Indian Space Programme Discussion

SaiK · Post by **SaiK** » 18 Jan 2016 19:08

Fifth navigation satellite set for launch on January 20

http://www.thehindu.com/news/cities/ban ... ece?w=city

The year’s first domestic space mission will take off on Wednesday morning

The year’s first domestic space mission will take off on the morning of Wednesday, January 20, at Sriharikota with the fifth regional navigation spacecraft, the IRNSS-1E.

At the Satish Dhawan Space Centre, the launch team began a 48-hour countdown for the flight of the satellite launch vehicle, PSLV-C31, at 9.31 a.m. on Monday. The flight was cleared by two high-level review committees on Sunday, according to the Indian Space Research Organisation.

IRNSS-1E is a 1,425-kg spacecraft carrying navigation and ranging payloads. It is similar to the earlier four navigation satellites IRNSS-1A to 1D which were put in orbit between July 2013 and March 2015.

Two more navigation spacecraft – IRNSS-1F and 1G – are due to follow in February and March, an ISRO official said. They will then complete the seven-satellite constellation, otherwise called the ‘Indian GPS’.

The full fleet is likely to be switched on for regular use by end-2016 after it is tested and tried for a few months.

Already, the first four navigation spacecraft have been giving 18-hour positional information with good accuracy of the Indian region; the duration will improve with new satellites, the official said.

After a series of orbit corrections post-launch, IRNSS-1E will be placed in a geosynchronous orbit over 111.75 degrees east longitude. It will go around Earth at a distance of 20,000 km and inclined at 28.1 degrees.

For the current mission, ISRO is using the XL (extended) version in the first stage of the four-stage PSLV rocket. This format is being used for the 11th time.

Keywords: IRNSS

Indian GPS switching, I think there should be enough time provided for products and services companies from mobile navigation devices to location-based services.

Why wait till the 11th hour to say 'yet to be developed'?

member_28108 · Post by **member_28108** » 18 Jan 2016 23:42

PSLV C31/IRNSS 1E Update: Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 is completed by 18:15 hr IST.

member_28108 · Post by **member_28108** » 19 Jan 2016 20:50

PSLV C31/IRNSS 1E Update: N2O4 tank filling of Second Stage (PS2) is under progress

Varoon Shekhar · Post by **Varoon Shekhar** » 20 Jan 2016 08:19

http://www.isro.gov.in/pslv-c31-irnss-1 ... aunch-live

Live telecast has started, launch in a few minutes

Karthik S · Post by **Karthik S** » 20 Jan 2016 08:30

Launch successful.

rahulm · Post by **rahulm** » 20 Jan 2016 08:50

Satellite injected. C31 mission successful.

Most powerful variant of PSLV XL thus far.

symontk · Post by **symontk** » 20 Jan 2016 08:51

Nice to see that any PSLV launch is now kept as a boring affair

Congrats ISRO

Varoon Shekhar · Post by **Varoon Shekhar** » 20 Jan 2016 08:54

rahulm wrote:Satellite injected. C31 mission successful.

Most powerful variant of PSLV XL thus far.

Do you mean the most powerful variant of PSLV, or of PSLV-XL? If the latter, what was done to make it more powerful than the other XL's? Thanks.

disha · Post by **disha** » 20 Jan 2016 10:32

VS'ji., it is not different. Just the figure of speech creates that impression. It is PSLV-XL like any other PSLV-XL version. See further details at:

http://www.isro.gov.in/sites/default/fi ... ochure.pdf

nTripathi · Post by **nTripathi** » 20 Jan 2016 11:44

rahulm wrote:Satellite injected. C31 mission successful.

Most powerful variant of PSLV XL thus far.

well almost all irnss satellites are 1425 kg and also irnss-1d was launched into the same longitude... hence i dont see anyhting that suggests that this is most powerful version of 'pslv xl'!! please clarify...

manjgu · Post by **manjgu** » 20 Jan 2016 12:51

what are the military applications of IRNSS satellits?

rahulm · Post by **rahulm** » 20 Jan 2016 13:14

It's typed directly as I heard it during the ISRO post launch speeches. I have no other sources to substantiate the statement.[I am too busy battling Pune Polis for my mothers Police Clearance Certificate to research it

]

The 11/11/11 tri-fecta was also mentioned. 11 core alone launches, 11 XL launches and 11 'naaarmal' config launches.

Gyan · Post by **Gyan** » 20 Jan 2016 13:19

Another routine boring successful launch by ISRO

Nick_S · Post by **Nick_S** » 20 Jan 2016 14:03

More pics here -
https://twitter.com/isro/status/689738593615515648

Vid
https://twitter.com/PIB_India/status/689699168554582016

member_29268 · Post by **member_29268** » 20 Jan 2016 14:11

PS 4 propellant loading for C31 is 2.5 t as compared to 1.6 t of C30.
Edit: Which would mean a longer burn duration of PS 4 stage and hence more dV imparted to satellite before separation.

Singha · Post by **Singha** » 20 Jan 2016 14:26

Zzzzzzzzz (muted sounds of snoring)

SaiK · Post by **SaiK** » 20 Jan 2016 16:33

Mullahs.. wake up from these snoring only from the 7th gets on orbit.

