Indian Space Program: News & Discussion - Sept 2016

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Haridas » 18 Aug 2019 10:30

juvva wrote:
Varoon Shekhar wrote:Just to clear up for lay people like myself :) - there is no perigee and apogee with Chandrayaan-2 at this time, right? It is headed straight for the moon. Then there is the 'lunar capture', which leads to a new set of perigees and apogees around the moon, until it sets in at a more or less 100km orbit indefinitely.

CY-2 is still in elliptical orbit around the earth, this orbit will get it close to the approaching moon around 20th August and enable lunar capture.

you are decomposing earth and moon as seperation gravity system as if they have only second order effect on each other. But that assumption (resulting in elliptical orbit) is only reasonable for earth orbit whose apogee is very significantly smaller (say about 60,000km) than distance to Lagrange point for earth-moon system .

http://hyperphysics.phy-astr.gsu.edu/hb ... lagpt.html
Image

The current orbital path of CY2 is due to a system comprising CY2 and two celestial bodies and the resulting trajectory very different from being elliptical. So conventional notion of apogee need to be understood with much qualification.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby prasannasimha » 18 Aug 2019 19:39

sivab wrote:SCE-200 is a staged combustion engine.

Yes indeed I was referring to a full(LOX LH2 staged combustion engine that requires full engine firing. . In a semicryo you can hot test certain portions for eg till preburner.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Indranil » 19 Aug 2019 02:39

GSLV Mk3 with SC120 will be 2.5 mtrs taller than GSLV Mk3 with L110 core. It is also very likely that the SC120 will be ground lit.Interesting times ahead!

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby ldev » 19 Aug 2019 02:50

Indranil wrote:GSLV Mk3 with SC120 will be 2.89 mtrs shorter 2.5 mtrs taller than GSLV Mk3 with L110 core. It is also very likely that the SC120 will be ground lit.Interesting times ahead!


Any idea as to the burn time for the SC120. Because it has to burn for some time after the S200 boosters separate. If so, that will definitely result in a higher delta v than the present stage set up. And is the difference between the SC120 vs SC200 just the amount of fuel i.e. 120 tons vs 200 tons? Because that is how historically ISRO has named it's stages.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby krishGo » 19 Aug 2019 03:27

ldev wrote:
Indranil wrote:GSLV Mk3 with SC120 will be 2.89 mtrs shorter than GSLV Mk3 with L110 core. It is also very likely that the SC120 will be ground lit.Interesting times ahead!


Any idea as to the burn time for the SC120. Because it has to burn for some time after the S200 boosters separate. If so, that will definitely result in a higher delta v than the present stage set up. And is the difference between the SC120 vs SC200 just the amount of fuel i.e. 120 tons vs 200 tons? Because that is how historically ISRO has named it's stages.


If I take the publicly available specification of SCE-200, with 120 tons of propellant, the equation (burn time = propellant mass / mass flow rate) gives me a burn time of around 200 seconds (closer to 200 for the air lit version and lesser for an ground lit version). That is to say, the burn time should be around the same as the current L110. It might mean the stage won't be earth-lit. Maybe it is a conscious choice by ISRO and sees this as upgrade that wont change the mission profile of the launcher.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Indranil » 19 Aug 2019 03:55

I have corrected my quote. GSLV Mk3 with SC120 stage will be taller, not shorter. The difference between SC120 and SC200 must only be in propellant mass.

While SCE 200 will most certainly be ground lit, SCE 120 may be airlit. It is riskier to air light an RP-1 based rocket engine of this size. The burn time is not a concern. Even unthrottled, the SCE120 should have a burn time of around 210 seconds.

My back of the envelop calculation show a GTO capability of around 4.6 tons.

