That seems like a valid reason. Do you know if this is indeed the reason for Chandrayaan 2....?disha wrote:Tracking and communication. Particularly tracking and communication required by partner space agencies and tracking & comm stations. Each launch sequence needs a commitment on time and resource allocation from partner agencies/tracking stations. This is pure logistics.JayS wrote:Could that be due to some other planned launch from the same launch pad..?
Indian Space Program: News & Discussion - Sept 2016
Re: Indian Space Program: News & Discussion - Sept 2016
Re: Indian Space Program: News & Discussion - Sept 2016
https://twitter.com/isro/status/1062575000278822917
The filling of fuel (UH25) and oxidiser (N2O4) in L110 stage has been completed for today's 17:08 (IST) launch of #GSLVMkIIID2 carrying #GSAT29 from SDSC SHAR Sriharikota. Watch this space for all updates.
The filling of fuel (UH25) and oxidiser (N2O4) in L110 stage has been completed for today's 17:08 (IST) launch of #GSLVMkIIID2 carrying #GSAT29 from SDSC SHAR Sriharikota. Watch this space for all updates.
Re: Indian Space Program: News & Discussion - Sept 2016
What is the shelf life of the solid rocket motor once it has been assembled (all the segments are attached) - is there a time limit by when you have to use it?
Re: Indian Space Program: News & Discussion - Sept 2016
I dont know about ISRO launch vehicle specific info but generically speaking solid rockets have very long shelf life, hence they are preferred for Missile application which need shelf life running into a decade or two. The liquid rockets have much smaller shelf life and they have to be fueled just before the launch. The life may vary for liquid fuels ranging from hypergolic fuels to semi cryo to full cryo.
Re: Indian Space Program: News & Discussion - Sept 2016
http://www.dtic.mil/dtic/tr/fulltext/u2/763879.pdf
lot of variables
https://www.sciencedirect.com/science/a ... 6118302619
Table 6. Correlation between normal and accelerated aging time.
Temperature (°C) Aging condition Time unit Aging time
25 Normal year 2 5 8 10 13 15 20 25
65 Accelerated day 20 45 75 95 120 140 190 235
week 2.8 6.4 10.7 13.5 17.1 20 27.1 33.5
lot of variables
https://www.sciencedirect.com/science/a ... 6118302619
Table 6. Correlation between normal and accelerated aging time.
Temperature (°C) Aging condition Time unit Aging time
25 Normal year 2 5 8 10 13 15 20 25
65 Accelerated day 20 45 75 95 120 140 190 235
week 2.8 6.4 10.7 13.5 17.1 20 27.1 33.5
Re: Indian Space Program: News & Discussion - Sept 2016
AFAIK, the segments are cast a few months before.
Re: Indian Space Program: News & Discussion - Sept 2016
Clear skies over SHAR
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Re: Indian Space Program: News & Discussion - Sept 2016
Mission board gives a GO
Re: Indian Space Program: News & Discussion - Sept 2016
Auto launch sequence has started.
D2 stands for second developmental flight. After successful launch of this mission GSLV MK3 will be declared as "Operational".
Since the Sat is going to focus on provide high bandwidth connectivity to J&K and NE, it could be a key capability for Defense perspective as well. Is this something that is planned..? That is whether the bandwidth would be used by our AFs as well in some sense..?
D2 stands for second developmental flight. After successful launch of this mission GSLV MK3 will be declared as "Operational".
Since the Sat is going to focus on provide high bandwidth connectivity to J&K and NE, it could be a key capability for Defense perspective as well. Is this something that is planned..? That is whether the bandwidth would be used by our AFs as well in some sense..?
Re: Indian Space Program: News & Discussion - Sept 2016
- 5 mins to launch..
Re: Indian Space Program: News & Discussion - Sept 2016
naarmal lift off wonly
Re: Indian Space Program: News & Discussion - Sept 2016
Performance of solid boosters normal.
Re: Indian Space Program: News & Discussion - Sept 2016
A female voice reading out the countdown..
