Post by: sanman on 01/10/2014 03:29 am
http://www.newindianexpress.com/states/kerala/GSLV-D5-Twin-may-be-Launched-This-Year/2014/01/10/article1992628.ece (http://www.newindianexpress.com/states/kerala/GSLV-D5-Twin-may-be-Launched-This-Year/2014/01/10/article1992628.ece)
Quote
The ISRO hopes to launch the ‘twin’ - GSLV-D6 - by July or August this year, ISRO officials said.
“The GSLV-D6 mission will ditto the GSLV-D5 which was used for the January 5 launch. It will build our confidence in the technology,” M C Dathan, director of ISRO’s Liquid Propulsion Systems Centre (LPSC), told ‘Express’.
The home-made cryogenic engine, which will power the upper stage of GSLV-D6, is “three-fourths” ready. Tests are currently underway on it, he said.
No word on what the payload is going to be.
Post by: vyoma on 01/10/2014 03:37 am
Quote
Like the GSLV D-5, D6 too will have a communication satellite of the GSAT series as payload.
By the way, 4m diameter fairing will be tested in GSLV D6.
Post by: sanman on 01/10/2014 03:48 am
http://www.thehindu.com/todays-paper/tp-national/isro-gets-ready-for-next-gslv-flight-with-indigenous-cryogenic-engine/article5543389.ece
Quote
Flush with the success of the GSLV-D5, which used an indigenous cryogenic stage to put the GSAT-14 into orbit, the Indian Space Research Organisation is getting ready for the next GSLV flight with its own cryogenic engine within a year. It will put the communication satellite GSAT-6 into orbit.
So presumably this July/Aug flight will be carrying GSAT-6
Post by: antriksh on 01/10/2014 12:13 pm
(http://www.sac.gov.in/SACSITE/GSAT-6_files/image001.jpg)
(http://www.isro.org/rep2010/image/Unfurlable-antenna.jpg)
(http://www.isro.org/rep2010/image/Unfurlable-antenna2.jpg)
Post by: vyoma on 01/23/2014 12:25 am
Quote
The next GSLV flight with an indigenous cryogenic engine can be within a year. The GSLV has been identified for Chandrayaan-2. Once we make one more successful launch, we can confidently assign it for Chandrayaan-2. We are sure we will be able to repeat the success.
On GSLV Mk2 payload capacity:
Quote
The April 15, 2010 flight, which was the first to use India’s own cryogenic stage, was to put a GSAT that weighed 2,220 kg into orbit. But GSLV-D5 used a 1,983-kg GSAT-14. So, the payload was lighter by 240 kg in the successful GSLV-D5 mission. Does this detract from its success?
After we faced the failure of GSLV-D3 and lost the GSAT-4 satellite, we thought it was prudent to play it safe and keep the primary mission objective of GSLV-D5 as proving the indigenous cryo stage in flight with the deployment of a satellite as an additional bonus. As such, we planned a lighter GSAT-14 with fewer transponders to keep the cost low. Also, the urge to make the CUS more robust in this second attempt, especially after the GSLV-F06 failure, attributed to the deflection and breaking of the shroud in the cryo stage, did indeed increase the inert weight of the CUS in GSLV-D5. All these factors made us attempt GSLV-D5 with GSAT-14 weighing less than GSAT-4 of GSLV-D3. However, this in no way brings down the significance of proving successfully the indigenous cryo stage. The restoration of payload to two-tonne-plus will happen in the very next flight through the optimisation of inert mass and a realistic pruning of margins.
I can confidently say that once we have a working cryo stage and the GSLV, enhancing its performance or payload incrementally is bound to happen in subsequent flights, as demonstrated in the case of the PSLV.
http://www.frontline.in/cover-story/will-be-able-to-repeat-the-success/article5590227.ece
Post by: kanaka on 02/08/2014 10:06 am
Post by: vyoma on 02/08/2014 01:16 pm
What could be the thrust produced by Cryogenic Engine to be used in GSLV-D6 Mk II - GSAT-6? Any advanced version of cryogenic will be used?
News reports are calling it D5's twin :) It's being discussed here: http://forum.nasaspaceflight.com/index.php?topic=33771.0
Post by: input~2 on 04/05/2014 12:11 pm
Post by: vyoma on 07/24/2014 01:37 am
Quote
The GSLV project has successfully launched GSLV-D5 flight with indigenous Cryogenic engine and stage on 5th January 2014 from Satish Dhawan Space Centre, Sriharikota and is currently preparing for the next flight GSLV namely, GSLV-D6.
http://pib.nic.in/newsite/erelease.aspx?relid=107283
Post by: vyoma on 07/31/2014 04:45 pm
http://pib.nic.in/newsite/erelease.aspx?relid=107739
Quote
Cryogenic engine required for next flight GSLV-D6 is also prepared and is undergoing acceptance testing.
http://pib.nic.in/newsite/erelease.aspx?relid=107740
Quote
So far, eleven cryogenic engines for GSLV and two higher thrust cryogenic engines for GSLV Mk-III have been realized.
Post by: vyoma on 10/30/2014 02:06 am
http://www.thehindu.com/news/national/gsat6-slated-for-march-launch/article6545929.ece
GSAT-6 satellite info:
http://sac.gov.in/SACSITE/GSAT-6.html
Post by: antriksh on 10/30/2014 03:15 am
Post by: vineethgk on 10/30/2014 01:19 pm
This satellite is now reserved for strategic applications.
I wonder what the possible military applications could be. Encrypted direct satellite communication for satellite phones and other mobile communication devices for use by the three services?
Post by: vyoma on 10/30/2014 02:40 pm
This satellite is now reserved for strategic applications.
I wonder what the possible military applications could be. Encrypted direct satellite communication for satellite phones and other mobile communication devices for use by the three services?
Maybe. Indian Navy is already using GSAT-7/Rukmini (http://timesofindia.indiatimes.com/india/Navy-validates-massive-exercise-under-countrys-first-military-satellites-gaze/articleshow/31225807.cms) to enable encrypted comms network across its assets.