The L110 and L40 stages are not cheap. In fact, the 4 strapons were the most expensive part of the GSLV Mk2. I expect GSLV Mk2 to be retired as soon as the SC120 stage comes on board. SC120+2*S85+C32 would be a more capable launcher than GSLV Mk2*. As I have said before, ULV and RLV are more dear to me than most ISRO projects. I would love to see the following fly:
1. SC120 + 6*PSOM + C32
2. SC120 + 2*S85 + C32
3. SC120 + 2*S139 + C32
4. SC120 + 2*S200 + C32
5. SC200 + 2*S200 + C32
6. SC200 + 2*SC120 + C32
7. SC200 + 2*S250 + C32
8. SC500 + C32

Rest all is moh-maya :wink:

*S85 is a disproportionally large-sized first stage for SSLV. It is abnormally slender as well (at 21 mtrs long). On the other hand, it is perfectly shaped and sized to serve as a booster for the GSLV Mk3 core.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby ldev » 19 Aug 2019 05:06

krishGo wrote:If I take the publicly available specification of SCE-200, with 120 tons of propellant, the equation (burn time = propellant mass / mass flow rate) gives me a burn time of around 200 seconds (closer to 200 for the air lit version and lesser for an ground lit version). That is to say, the burn time should be around the same as the current L110. It might mean the stage won't be earth-lit. Maybe it is a conscious choice by ISRO and sees this as upgrade that wont change the mission profile of the launcher.


Thanks, that's what I thought. The higher isp for the RP1/LOX will however result in a higher payload to GTO, probably 5 tons.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby A Nandy » 20 Aug 2019 10:34

Lo behold! The Yaan has undergone LOI:

https://www.isro.gov.in/update/20-aug-2 ... -insertion

Lunar Orbit Insertion (LOI) maneuver was completed successfully today (August 20, 2019) at 0902 hrs IST as planned, using the onboard propulsion system. The duration of maneuver was 1738 seconds. With this, Chandrayaan-2 was successfully inserted into a Lunar orbit. The orbit achieved is 114 km x 18072 km.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby juvva » 20 Aug 2019 10:51

114 km x 18072 km -achieved
vs
118 km x 18078 km -planned

WOW !!!!!

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby sajaym » 21 Aug 2019 10:28

I have a query about creating a moon base quickly. Will it be possible to have 2-3 spacecraft inserted simultaneously into the moon's atmosphere in such a way that after re-entry they can dock with each other and then descend together onto the moon's surface? This way when they land, they will be a ready-made moon base.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Vips » 21 Aug 2019 22:56

India and France to sign an agreement soon to launch 10 Surveillance satellite's to keep track of "movements in the Indo-Pacific".

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Indranil » 21 Aug 2019 23:34

sajaym wrote:I have a query about creating a moon base quickly. Will it be possible to have 2-3 spacecraft inserted simultaneously into the moon's atmosphere in such a way that after re-entry they can dock with each other and then descend together onto the moon's surface? This way when they land, they will be a ready-made moon base.

Moon's atmosphere? Re-entry?

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby dhyana » 22 Aug 2019 07:10

Per Vips post....

PM Modi visit to France: Launch of satellites for maritime surveillance in Indo-Pacific key agenda

Both countries have planned the launch of 8-10 satellites as part of a “constellation” for maritime surveillance in the region. This will be India’s largest space cooperation with any country so far, sources said. They said the satellites will focus on the Indian Ocean, a region that has been witnessing increasing Chinese presence. The purpose of the constellation is monitoring sea traffic management, sources said, adding that it would take less than five years to launch the satellites.


Also (earlier), this... French And Indian Space Agencies To Establish Maritime Surveillance Centre In India

The CNES-ISRO agreement, intended to supply an operational system for detecting, identifying and tracking ships in the Indian Ocean, provides for a maritime surveillance centre to be set up in India in May this year, sharing of capacity to process existing satellite data and joint development of associated algorithms.

For the next phase of the programme, studies for an orbital infrastructure to be operated jointly by the two countries are ongoing. CNES is working with its industry partners and with ISRO to devise the most appropriate technical solution.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby A Nandy » 23 Aug 2019 19:33


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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Vips » 24 Aug 2019 00:16

Will space suits for Gaganyaan astronauts come from Russia?