Lift off naarmal
Lift off naarmal
Re: Indian Space Program: News & Discussion - Sept 2016
L110 ignition. Normal performance.
Re: Indian Space Program: News & Discussion - Sept 2016
112s: L110 ignited. Normal
Last edited by JTull on 14 Nov 2018 17:26, edited 3 times in total.
Re: Indian Space Program: News & Discussion - Sept 2016
Solid Boosters separate.
Re: Indian Space Program: News & Discussion - Sept 2016
139.8s: S200s separated
Last edited by JTull on 14 Nov 2018 17:21, edited 1 time in total.
Re: Indian Space Program: News & Discussion - Sept 2016
HSS separation
Re: Indian Space Program: News & Discussion - Sept 2016
Performance looks slightly better than expected.
Re: Indian Space Program: News & Discussion - Sept 2016
230.8s: Heat Shield separated
Re: Indian Space Program: News & Discussion - Sept 2016
The ISRO top brass look chill.. Confidence levels must be very high
Re: Indian Space Program: News & Discussion - Sept 2016
All events can be seen on screen.
Re: Indian Space Program: News & Discussion - Sept 2016
C25 stage ign command given. L110 separtaes. C25 ignites
Re: Indian Space Program: News & Discussion - Sept 2016
324.8s: C25 ignition confirmed
Re: Indian Space Program: News & Discussion - Sept 2016
C25 performance normal
Re: Indian Space Program: News & Discussion - Sept 2016
The web streaming sucks.. as per frickin usual
Re: Indian Space Program: News & Discussion - Sept 2016
HD quality here.sudhan wrote:The web streaming sucks.. as per frickin usual
Re: Indian Space Program: News & Discussion - Sept 2016
Thanks! Looks much better. Time for a susu break while the C25 does its thing
Re: Indian Space Program: News & Discussion - Sept 2016
Once the closed loop guidance kicked in at around 150s the gaps was brought down. Till then slightly better performance than predicted. In next launch we will see the gap gone as the predicted trajectory will be fined tuned.JayS wrote:Performance looks slightly better than expected.
Re: Indian Space Program: News & Discussion - Sept 2016
Everything totally normal.
Re: Indian Space Program: News & Discussion - Sept 2016
Looks like a very precise orbit injection.
Re: Indian Space Program: News & Discussion - Sept 2016
C25 shutoff
GSAT separated
GSAT separated
Re: Indian Space Program: News & Discussion - Sept 2016
Mission Accomplished. Congrats ISRO.
Re: Indian Space Program: News & Discussion - Sept 2016
Handshakes all around. Time to dump GSLV MK3 to the PSLV pile
Re: Indian Space Program: News & Discussion - Sept 2016
I just love the Shuddh Hindi commentary. In fact when he uses some Urdu or English word it almost makes me annoyed about it.
The other day I was watching a video on how NASA manages to show uber class videos of launches. They developed high class cameras, some of which are put of Anti-aircraft gun mounts and RADAR controlled with very high focal length lenses (like 4500mm) and which are constantly upgrades. I doubt ISRO has anything remotely close to it. The main aim for NASA's efforts on camera development is to gather engineering data. Awesome footage for jingos is a by-product.
And we have successful insertion. So now GSLV is soon to be officially "Operational".
The other day I was watching a video on how NASA manages to show uber class videos of launches. They developed high class cameras, some of which are put of Anti-aircraft gun mounts and RADAR controlled with very high focal length lenses (like 4500mm) and which are constantly upgrades. I doubt ISRO has anything remotely close to it. The main aim for NASA's efforts on camera development is to gather engineering data. Awesome footage for jingos is a by-product.
And we have successful insertion. So now GSLV is soon to be officially "Operational".
Re: Indian Space Program: News & Discussion - Sept 2016
another vehicle operationalized, congrats
Re: Indian Space Program: News & Discussion - Sept 2016
Dr. Sivan declares the "Fat boy" GSLV Mk3 operational..