Post by: chota on 02/04/2015 08:54 pm
Quote
Does anyone know when the GSLV D6 Launch will take place ? According to SpaceFlightNow.com, the launch schedule seems to have slipped to May this year from March.
Between July and August 2015 (http://www.deccanchronicle.com/150205/technology-science-and-trends/article/isro-put-7-singapore-satellites-orbit)
Post by: kanaka on 02/06/2015 03:34 am
QuoteDoes anyone know when the GSLV D6 Launch will take place ? According to SpaceFlightNow.com, the launch schedule seems to have slipped to May this year from March.
Between July and August 2015 (http://www.deccanchronicle.com/150205/technology-science-and-trends/article/isro-put-7-singapore-satellites-orbit)
Seems cryogenic engine would be ready by that time.
Post by: vyoma on 04/18/2015 05:45 am
Quote
The second [GSLV Mk2] launch has been planned for July this year. Two more launches will happen in 2016, and it will carry communication satellites in all these trips.
Post by: input~2 on 04/29/2015 01:09 pm
source: http://www.thehindu.com/news/cities/chennai/isro-on-a-mission-spree/article7148571.ece
Post by: vyoma on 05/20/2015 04:02 pm
http://www.ndtv.com/india-news/isro-to-launch-satellite-for-strategic-applications-764727
Quote
"We will launch GSAT-6 for strategic applications in July-end or August beginning, with a special antenna that will have a capability to use a handheld device to communicate from anywhere," Indian Space Research Organisation (ISRO) chairman AS Kiran Kumar told reporters in Bengaluru.
ISRO will use a heavy rocket - geosynchronous satellite launch vehicle (GSLVA Mark II) to launch the 2-tonne GSAT-6 with 10 special transponders from its spaceport at Sriharikota in Andhra Pradesh.
Post by: vyoma on 05/20/2015 04:15 pm
Quote
“We will launch GSAT-6 for strategic applications in July-end or August beginning, with a special antenna that will have a capability to use a handheld device to communicate from anywhere,” Indian Space Research Organisation (ISRO) chairman A.S. Kiran Kumar told reporters here.
ISRO will use a heavy rocket – geosynchronous satellite launch vehicle (GSLVA Mark II) to launch the 2-tonne GSAT-6 with 10 special transponders from its spaceport at Sriharikota in Andhra Pradesh.
“The six-metre diameter antenna will be one of the scientific instruments onboard the satellite. We are making optical instruments for measurements using optimal techniques,” Kiran Kumar said on the margins of a function here.
The instruments are also used in telescopes of 1.2 metre and 0.7 metre mirrors, which are measured to nanometer accuracy.
Post by: vyoma on 05/21/2015 09:10 am
Quote
BENGALURU: The country’s premier space agency Indian Space Research Organisation (ISRO) is currently working on launching the INSAT-4E along with other missions in the coming six months, according to its chairman A S Kiran Kumar.
Speaking on the occasion of World Metrology Day in the city on Wednesday, Kumar said that the 2,000 kg INSAT-4E, carrying five transponders, would be launched in July or August as the GSAT-6 mission.
The satellite will offer a Satellite Digital Multimedia Broadcasting (S-DMB) service. To be launched with various optical intruments, the GSAT-6 will also provide other services to mobile phone users and vehicles.
The satellite will also have a rubidium atomic clock which will help in several other scientific experiments, Kumar said.
“We are working on prototypes of GSAT 17, 18 and 19 which will have more than 48 transponders,” he said, adding that this was part of ISRO’s aim to reduce the dependence on foreign products.
Post by: vyoma on 05/30/2015 04:54 am
Quote
This mission will be followed by the GSLV D-6 mission, which will be a ditto version of the GSLV D-5 which successfully flight-tested the India-built cryogenic engine in December 2014.
“This mission will be in August and will validate the cryo stage. The cryo stage is being integrated at the IPRC, Mahendragiri,” S Somanath, the new director of LPSC, said.
Post by: Steven Pietrobon on 06/01/2015 06:31 am
Post by: antriksh on 06/22/2015 02:03 pm
Post by: vyoma on 06/28/2015 04:57 pm
Quote from: Google Translate
Nagercoil: Vikram Sarabhai Space Centre in Thiruvananthapuram and Nagercoil director Shiva arrived yesterday. He told reporters: kirayojenik engine testing tasks are fully completed. Following the launch of the rocket is called PSLV C -28. Lighting satellites for disaster management of the rocket carrying the tiemsi -3. On the July 10 launch preparations are underway to launch. For more information contact jieselvi T -6 rocket with the satellite scheduled for launch in August, will come.
Cryogenic engine testing has been completed. Launch scheduled in August.
Post by: vineethgk on 06/28/2015 06:05 pm
Post by: seshagirib on 06/29/2015 02:54 pm
http://www.dinakaran.com/News_Detail.asp?Nid=152986Quote from: Google TranslateNagercoil: Vikram Sarabhai Space Centre in Thiruvananthapuram and Nagercoil director Shiva arrived yesterday. He told reporters: kirayojenik engine testing tasks are fully completed. Following the launch of the rocket is called PSLV C -28. Lighting satellites for disaster management of the rocket carrying the tiemsi -3. On the July 10 launch preparations are underway to launch. For more information contact jieselvi T -6 rocket with the satellite scheduled for launch in August, will come.
Cryogenic engine testing has been completed. Launch scheduled in August.
What type of testing? Do they "hot" test the flight engine?
Post by: antriksh on 07/02/2015 02:27 pm
http://www.dinakaran.com/News_Detail.asp?Nid=152986Quote from: Google TranslateNagercoil: Vikram Sarabhai Space Centre in Thiruvananthapuram and Nagercoil director Shiva arrived yesterday. He told reporters: kirayojenik engine testing tasks are fully completed. Following the launch of the rocket is called PSLV C -28. Lighting satellites for disaster management of the rocket carrying the tiemsi -3. On the July 10 launch preparations are underway to launch. For more information contact jieselvi T -6 rocket with the satellite scheduled for launch in August, will come.
Cryogenic engine testing has been completed. Launch scheduled in August.
What type of testing? Do they "hot" test the flight engine?
just like the last launch where the engine was HOT and HAT tested, this one will also go through the same process. they might drop the HAT.