As the Indian Space Research Organisation (Isro) continues its preparations for Gaganyaan, the proposed human spaceflight mission, there are indications that the space suits astronauts as part of the mission will wear, among other things, may come from Russia.

A statement issued from Moscow, Russian space agency Roscosmos, read: "...Russia and India are expecting to negotiate the contracts to supply windows, crew seats and spacesuits for the Indian crewed mission."

Stating that the two countries are expected to reach an agreement by the end of August, the statement read: "The sides also discussed possible
Indian crewed flight carrier rocket aerodynamic tests, as well as piloted vehicle and crew rescue system."

Roscosmos Director General Dmitry Rogozin also held a working meeting with India's National Security Advisor Ajit Doval in Moscow.

Among other things, they discussed space co-operation perspectives "in the sphere of piloted spaceflights, as well as satellite navigation and engine technology.

As has been reported by TOI already, Isro, on July 1, signed the agreement to get its astronauts for the proposed Gaganyaan mission trained in Russia, even as other countries including the US and France were being considered initially.

Natalia Lokteva, first deputy director general, Glavkosmos—a subsidiary of Roscosmos—and S Unnikrishnan Nair, director, Human Space Flight Centre (HSFC) of Isro, signed a contract for “selection support, medical examination and space training of Indian astronauts.”

An official statement issued by Glavkosmos confirming the contract, read: “Glavkosmos will render to HSFC services on consulting support of selection of candidates for the Indian astronauts, providing medical examination of the candidates for access to space flight related training program and providing space flight related training for the Indian astronauts selected on the basis of the medical examination.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Indranil » 24 Aug 2019 00:26

Tenders for SC120 (from IPRC) continue to flow. This jingo is very happy!

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Varoon Shekhar » 24 Aug 2019 02:48

I remember reading that a spacesuit was already made several years ago. Maybe they want more, or to try a different kind?

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby prasannasimha » 24 Aug 2019 17:09

Indranil wrote:Tenders for SC120 (from IPRC) continue to flow. This jingo is very happy!

If you see the budgetary allocation of semicryo engine there are two budgetary allocations of interest = one is the semicryo itself and the other is for clustering of semicryo engine.
Other interesting allocations are for space docking experiment , Atmos satellite and Venus exploration mission

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby prasannasimha » 24 Aug 2019 17:10

Varoon Shekhar wrote:I remember reading that a spacesuit was already made several years ago. Maybe they want more, or to try a different kind?

Technically it is a flight suit and not a space suit for EVCA.
More than that Russian collaboration is required for various training procedures etc.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Vips » 25 Aug 2019 17:49

It was this -

Cheaper and lighter: 'Made in Gujarat' spacesuits to be used in Gaganyaan.

The countdown to India’s ambitious manned spaceflight mission Gaganyaan has begun and Isro scientists are at breakneck speeds to achieve the mission’s December 2021 deadline.

India’s indigenously developed astronaut crew escape suit, bearing the ‘Made in Vadodara’ tag is the first on Isro’s wardrobe. The suit is 20% lighter and one hundredth of the cost of its foreign counterpart. The astronaut crew escape suit will see the best of both American and Russian space suits. The last time an Indian wore a space suit was in 1984, when wing commander Rakesh Sharma flew aboard Russian Soyuz T11.

Sure Safety, a Vadodara based industrial safety equipment manufacturer has designed the suit from scratch after collaborating with Isro’s Space Applications Centre Ahmedabad.

The firm gave the first glimpse of the space suit at the Futuristic Technology Exhibition inaugurated on Thursday at the Science City. Nishith Dand, managing director of the firm, told TOI that trials for testing the material under lab conditions are almost over, including vacuum chambers tests. “Right from the communications, bio-sensors measuring body temperatures, oxygen and carbonmonoxide levels and to pressure management systems, all technology has been developed indigenously ,” he said.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby prasannasimha » 25 Aug 2019 19:57

Vips wrote:It was this -

Cheaper and lighter: 'Made in Gujarat' spacesuits to be used in Gaganyaan.

