management and environmental control

An old picture but one of my favorites; showing the satellite and the high-res camera in all its might.

 

[xenon54 out]

Lifespan: 9 years

What does that mean, its only operational for 9 years?

 

[revojam]

What does that mean, its only operational for 9 years?

Expected lifespan for sattellite, of course it can last longer too.

 

[xenon54 out]

Expected lifespan of course it can last longer too.

Sure but isnt it a little bit short?

ISS which is much more complex has something like 20 years if is remember correctly.

 

[Tsenal]

Sure but isnt it a little bit short?

ISS which is much more complex has something like 20 years if is remember correctly.

ISS is manned and maintained by astronauts.

 

[yason]

Sure but isnt it a little bit short?

ISS which is much more complex has something like 20 years if is remember correctly.

If i am right, it has to do with that the orbit of the spy sattelite is lower than that of the ISS.

 

[Pax Ottomana]

Among other things, it has to do with the amount of FUEL the satellite carries for trajectory correction, orbit maintenance and attitude control. In addition to occasionally needing to fire its "mini boosters" to counter for orbital decay, recon satellites also need to spend fuel to point their cameras at "targets of interest". Without these regular "boosts" in desired directions, the satellite would just tumble around in space without control and be useless. Since it has a fixed amount of fuel for such maneuvers, it has a fixed lifespan, at the end of which they use the last bit of fuel to slow the satellite down so that it'd reenter the atmosphere and burn up, avoiding becoming space junk.

P.S. ISS has been around for much longer and will stay around longer but remember, every time they dock with it, they resupply it with fuel (and other things the astronauts need). That's not the case for satellites.

 

[what]

Does gavity still pull lets say satelites towards the earth at those altitudes?

 

[Pax Ottomana]

Does gavity still pull lets say satelites towards the earth at those altitudes?

Yes, of course. Gravity is in effect at any distance, there's no limit.

Satellites are constantly "falling" towards the earth. The reason they don't actually crash it is because they also have a lot of forward momentum. As they fall, the earth curves away from them, so effectively they're orbiting it.