Post by: vineethgk on 07/06/2015 04:53 pm
Quote
Meanwhile, the GSAT6 communication satellite is expected to reach Sriharikota space port on July 6 after it was flagged off from Bengaluru, the official said on the condition of anonymity.
He said the GSAT6 communication satellite will be put into space aboard a heavier rocket called geosynchronous satellite launch vehicle (GSLV).
The GSLV rocket's first stage/engine has been assembled and the activities relating to that rocket assembly are progressing smoothly.
Source (http://gadgets.ndtv.com/science/news/isro-to-launch-5-british-satellites-on-friday-711856)
Post by: worldtimedate on 07/19/2015 11:38 pm
Post by: Steven Pietrobon on 07/20/2015 05:02 am
Post by: input~2 on 07/28/2015 07:03 pm
http://www.hindustantimes.com/india-news/looking-beyond-mars-the-indian-space-odyssey/article1-1373306.aspx
Post by: m.prasad on 07/31/2015 01:58 pm
Thx
~Prasad
Post by: chota on 07/31/2015 10:09 pm
It says stage 1 & 2 are already stacked up. Awaiting cryo stage and satellite integration
https://www.youtube.com/watch?v=zqLa9ud6MvI
Post by: seshagirib on 08/01/2015 07:21 am
Post by: input~2 on 08/01/2015 08:12 am
Post by: worldtimedate on 08/04/2015 07:08 am
Quote
ISRO, at present, is gearing up for the launch of GSLV-Mark-II, probably around August 27. "The 2.1-tonne capacity GSLV-Mark-II will be carrying a communication satellite," he said.
Source :
Isro to put US satellite in space for the first time (http://timesofindia.indiatimes.com/india/Isro-to-put-US-satellite-in-space-for-the-first-time/articleshow/48337316.cms)
Post by: Ohsin on 08/11/2015 06:38 pm
Quote from: Google Translator
ISRO employees on strike digana
Hyderabad: ISRO employees out on strike across the country today. 10 per cent of them fit our FAQ ivvadanledani placement, ISRO working ivvadanledanna If anything goes wrong reasons in allowances related to the protest said. It also asks the government for salaries spandincaledani pencamani already said several times. However, this sammevalla jiesel on January 28 and is expected to delay the launch of the Wii.
Quote
సమ్మెకు దిగన ఇస్రో ఉద్యోగులు
హైదరాబాద్ : ఇస్రో ఉద్యోగులు దేశవ్యాప్తంగా ఈరోజు సమ్మె చేపట్టారు. తమకు రావల్సిన 10 శాతం ఫిట్ మెంట్ ఇవ్వడంలేదని, ఇస్రోలో పనిచేస్తున్నప్పుడు ఏదైనా ప్రమాదం జరిగితే దానికి సంబంధించిన అలవెన్సులు కూడా ఇవ్వడంలేదన్న కారణాలతో నిరసన తెలుపుతున్నారు. అంతేగాక జీతాలు పెంచమని ఇప్పటికే పలుమార్లు ప్రభుత్వాన్ని అడిగినప్పటికీ స్పందించలేదని చెప్పారు. అయితే ఈ సమ్మెవల్ల ఈ నెల 28న జీఎస్ఎల్ వీ ప్రయోగం ఆలస్యం అవుతుందని భావిస్తున్నారు.
http://www.prajasakti.com/BreakingNews/1667548
:-[ Is it what I think it is?
Post by: input~2 on 08/13/2015 06:59 pm
Quote
The launch of GSLV-D6 carrying India's latest communication satellite GSAT-6 is scheduled on Thursday, August 27, 2015 from Satish Dhawan Space Centre, Sriharikota.http://maadhyam.isro.gov.in/ (http://maadhyam.isro.gov.in/)
Post by: input~2 on 08/13/2015 07:17 pm
youtube.com/watch?v=e065aH1Zv7Y
Post by: input~2 on 08/13/2015 07:57 pm
http://greattelangaana.com/telugu/news/fire-accedent-at-shar/17600
Post by: Galactic Penguin SST on 08/13/2015 08:06 pm
Unconfirmed fire accident during "mixing fuel in GSLV D6"
youtube.com/watch?v=e065aH1Zv7Y
So there was a fire inside the rocket body?
Post by: Ohsin on 08/13/2015 08:21 pm
Quote
Nellore district, sullurupeta Satish Dhawan Space Centre, located near the sriharikotalo (Shore) occurred in the Thursday afternoon fire. Two injured in this accident. Luckily, however, no loss of life occurred. Shore is located in a building at the Department of solid fuel fires broke out suddenly. The accident occurred while the mixing of fuel with respect to the application jieselvi. Soon, alarmed the crew brought the fire under control. In this case, however, did not have any place in a high-risk, suck the breath. The danger of a Shore employee, a contract employee injured in the information. However, the causes of the accident remains to be seen.
Source (http://www.telugu.webdunia.com/article/andhra-pradesh-news/fire-accident-in-sriharikota-space-centre-115081300052_1.html)
Edit:
Quote
Hyderabad, Aug. 14 -- At least two persons were injured when fire broke out in a part of the Satish Dhawan Space Center at Sriharikota, an island off Nellore district of Andhra Pradesh on Thursday afternoon.
According to the officials, fire broke out at around 2 pm in building No 169 of the fuel department when the highly inflammable fuel was being mixed as part of the preparations for the testing of GSLV rocket.
The accident occurred due to the sparks during the process of the mixing of the fuel. On noticing the sparks a technician Chinna Kondaiah jumped from an elevated platform. He and another contract employee Rajesh were injured in the accident and were first rushed to hospital Sulurpeta and then to Chennai.
http://www.htsyndication.com/htsportal/article/Sriharikota-space-centre-fire-injures-two-fuel-dept-men/7686650
Edit2:
Quote
Fire Accident in ( SDSC SHAR ) Satish Dhawan Space Centre Sriharikota Range Scrap Department when a contract employee while liquid mixing and when he is cleaning Aluminium powder a spark came and then fire accident happened.
https://www.youtube.com/watch?v=3eK12TKCJJs
Post by: K210 on 08/14/2015 07:54 am
Post by: ss1_3 on 08/15/2015 05:47 am
http://www.pressreader.com/india/the-times-of-india-mumbai-edition/20150815/283540859450081/TextView
Post by: isro-watch on 08/15/2015 02:43 pm
The local news channels are freaking out and reporting incorrect information ! The accident has nothing to do with GSLV and happened in SPROB( Solid Propellent Prep facility) within SHAR.