The countdown to India’s ambitious manned spaceflight mission Gaganyaan has begun and Isro scientists are at breakneck speeds to achieve the mission’s December 2021 deadline.

India’s indigenously developed astronaut crew escape suit, bearing the ‘Made in Vadodara’ tag is the first on Isro’s wardrobe. The suit is 20% lighter and one hundredth of the cost of its foreign counterpart. The astronaut crew escape suit will see the best of both American and Russian space suits. The last time an Indian wore a space suit was in 1984, when wing commander Rakesh Sharma flew aboard Russian Soyuz T11.

Sure Safety, a Vadodara based industrial safety equipment manufacturer has designed the suit from scratch after collaborating with Isro’s Space Applications Centre Ahmedabad.

The firm gave the first glimpse of the space suit at the Futuristic Technology Exhibition inaugurated on Thursday at the Science City. Nishith Dand, managing director of the firm, told TOI that trials for testing the material under lab conditions are almost over, including vacuum chambers tests. “Right from the communications, bio-sensors measuring body temperatures, oxygen and carbonmonoxide levels and to pressure management systems, all technology has been developed indigenously ,” he said.

Again a misnomer if you read it through - it is I repeat aspace flight suit and even Dr Somnath clarified the same in one of his interviews. It is for in capsule wearing and not for EVA so remains a flight suit.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Vips » 27 Aug 2019 03:10

Indranil wrote:
abhik wrote:SSLV test launch moved to after September (did not realise it was so close to being ready).
https://timesofindia.indiatimes.com/ind ... 368911.cms

Was supposed to be in July-August.


It is now 'likely' in December.

Besides the focus on Chandrayaan-2 moonlanding scheduled for September 7, Isro has accelerated the work on the Small Satellite Launch Vehicle (SSLV) or mini-PSLV project, whose first demonstration flight test is likely in December. The mini-PSLV, which can be assembled in 3-5 days and is a vehicle on demand, will be a money spinner for the space agency.

Before the SSLV launch, the agency will launch its advanced cartography satellite, Cartosat-3, towards the “end of October or early November”, Isro chief K Sivan said. The Cartosat-3 is an advanced series of surveillance satellites with a powerful panchromatic camera and resolution of less than 1 metre, which will be used for strategic operations by security forces. Cartosat-3 launch will be the fourth launch from Sriharikota this year.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Amber G. » 27 Aug 2019 06:10

juvva wrote:
Varoon Shekhar wrote:Just to clear up for lay people like myself :) - there is no perigee and apogee with Chandrayaan-2 at this time, right? It is headed straight for the moon. Then there is the 'lunar capture', which leads to a new set of perigees and apogees around the moon, until it sets in at a more or less 100km orbit indefinitely.

CY-2 is still in elliptical orbit around the earth, this orbit will get it close to the approaching moon around 20th August and enable lunar capture.


Few comments. For lay people as well as serious ones (with good background in physics/math).

- Juvva is basically correct but let me add and amplify:

1. Like everything in physics, NO orbit is *exactly* elliptical but it is a *very* good approximation and sufficient to *understand* basics. Just like we say earth is a sphere but closer we get (or more details) there are mountains and other irregularities. This does not matter if we are looking from space but can matter a lot if we are climbing the mountain.

2. For most planets, (or moon or sats around earth) we can simplify by not considering complications and treat it as a two body problem. Thus we can say moon goes around an elliptical orbit (nearly circular orbit) around earth. But there are perturbations due to effect of Sun, (and even Jupiter and Venus which are quite noticeable.

3. If we look from earth, the orbit of CY2 looks like figure 1 (figure constructed from actual data). Each part of the "orbit" is ellipse (or nearly an ellipse). After each rocket firing, there is different ellipse.
4. When CY2 reaches moon - before LOI, - ignoring moon - the path is such that perigee is where TLI was rocket was fired and apogee is pretty close to moon.
5. After moon's "disturbance"+ LOI rocket - the orbit changes to near circular orbit virtually identical to moon.
(Or course all those ellipses have little "ripples/perturbations/variation" from true ellipse)
Figure 1:
Image

Hope this helps.