Thankfully, no one was seriously injured
Post by: chota on 08/19/2015 10:01 am
Photo Credits: ISRO
Post by: Ohsin on 08/19/2015 01:28 pm
http://www.isro.gov.in/gslv-d6-gsat-6-gallery
Post by: input~2 on 08/19/2015 02:05 pm
Post by: kanaka on 08/20/2015 12:04 am
Post by: Steven Pietrobon on 08/20/2015 06:34 am
Is cryogenic Engine Fitted??
Yes. All GSLV vehicles have a cryogenic upper stage.
Post by: Ohsin on 08/20/2015 11:43 am
Post by: vyoma on 08/20/2015 03:11 pm
Post by: Ohsin on 08/20/2015 03:43 pm
GSLV-D5 cryo stage had max thrust of 75 kN as per brochure. GSLV D6 cryo stage has max thrust of 73.55 kN as per brochure.
In the table "GSLV-D5 at a glance" it says 75 kN but in text body (Page 5) it says 73.55 kN.
Edit: First and second stage performance is different though.
Post by: isro-watch on 08/21/2015 03:35 am
Post by: antriksh on 08/21/2015 06:59 am
Why do they close down the payload fairing so early ? Doesn't this impact the satellite as it has to be fueled much before launch ?
payload fairing atmosphere is controlled
Post by: vineethgk on 08/21/2015 10:52 am
Is the 4m dia payload fairing confirmed for this flight? Does the payload require it?Answering my own question, apparently 3.4m payload fairing would be used as in previous flight
Post by: chota on 08/22/2015 05:53 am
(http://www.isro.gov.in/sites/default/files/styles/gallery_thumb/public/galleries/GSLV-D6%20/%20GSAT-6%20Gallery/20gslv-d6-second-launch-pad-umbilical-tower.jpg?itok=bYwEs1CJ)
(http://www.isro.gov.in/sites/default/files/styles/gallery_thumb/public/galleries/GSLV-D6%20/%20GSAT-6%20Gallery/21gslv-d6-launch-pad.jpg?itok=5vZuLNmn)
http://www.isro.gov.in/gslv-d6/gslv-d6-gsat-6-gallery
Post by: Ohsin on 08/22/2015 06:35 am
(Attaching higher res images)
Post by: K210 on 08/22/2015 03:10 pm
Post by: K210 on 08/22/2015 04:00 pm
Im surprised nobody has realised that the strapons for this launch have been upgraded. Prior to this mission they used to produce 680kn now they produce 760kn, the second stage has also been increased from 720kn to 800kn.
Those are the figures for D1. They had already been increased for later launches.
No they are the figures for D5 as can be seen in the screenshot below. The D6 specs are attached for comparison.
GSLV D-5
http://i.imgur.com/Ggk8bWz.png
GSLV D-6
http://i.imgur.com/4Hp3Ae8.png
Post by: K210 on 08/22/2015 04:42 pm
Post by: vineethgk on 08/22/2015 06:45 pm
Post by: Stan Black on 08/22/2015 08:20 pm
For some reason GSLV-D5 was the same specification as the GSLV-D1. PSLV-C5 saw an increase of PS2 stage engine to 800, and some have been 799 or 804 kN. Same for most GSLV. GSLV strap-ons too have had increased thrust compared to GSLV-D1.
Post by: kanaka on 08/23/2015 01:10 am
Post by: northenarc on 08/23/2015 01:26 am
Post by: edkyle99 on 08/23/2015 04:50 am
So GSLV is a solid first stage surrounded by four hypergolic boosters, but how are they steering? I've read the Vikas engine can gimbal, do they on GSLV? I noticed a tube running down the boosters and wondered if it might be to shoot extra hydrazine into the stream in a steering scheme similar to PSLV and it's solids. Or maybe it just gimbals and I'm reading too much into it.Steering is provided by gimballing the Vikas engines on the strap-on boosters during the solid motor burn. The core solid motor burns out about 42-ish seconds before the strap-ons shut down, so obviously they steer the launch vehicle during that phase as well.
- Ed Kyle
Post by: vyoma on 08/23/2015 05:37 am
GS1 (first stage):
a) Gimbal on L40 liquid strapon motors
b) SITVC on S125 solid core
GS2 (second stage):
a) Gimbal for pitch & yaw control. Hot gas RCS for roll control.
GS3 (third stage):
a) 2 vernier engines for thrust phase steering; and cold gas RCS for coast phase steering.
However, SITVC on GS1 solid core was removed GSLV D3 (http://www.vssc.gov.in/VSSC_V4/images/brochures/GSLV-D3_GSAT-4%20Brochure.pdf) onwards. So, the current GSLV D6 doesn't have any steering mechanism on S139 solid core in first stage.
Post by: northenarc on 08/23/2015 05:28 pm
Post by: abhishek on 08/24/2015 12:35 am
Post by: seshagirib on 08/24/2015 02:35 pm
Thank you both, interesting that the SITVC was removed during development, I suppose they thought it would be needed for the S125 solid but it was ultimately redundant.
For the GSLV "composite" first stage, the liquid strapons fire for a longer duration then the core solid stage making SITVC redundant for the solid stage.
I suspect the SITVC was built in , just in case the design evolved to a "more normal" configuration, with an enhanced core solid stage firing longer then the strapons.