If you are looking from the Moon.
.
(See figure 2 - Sorry, the data for last 3 rocket firings are not available for this picture.. so posting a picture but *not* zooming in for the "orbits" around moon.. so they look like a point only) (You have to imagine that at the end point CY2 is going into elliptical orbit around the moon).

- CY2 looks like a sat orbiting earth (closely at first and then "escaping" and reaching towards moon.
- It is approaching the moon in nearly hyperbolic orbit.
- Near perigee (closest approach to moon) LOI starts.
- The nearly hyperbolic orbit becomes elliptical orbit with very large e.
- After a few more rocket firings - the orbit becomes more circular ending in a circular orbit. (about 100 Km)
- Vikram separates and assumes a elliptical orbit (perigee 30 km or so)
- Vikram soft lands etc..

Figure 2.
Image

*** Added later: (Created a new diagram)
Added later: I zoomed on the CY2 orbit from Moon's perspective. (I am using a plane where north pole of the moon is pointing upwards.)

From this point of view - CY2 is approaching from right -( almost a straight line, but it is a part of ellipse in X-Y plane -- I am showing Y-Z plane). After the first burn, the orbit now is ellipse, it changes inclination.. almost polar wrt to moon now.. and the orbit is less elliptical after the second burn.

Image
-
****
If you are looking from Sun:
Nothing much happens - small ripples - everything within few hundred thousand Km over the elliptical orbit of earth (about 150 million Km).
Last edited by Amber G. on 27 Aug 2019 10:11, edited 1 time in total.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Vips » 28 Aug 2019 07:06

Russia to select & train 4 of 12 Indian astronauts for Gaganyaan mission.

Russia will select and train four Indian astronauts out of the 12 India will send to the country for an intense training in order to prepare them for India’s maiden human spaceflight programme or Gaganyaan mission, scheduled for launch by early 2022, the deadline fixed by PM Narendra Modi during his I-Day speech last year. Under the Rs 10,000 crore manned space mission, India will send at least three Indians to space for 5-7 days, where they will conduct various micro-gravity tests.

Indian Space Research Organisation (Isro) chairman K Sivan told TOI that "India will send 12 astronauts to Russia. Of them, Russia will select and
train four for the advanced training".

During a recent meeting between Russian space agency Roscosmos director general Dmitry Rogozin and national security adviser Ajit Doval in Moscow, the two sides had discussed on selection and training of four Indian astronauts at the Yuri Gagarin Cosmonaut Training Center in Star City of Moscow Oblast to prepare them for the space mission, a Roscosmos statement said. After the Russian training, the four astronauts will be prepared for the mission back in India in the remaining months before the launch by December 2021 or early 2022.

The two countries also discussed Indian-crewed flight carrier rocket aerodynamic tests, piloted vehicle and crew rescue system. The two sides are also likely to negotiate the contracts for supply of crew seats, windows and spacesuits If India’s Gaganyaan mission is successful, it will become the fourth country in the world after Russia, the US and China to be capable of sending astronauts to space.

Russia is helping India’s manned mission in three aspects. “The first area of cooperation is in selection and training of space crew. Though it’s first for us, they are very experienced in this vital part of the manned space mission,” India’s ambassador to Russia D B Venkatesh Varma told TOI. Russia is also helping India with the simulation of the mission and selection of a module for it. “Lots of simulation are must before the actual mission. The selection of a suitable module is also critical for this mission. They are helping us with both,” he said.

On June 27, Roscosmos subsidiary Glavkosmos and Indian Space Research Organisation had signed a contract for the selection and training of Indian astronauts.

More discussions between India and Russia on Gaganyaan and other areas of space cooperation are likely to take place when a PM Narendra Modi-led top-level delegation will go to Russia’s Vladivostok for the Eastern Economic Forum meeting from September 4 to 6.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby jaysimha » 29 Aug 2019 15:13

aeromag Asia.
Isro Golden jubilee edition
https://www.aeromag.in/Magazines/8400886799.pdf
Image

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby kit » 29 Aug 2019 23:53

*deleted

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby abhik » 30 Aug 2019 08:51

RSTV: In Depth - Semi Cryogenic Tech for Gaganyaan

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby jaysimha » 30 Aug 2019 13:02


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Re: Indian Space Program: News & Discussion - Sept 2016

Postby jaysimha » 05 Sep 2019 15:23

general information
12th International High Energy Materials Conference & Exhibit
December 16-18, 2019 - IITM, Chennai
http://web.iitm.ac.in/hemce2019/

https://web.iitm.ac.in/hemce2019/wp-con ... ow-Res.pdf


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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Indranil » 05 Sep 2019 20:08

Great write up Sriram!

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Varoon Shekhar » 06 Sep 2019 17:25

X-posting after the faux-pas :)

SSSalvi wrote:October launches pushed to Nov.
About 4 Pslv and 3 Gslv till December


Awesome. Particularly eager to see GSLV Mark 2 with GISAT by year end. I'll hold you to it :D

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby abhijitm » 08 Sep 2019 20:39

That Pallava Bagla dude from NDTV got so much publicity people started digging his kundali. One found that he has put 3800 ISRO images on sale including scientists, equipments on Getty Images for $499 each!!! Social media is buzzing. I hope ISRO has given him written persmission, otherwise this is a serious security breach.

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Re: Indian Space Program: News & Discussion - Sept 2016

Postby dinesha » 08 Sep 2019 20:57

Tender out for SSLV launch Complex (SLC)

From the tender document:
SSLV Launch Complex (SLC) project is being realized by Satish Dhawan Space Centre SHAR (SDSC SHAR). SLC consists of various facilities for integration and launch Small Satellite Launch Vehicle (SSLV). The first stage of SSLV is integrated over a Mobile Launch Pedestal (MLP) at First Stage Assembly Facility (FAF) and then the partially assembled vehicle on MLP is carried over by a bogie to SSLV Assembly Facility (SAF). At SAF, upper stages are assembled and the fully assembled SSLV is carried over to the Launch Pad (LP) for launch. A rail track connects the FAF, SAF and LP. The bogie moves on a rail track system of MRS 85 / CR 171 rails over concrete foundation. Maximum weight of the payload to be hauled is about 400 t (MLP + Launch vehicle + bogie).

To meet this requirement, a sturdy track capable of taking bogie wheel loads is to be laid between FAF and LP. The track is a rail track with the gauge of 6.5 m. The area between the rail tracks will be paved (concrete / flexible pavement) and used for movement of the hauler for MLP traction.


Mobile Launch Pedestals, Rail Track and Bogie
https://www.isro.gov.in/sites/default/f ... -11483.pdf

The Bogie system will lift the MLP using four hydraulic jacks on each corner. The Bogie will be having 4 sets of wheels on each corner and each set is having 2 numbers of steel wheels of 1.2m diameter. Bogie moves on 6.5-meter gauge with 8 nos of double flange wheels rail track along with integrated vehicle, which is pulled/pushed by SPU, moving on the road from vehicle assembly building to launch pad which is 1400m away from Assembly building.

Self-Propelled Unit (SPU) is connected to bogie by tow bar system. Bogie is fitted with tow hitch at front face at one side and is connected to Self-Propelled Unit using Tow bar. The entire Bogie + MLP + Launch Vehicle, weighing 500t, is being Pulled or Pushed, using proposed SPU.

MLP will be transported from Launch Pad to Service Building and service building to First stage assembly building by using SPU as a payload. Throughout the transportation activities, SPU moves on the concrete paved road.