Post by: vyoma on 08/25/2015 03:30 am
Quote
Aug 24, 2015
GSLV-D6 / GSAT-6 Update: Mission Readiness Review (MRR) committee and Launch Authorisation Board (LAB) have cleared the starting of the 29 hr countdown for the launch of GSLV-D6/GSAT-6 Mission for Wednesday, Aug 26, 2015 at 11:52 hr IST
http://www.isro.gov.in/update/24-aug-2015/gslv-d6-gsat-6-update-mission-readiness-review-mrr-committee-and-launch
Post by: Ohsin on 08/26/2015 06:25 am
http://24framesdigital.com/isro/webcast/270815/video.html
Post by: seshagirib on 08/26/2015 07:04 am
isro.org:
Quote
Aug 26, 2015 : GSLV-D6 / GSAT-6 Update: The 29 hr countdown activity of GSLV-D6/GSAT-6 Mission has commenced today, Wednesday, Aug 26, 2015 at 11:52 hr IST Launch is scheduled at 16:52 hr IST on Aug 27, 2015
Post by: seshagirib on 08/26/2015 07:07 am
29 hrs Countdown should have started. Webcast is streaming with wait screen too.
http://24framesdigital.com/isro/webcast/270815/video.html
^ I am being prompted for a plug in ( firefox browser). Can someone please tell me what plug in is required? ( don't want to be stranded on launch day )
Post by: Steven Pietrobon on 08/26/2015 07:26 am
Post by: Ohsin on 08/26/2015 07:32 am
29 hrs Countdown should have started. Webcast is streaming with wait screen too.
http://24framesdigital.com/isro/webcast/270815/video.html
^ I am being prompted for a plug in ( firefox browser). Can someone please tell me what plug in is required? ( don't want to be stranded on launch day )
You might need windows mediaplayer plugin.
https://support.mozilla.org/en-US/kb/play-windows-media-files-in-firefox
Network stream:
http://24framesdigital.com/isro/webcast/270815/live.asx
Also DD news covers it.
http://webcast.gov.in/live/
If lucky there might be some coverage by Indian news channels on Youtube.
Edit:
DD News on Youtube
https://www.youtube.com/watch?v=6dMYoQIldIo
Post by: Galactic Penguin SST on 08/26/2015 09:10 am
Post by: seshagirib on 08/27/2015 04:22 am
Post by: seshagirib on 08/27/2015 04:28 am
Aug 27, 2015
GSLV-D6 / GSAT-6 Update: Preparations for propellant filling of cryo stage are under progress
Post by: worldtimedate on 08/27/2015 05:31 am
GSLV-D6 set to fly GSAT-6 to space on Thursday (http://www.thehindu.com/news/national/countdown-for-launch-of-gsat6-begins/article7582660.ece)
Quote
ISRO Chairman A.S.Kiran Kumar, who is also Secretary, Department of Space, said the upcoming event was doubly significant. The ninth GSLV launch, for whose success he said ISRO has taken all necessary actions, would take the 20-year-old GSLV programme almost to fruition and regularise its use.
From the satellite point of view, he said GSAT-6 would try out quite a few novel technologies that very few satellite players have tried out, such as the large, unfurlable antenna of a diameter of six metres.
Quote
S.Sivan, Director of Vikram Sarabhai Space Centre, the lead centre for launch vehicles in Thiruvananthapuram, recently said they had retained the configuration of the previous GSLV-D5 of 2014 so as to establish the vehicle’s reliability and robustness.
Flight D6 would fully prove the vehicle and the indigenous cryogenic technology and shift the programme into functional mode.
Post by: vyoma on 08/27/2015 05:41 am
Also "Related News" here.
http://www.isro.gov.in/launcher/gslv-d6
Quote
Aug 26, 2015
GSLV-D6 / GSAT-6 Update: Second Stage (GS2) N2O4 filling under progress
Aug 26, 2015
GSLV-D6 / GSAT-6 Update: Second Stage (GS2) N2O4 filling completed at 14:00hr IST
Aug 26, 2015
GSLV-D6 / GSAT-6 Update: Second Stage (GS2) UH25 filling under progress
Aug 26, 2015
GSLV-D6 / GSAT-6 Update:Second Stage (GS2) UH25 filling completed at 17:46hr IST
Aug 26, 2015
GSLV-D6 / GSAT-6 Update: Propellant filling operation of L40 Strap On Stages is under progress.
Aug 27, 2015
GSLV-D6 / GSAT-6 Update: Propellant filling operation of L40 Strap On Stages is completed by 06:00hr IST. Countdown is progressing normally.
Aug 27, 2015
GSLV-D6 / GSAT-6 Update: Preparations for propellant filling of cryo stage are under progress
Post by: Chris Bergin on 08/27/2015 08:30 am
http://www.nasaspaceflight.com/2015/08/indian-gslv-launch-gsat-6/
Post by: vyoma on 08/27/2015 09:04 am
http://www.isro.gov.in/gslv-d6/gslv-d6-gsat-6-mission-video
Post by: Chris Bergin on 08/27/2015 10:20 am
Propellant filling operations of cryo stage are under progress
Post by: Ohsin on 08/27/2015 10:50 am
https://www.youtube.com/watch?v=VxdsaiqNtGk
Post by: antriksh on 08/27/2015 10:52 am
Post by: Chris Bergin on 08/27/2015 10:54 am
Try DD national Live as DD News is covering something sad :(
https://www.youtube.com/watch?v=VxdsaiqNtGk
Good webcast! And yeah, everyone's news seems to be wall-to-wall sad lately. The world is rather depressing, but it kinda makes you appreciate space flight as that's humans doing good things.
Post by: vyoma on 08/27/2015 10:55 am
https://www.youtube.com/watch?v=VxdsaiqNtGk
ISRO webcast:
http://www.isro.gov.in/gslv-d6/gslv-d6-gsat-6-live-launchpad
Post by: Steven Pietrobon on 08/27/2015 10:55 am
Post by: Steven Pietrobon on 08/27/2015 10:58 am
Post by: Steven Pietrobon on 08/27/2015 10:59 am
Post by: Steven Pietrobon on 08/27/2015 11:01 am
Post by: antriksh on 08/27/2015 11:03 am
Post by: Steven Pietrobon on 08/27/2015 11:04 am
T-19 minutes.
Board is green.
The launch key.
Launch is authorised.
Post by: antriksh on 08/27/2015 11:05 am
Post by: Steven Pietrobon on 08/27/2015 11:07 am
Post by: Steven Pietrobon on 08/27/2015 11:08 am
Post by: Steven Pietrobon on 08/27/2015 11:09 am
Post by: antriksh on 08/27/2015 11:11 am
Post by: antriksh on 08/27/2015 11:11 am
Post by: Steven Pietrobon on 08/27/2015 11:12 am
Post by: Steven Pietrobon on 08/27/2015 11:12 am
Post by: Paul Howard on 08/27/2015 11:12 am
Post by: Steven Pietrobon on 08/27/2015 11:13 am
Post by: antriksh on 08/27/2015 11:14 am
Post by: Steven Pietrobon on 08/27/2015 11:14 am
Post by: Steven Pietrobon on 08/27/2015 11:15 am
Post by: antriksh on 08/27/2015 11:16 am
Post by: vyoma on 08/27/2015 11:16 am
Post by: Steven Pietrobon on 08/27/2015 11:16 am
Post by: antriksh on 08/27/2015 11:16 am
Post by: Chris Bergin on 08/27/2015 11:16 am
Post by: vyoma on 08/27/2015 11:17 am
Why do they move in and out of speaking English, sometimes in the same sentence?
Commentary being provided both in English and Hindi (an Indian language). And, Hindi commentator is mixing in few English words as well :)
Post by: Steven Pietrobon on 08/27/2015 11:17 am
Post by: Chris Bergin on 08/27/2015 11:18 am
Post by: antriksh on 08/27/2015 11:18 am
Post by: Steven Pietrobon on 08/27/2015 11:18 am
Post by: Chris Bergin on 08/27/2015 11:18 am
Post by: antriksh on 08/27/2015 11:19 am
Post by: Steven Pietrobon on 08/27/2015 11:19 am
Post by: antriksh on 08/27/2015 11:20 am
Post by: Chris Bergin on 08/27/2015 11:20 am
Post by: Steven Pietrobon on 08/27/2015 11:20 am
Post by: Chris Bergin on 08/27/2015 11:21 am
Post by: Steven Pietrobon on 08/27/2015 11:21 am
Post by: vyoma on 08/27/2015 11:21 am
Post by: Steven Pietrobon on 08/27/2015 11:22 am
Post by: Chris Bergin on 08/27/2015 11:23 am
Post by: Steven Pietrobon on 08/27/2015 11:23 am
Post by: Chris Bergin on 08/27/2015 11:24 am
Post by: Steven Pietrobon on 08/27/2015 11:24 am
Post by: antriksh on 08/27/2015 11:25 am
Post by: Chris Bergin on 08/27/2015 11:25 am
Staging 1-2.
Post by: Steven Pietrobon on 08/27/2015 11:25 am
T+3 minutes.
Post by: Chris Bergin on 08/27/2015 11:26 am
Post by: antriksh on 08/27/2015 11:26 am
Post by: Chris Bergin on 08/27/2015 11:26 am
Post by: Steven Pietrobon on 08/27/2015 11:26 am
T+4 minutes.
Post by: antriksh on 08/27/2015 11:27 am
Post by: Chris Bergin on 08/27/2015 11:27 am
Post by: Steven Pietrobon on 08/27/2015 11:28 am
Post by: antriksh on 08/27/2015 11:28 am
Post by: Chris Bergin on 08/27/2015 11:28 am
Post by: Steven Pietrobon on 08/27/2015 11:28 am
Post by: Steven Pietrobon on 08/27/2015 11:29 am
Post by: antriksh on 08/27/2015 11:29 am
Post by: antriksh on 08/27/2015 11:30 am
Post by: Steven Pietrobon on 08/27/2015 11:30 am
Post by: Steven Pietrobon on 08/27/2015 11:31 am
Post by: DanseMacabre on 08/27/2015 11:31 am
They seem rather pleased with the third stage - per the applause.
Always a good thing when a country is developing, building and launching domestic launch vehicles! Economical benefits abound! Congrats to India and hoping for many more successful launches and budget science missions!
P.S. I note that f5 is held down - the insurance policy, perhaps ;D
Post by: Semmel on 08/27/2015 11:32 am
Post by: Steven Pietrobon on 08/27/2015 11:32 am
Post by: antriksh on 08/27/2015 11:33 am
Post by: Steven Pietrobon on 08/27/2015 11:33 am
Post by: Chris Bergin on 08/27/2015 11:34 am
Post by: Steven Pietrobon on 08/27/2015 11:34 am
Post by: antriksh on 08/27/2015 11:35 am
Post by: Steven Pietrobon on 08/27/2015 11:35 am
Post by: DanseMacabre on 08/27/2015 11:35 am
Cryo stage burns in augmented mode (11 % of nominal) for the first 4 mins to put a heavier payload in orbit
Is that 11% of nominal thrust, 111% of nominal or 89% of nominal? Augmented seems to imply 111%?
Post by: Steven Pietrobon on 08/27/2015 11:36 am
Post by: Steven Pietrobon on 08/27/2015 11:37 am
Post by: antriksh on 08/27/2015 11:38 am
Post by: Zaran on 08/27/2015 11:38 am
Cryo stage burns in augmented mode (11 % of nominal) for the first 4 mins to put a heavier payload in orbit
Is that 11% of nominal thrust, 111% of nominal or 89% of nominal? Augmented seems to imply 111%?
It's got to be 111%, its only a 75 kN engine after all, running at 7.5 kN would not help putting heavy payloads into orbit.