Self Propelled Unit
https://www.isro.gov.in/sites/default/f ... _12041.pdf

Description of Self-Propelled Units
SPU shall be hydrostatic drive i.e. variable displacement hydraulic pumps will supply the hydraulic fluid to hydraulic motors, which are fitted directly to wheels. The variable displacement pumps will be powered by a water cooled diesel engine of suitable capacity. Drive system shall be provided with suitable electronic control system for regulating the speed, acceleration/deceleration, braking, steering, lifting/lowering etc.
The proposed SPU – 2 nos shall be capable to work in two different modes
-Push / Pull Mode (PPM
-Lift & Transport Mode (LTM)
For push/pull mode, each SPU shall be capable to Push / Pull 500t payload to launch

pad on rail track and for lift & transport mode, moduled/combined SPU shall be capable to Lift & Transport MLP, weighting 228t, on the road from launch pad to service building and service building to first stage assembly facility (FAF).


S.S Tank
https://www.isro.gov.in/sites/default/f ... -11486.pdf
Last edited by dinesha on 08 Sep 2019 21:28, edited 2 times in total.

Kakarat
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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Kakarat » 08 Sep 2019 21:10

It seems they are building a new launch complex including a separate launch pad for SSLV

NRao
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Re: Indian Space Program: News & Discussion - Sept 2016

Postby NRao » 10 Sep 2019 00:42

Nasa praises India’s moon mission, offers joint solar system Exploration

..............

Space is hard. We commend ISRO’s attempt to land their Chandrayaan2 mission on the Moon’s South Pole. You have inspired us with your journey and look forward to future opportunities to explore our solar system together.

...............


I am unable to cut-rate, but, the article talks of NASA payload that may be able to help.

Amber G.
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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Amber G. » 10 Sep 2019 01:11

NRao wrote:Nasa praises India’s moon mission, offers joint solar system Exploration

..............

Space is hard. We commend ISRO’s attempt to land their Chandrayaan2 mission on the Moon’s South Pole. You have inspired us with your journey and look forward to future opportunities to explore our solar system together.

...............


I am unable to cut-rate, but, the article talks of NASA payload that may be able to help.

NRao - One thing I have mentioned in this dhaga - multiple times - are laser reflectors by NASA on Vikram. These are passive mirror type things, if they landed on the surface, intact and were deployed (it is all automatic) - orientation does *not* matter (as long as they are in line of sight) - one can "see" them and make VERY precise measurements - Can locate/see Vikram's position within a cm even from earth.

Neela
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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Neela » 10 Sep 2019 16:43

For those of you interestested. PLanetary.org this week has a Space policy edition podcast (and several other near Space and deep space / mission podcasts ) .
NASA collaboration/ joint exploration with ISRO seems to be in agreement with what was discussed in the podcast this week.
Summary of this week:

Space collaboration is becoming standard US policy
US China collaboration unlikely.
Mars mission cannot be seen in isolation with moon mission.
<Other updates on Antares / Falcon updates and Congressional thinking on funding>



If you have a long commute to work , download Google podcast and subscribe to the Planetary.org from there.
PS: I didnt realize I was working with a engineer who developed a sensor for Bepi-Columbo mission to Mercury until after I started listening to the podcasts.

ArjunPandit
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Re: Indian Space Program: News & Discussion - Sept 2016

Postby ArjunPandit » 10 Sep 2019 17:59

Out of craziness, i was looking for astrosat data (with a weird thought if it could be used to communicate with CY2). Came across that astrosat has completed 3 years (i knew) and has the released the data for public (didnt know)
https://www.isro.gov.in/update/26-sep-2 ... t-released

Although the link doest open for me as I am in office..but will try later in the day..(not that i can do much with it). But its a great thing for kids to get excited.
On that note, I find ISRO site very poor. They must have some good images that we can use from MY, CY Orbiter and other means to release to public.

Vips
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Re: Indian Space Program: News & Discussion - Sept 2016

Postby Vips » 10 Sep 2019 18:19

Kakarat wrote:It seems they are building a new launch complex including a separate launch pad for SSLV

IIRC, they were were going to build a separate pad for the Manned space mission and for the other heavy launches (with Semi-cryo engines).


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