Post by: Steven Pietrobon on 08/27/2015 11:38 am
Post by: Steven Pietrobon on 08/27/2015 11:39 am
Post by: Chris Bergin on 08/27/2015 11:39 am
Post by: antriksh on 08/27/2015 11:40 am
Post by: Steven Pietrobon on 08/27/2015 11:41 am
Post by: Chris Bergin on 08/27/2015 11:41 am
William's article updated:
http://www.nasaspaceflight.com/2015/08/indian-gslv-launch-gsat-6/
Post by: Steven Pietrobon on 08/27/2015 11:42 am
Post by: Chris Bergin on 08/27/2015 11:43 am
"The naughty boy has been tamed"
Post by: Steven Pietrobon on 08/27/2015 11:44 am
Post by: antriksh on 08/27/2015 11:46 am
Post by: Steven Pietrobon on 08/27/2015 11:47 am
Post by: antriksh on 08/27/2015 11:48 am
Post by: antriksh on 08/27/2015 11:49 am
Post by: Steven Pietrobon on 08/27/2015 11:50 am
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Post by: antriksh on 08/27/2015 11:53 am
Post by: Steven Pietrobon on 08/27/2015 11:57 am
Post by: Steven Pietrobon on 08/27/2015 11:57 am
Post by: Steven Pietrobon on 08/27/2015 11:58 am
Post by: antriksh on 08/27/2015 11:59 am
Post by: Steven Pietrobon on 08/27/2015 12:00 pm
Post by: input~2 on 08/27/2015 12:01 pm
Post by: Steven Pietrobon on 08/27/2015 12:03 pm
Post by: Steven Pietrobon on 08/27/2015 12:04 pm
Post by: Steven Pietrobon on 08/27/2015 12:05 pm
https://www.youtube.com/watch?v=7i_0gBZ7fHs
Post by: vineethgk on 08/27/2015 12:28 pm
Post by: s^3 on 08/27/2015 12:31 pm
planned 170km x 35975km, 19.95 deg
Post by: vineethgk on 08/27/2015 12:52 pm
Post by: baldusi on 08/27/2015 12:56 pm
Post by: abhishek on 08/27/2015 01:00 pm
A BIG Thanks to all for the excellent coverage! 8)
Yes,once again a big thanks to members of NASA SPACEFLIGHT forum for doing a better job than DD.
Post by: Galactic Penguin SST on 08/27/2015 03:58 pm
Post by: input~2 on 08/27/2015 04:38 pm
2015-041A/40880 in 158 x 35769 km x 19.973° (possibly the S/C)
2015-041B/40881 in 165 x 35705 km x 19.974° (possibly GSLV CUS)
Post by: vyoma on 08/27/2015 04:43 pm
Post by: Ohsin on 08/27/2015 05:09 pm
Still better than DD ;D
Post by: northenarc on 08/27/2015 05:45 pm
Post by: Ohsin on 08/27/2015 07:40 pm
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In its oval shaped GTO, the GSAT-6 satellite is now orbiting the Earth with a perigee (nearest point to Earth) of 168 km and an apogee (farthest point to Earth) of 35,939 km with an orbital inclination of 20.01 deg with respect to the equator.
Target was 170km,35975km,19.95 deg
http://pib.nic.in/newsite/PrintRelease.aspx?relid=126398
http://www.isro.gov.in/update/27-aug-2015/gslv-successfully-launches-india%E2%80%99s-latest-communication-satellite-gsat-6
Post by: antriksh on 08/28/2015 03:09 am
Post by: seshagirib on 08/28/2015 05:45 am
Post by: vyoma on 08/28/2015 06:48 am
Why is it called a "unfurlable" antenna? when it is furled up for the launch.
Antenna is stowed during launch, and is unfurled once satellite reaches its intended orbit. Antenna's unfurling mechanism is shown in DECU mission video.
Post by: antriksh on 08/29/2015 01:55 am
— ISRO (@isro) August 29, 2015
Post by: JohnWT on 08/29/2015 04:49 am
Why is it called a "unfurlable" antenna? when it is furled up for the launch.
"unfurlable": capable of unfurling, "infurlable": not capable of being furled.
Post by: seshagirib on 08/29/2015 06:26 am
Why is it called a "unfurlable" antenna? when it is furled up for the launch.
"unfurlable": capable of unfurling, "infurlable": not capable of being furled.
Thanks! got it now.
Post by: Ohsin on 08/29/2015 03:11 pm
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Second orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 2663 seconds at 11:10:53 hr IST on Aug 29, 2015. Realised orbit is 26998 km (perigee height) by 35682 km ( apogee height) with an inclination of 0.115 degree and an orbital period of 20 hr 15 min.
Isro Facebook (https://www.facebook.com/ISRO/posts/1659637717592917)
Post by: Ohsin on 08/30/2015 04:33 am
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Third orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 580.32 seconds at 07:46 hr IST on Aug 30, 2015. Preparation for deployment of the unfurlable antenna (UFA) is in progressIsro Facebook (https://www.facebook.com/ISRO/posts/1659839317572757)
Edit:
Quote
Deployment of the unfurlable antenna (UFA) is in progress.Isro Facebook (https://www.facebook.com/ISRO/posts/1659876624235693)
UFA mid-hold down release successful. Primary arm deployed successfully.
UFA second hold-down release successful and pop-up confirmed.
EDIT:
;D
Deployment of the unfurlable antenna (UFA) is successfully completed! (http://www.isro.gov.in/update/30-aug-2015/gsat-6-update-deployment-of-unfurlable-antenna-ufa-successfully-completed)
Post by: vyoma on 08/30/2015 12:17 pm
Quote
GSAT-6 UPDATE:
Deployment of the unfurlable antenna (UFA) is successfully completed.
http://www.isro.gov.in/update/30-aug-2015/gsat-6-update-deployment-of-unfurlable-antenna-ufa-successfully-completed
Post by: antriksh on 08/30/2015 12:56 pm
1) a deep space mission like Voyager where a huge high gain antenna would be required. UF technology will allow design of such antenna given volume constraints.
2) we can also build our own recon sats similar to NISAR using UFA.
(http://www.dlr.de/hr/en/Portaldata/32/Resources/images/tdml/Tandem-L.jpg)
3) unfurlable heat shield
Post by: Paul Howard on 09/01/2015 09:20 am
QuoteGSAT-6 UPDATE:
Deployment of the unfurlable antenna (UFA) is successfully completed.
http://www.isro.gov.in/update/30-aug-2015/gsat-6-update-deployment-of-unfurlable-antenna-ufa-successfully-completed
Excellent. The largest one to date too!
Post by: Targeteer on 09/01/2015 11:04 am
ISRO - Indian Space Research Organisation
1 hr · Edited ·
GSAT-6 UPDATE :
After the third orbit raising operation of GSAT-6, realised orbit is: perigee height - 35634 km, apogee height - 35681 km, inclination 1.17 degree. Present longitude is 78 deg & satellite is drifting towards station of 83 degree.
Post by: Ohsin on 09/02/2015 12:54 pm
Quote
Two onboard cameras were placed on the launcher - one at the second stage (GS2) looking down towards first stage (GS1) and the second on top of GS2 to look at the nozzle of the cryo stage. The initial segment of the video shows the nozzle portion of the GS2 looking down towards the top dome of the GS1 stage. The vented interstage skirt is also visible. The GS2 stage ignition followed by the GS1 separation (S139 along with four strap-ons) is clearly seen. Three strap-ons separating along with S139 and the interstage separation can also be seen. Afterwards, the screen is blank to switch between the cameras. The later portion of the video shows the magnificent ignition of the indigenous cryogenic stage.http://www.isro.gov.in/gslv-d6/video-onboard-cameras-of-gslv-d6
I think this is first instance of Isro sharing on board footage with us!
Post by: antriksh on 09/02/2015 01:10 pm
http://www.isro.gov.in/sites/default/files/videos/My%20Movie.mp4.mp4
https://www.youtube.com/watch?v=-E0VNQMlFHQ
Post by: Chris Bergin on 09/06/2015 09:45 am
GSAT 6 has been successfully positioned in its orbital slot of 83 Deg E and colocated with INSAT 4A, GSAT 12, GAAT 10 and IRNSS1C today
Post by: chota on 09/16/2015 04:31 pm
Quote
While it normally takes more than 100 days to assemble a GSLV-D6, it took only 33 days of dedicated work at SHAR to integrate the three-stages of the GSLV
http://www.frontline.in/the-nation/cryogenic-success/article7655369.ece?homepage=true
Post by: sanman on 09/19/2015 04:41 am
1st and 2nd stage sepeartion
http://www.isro.gov.in/sites/default/files/videos/My%20Movie.mp4.mp4
So antriksh - the final part of the clip and the last image of your post show a ring-like structure -- is this the PAM-G after being discarded?
https://en.wikipedia.org/wiki/Space_tug#ISRO_PAM-G
I hope we'll be able to see more such onboard camera footage in the future. Goodness knows we've all been clamoring for it.
Post by: vyoma on 09/19/2015 04:52 am
1st and 2nd stage sepeartion
http://www.isro.gov.in/sites/default/files/videos/My%20Movie.mp4.mp4
So antriksh - the final part of the clip and the last image of your post show a ring-like structure -- is this the PAM-G after being discarded?
https://en.wikipedia.org/wiki/Space_tug#ISRO_PAM-G
I hope we'll be able to see more such onboard camera footage in the future. Goodness knows we've all been clamoring for it.
I guess it's interstage structure between 2nd and 3rd stage, which got separated after cryo engine ignition. I don't think ISRO has ever flown PAM-G yet.
Post by: Ohsin on 09/19/2015 06:32 pm
Post by: Steven Pietrobon on 09/20/2015 02:47 am
https://upload.wikimedia.org/wikipedia/en/a/a2/GSLV_Mk2D3_Cryo_Engine.jpg
Post by: sanman on 09/20/2015 01:35 pm
Its possibly some source of external light passing through the grid constructed interstage.
https://upload.wikimedia.org/wikipedia/en/a/a2/GSLV_Mk2D3_Cryo_Engine.jpg
Yes, that was my impression too - it was external light flickering through the spaces in the interstage grid.
Post by: antriksh on 09/20/2015 02:47 pm
1st and 2nd stage sepeartion
http://www.isro.gov.in/sites/default/files/videos/My%20Movie.mp4.mp4
So antriksh - the final part of the clip and the last image of your post show a ring-like structure -- is this the PAM-G after being discarded?
https://en.wikipedia.org/wiki/Space_tug#ISRO_PAM-G
I hope we'll be able to see more such onboard camera footage in the future. Goodness knows we've all been clamoring for it.
Not PAM-G, the last image view is of the third stage moving away from the second stage(camera is on second stage top) after separation. After few seconds, we can see the cryo engine ignition as bright light. ISRO also monitors all the parameters of the cryo through telemetry(pic attached).
I also hope they include on-board video in launch broadcast. They should also open up the telemetry info and provide web API so that we can also view it in real time on some web client.
Post by: antriksh on 09/20/2015 03:13 pm
Any speculation on yellow flashes caught on engine bell at 5 and 12 seconds mark before separation? Also very briefly we get a glimpse of mildly glowing red engine bell @ 49 sec mark. Also at CUS separation that is Moon in background.
At 5 seconds, flash is caused by ignition of the first stage solid booster. At 32 seconds, fire is due to ignition of second stage engine. Second stage ignites few seconds before first stage is off.
EDIT: at 12 seconds its some how due the same reason.
Post by: Ohsin on 09/20/2015 05:56 pm
Any speculation on yellow flashes caught on engine bell at 5 and 12 seconds mark before separation? Also very briefly we get a glimpse of mildly glowing red engine bell @ 49 sec mark. Also at CUS separation that is Moon in background.
At 5 seconds, flash is caused by ignition of the first stage solid booster. At 32 seconds, fire is due to ignition of second stage engine. Second stage ignites few seconds before first stage is off.
EDIT: at 12 seconds its some how due the same reason.
Holy... :o This is why you put the time stamp on videos people! The sneaky cut is at Frame 907 of video @ 30.264 mark..
How I understood the video earlier... :-[
It starts while ~2 min in flight. @5 and @ 13 seconds are flashes that we see on bell and immediately after that we see vented interstage shadows running over bell possibly indicating some rolling or pitching. At 31 seconds GS2 engine ignites pushing separated GS1 away. We see it fall away and oxidizer cloud. Interstage separation. Video cuts to glowing hot engine bell and then cut to second camera and GS2 separation etc...
Thanks :)
Edit: Attached frames 907 and 908 from video. It is very confusing..
Post by: vyoma on 02/08/2016 02:28 pm
(Thanks to Ohsin, /r/isro)