Mil application is tremendous accuracy and precision for any scan & tracking using Deshi GPS. Why, even IFF can be done for any moving objects w.o. GAGAN.

Humara device or you are firang

SSridhar · Post by **SSridhar** » 21 Jan 2016 16:14

ISRO Update

IRNSS 1E Update: The apogee raise maneuver of IRNSS-1E has been successfully carried out for 1197 sec (~20 min) from 09:41 hrs IST on Jan 21, 2016. This LAM firing is expected to change apogee X perigee height to 35882kmX320 km

rsingh · Post by **rsingh** » 21 Jan 2016 20:16

** Deleted **

Aditya_M · Post by **Aditya_M** » 21 Jan 2016 20:45

* Deleted *
What's the point of this?

rsingh · Post by **rsingh** » 21 Jan 2016 21:08

Lurk more and you will get the point. salam

member_29267 · Post by **member_29267** » 23 Jan 2016 02:55

manjgu wrote:what are the military applications of IRNSS satellits?

Guidance!! For missiles, aircraft and what not. ISRO was working with some application developers in Bangalore o bring this to the civilian area. The devices(mobiles etc) will need a some small piece of new hardware to start making use of the IRNSS navigation. I'm more than certain all our new and upcoming missiles like Nirbhay will be fully capable of operating with IRNSS navigation.

The purpose is obviously redundancy over foreign navigation systems like GPS (US), GLONASS (Russia) and GALILEO (EU). Other space faring nations like Japan (Quasi Zenith IIRC) and China (Beidou) are also doing the same.

akashganga · Post by **akashganga** » 23 Jan 2016 05:42

Chinese have not forgotten their loss to india in the race for mars:

http://www.scmp.com/news/china/society/ ... -be-chance

member_29172 · Post by **member_29172** » 23 Jan 2016 06:06

It's too late now I suppose. Either way, there's a serious need to think about a mars base in the coming decades. It's only inevitable for our civilization to spread to other somewhat habitable planets. ISRO's sole focus on just launching satellites is getting annoying now. The R in ISRO stands for research and its about time they research human space flight and bases that can support a community of 100-150 people on Moon and eventually Mars.

ISRO neither had plans for space stations nor bases. Another golden opportunity that's being swindled.

SaiK · Post by **SaiK** » 23 Jan 2016 07:42

robotic missions is what ISRO must focus on mars, and I would focus on H3 from moon.

member_29294 · Post by **member_29294** » 23 Jan 2016 08:48

PSLV can't support all these ambitious missions.

Worry about getting the GSLV Mk.2/3 certified first by launching satellites. Only then, will it be feasible to start doing these missions.

Venus hot-air balloon mission has never been done and talked about before by ISRO, it would be a really amazing mission that would inspire a whole new generation. I believe that should be the main mission after Chandrayaan-2. Mars has been done by America several times, and China would have had a mission there already.

Neshant · Post by **Neshant** » 23 Jan 2016 09:31

It should go to Titan.

Or is it Europa?

Which is the moon with water flowing up between the cracks?

SSridhar · Post by **SSridhar** » 23 Jan 2016 14:20

IRNSS 1E Update: The perigee raise maneuver has been successfully carried out for 1515.36 sec (~25.5 min) from 01:29 hrs IST on Jan 22,2016.

IRNSS 1E Update: The perigee raise maneuver has been successfully carried out for 1515.36 sec (~25.5 min) from 01:29 hrs IST on Jan 22,2016.
Orbit Determination results from this LAM firing are: apogee X perigee height was changed to 35819 kmX 7330 km. Inclination changed from 19.2 to 24.07 deg. Orbital period is 12hr 55min 11sec.

member_29089 · Post by **member_29089** » 23 Jan 2016 14:32

SaiK wrote:robotic missions is what ISRO must focus on mars, and I would focus on H3 from moon.

Request to Mods:
Same advice as below should given to SaiK for writing incomprehensible posts all over the forums over the last decade.

"Take it to the BENIS thread if you want. No need to pollute a serious discussion with such posts."

member_28108 · Post by **member_28108** » 23 Jan 2016 17:54

IRNSS 1E Update: The third orbit raising operation has been successfully carried out.

SwamyG · Post by **SwamyG** » 23 Jan 2016 19:25

member_29267 · Post by **member_29267** » 24 Jan 2016 04:16

Chakra.in wrote:PSLV can't support all these ambitious missions.

Worry about getting the GSLV Mk.2/3 certified first by launching satellites. Only then, will it be feasible to start doing these missions.

Venus hot-air balloon mission has never been done and talked about before by ISRO, it would be a really amazing mission that would inspire a whole new generation. I believe that should be the main mission after Chandrayaan-2. Mars has been done by America several times, and China would have had a mission there already.

The Venus Orbiter Mission (Shukrayaan shall we say

) that is proposed if very similar to the Mangalyaan in terms of the instruments and the orbiter itself. It is to been seen if the hot air balloon part will be implemented, as such, it was just a proposal from a French scientist IIRC. Venus mission doesn't have any fund allocation as of yet.

And you are correct in that Chandrayaan-2 will be ISRO's next flagship deep space mission. This is for next year ie 2017. After that, it will be the Aditya. These are the funded Deep Space missions as of yet. If the Venus mission is funded, and if it is same as MOM, we can assume that ISRO can launch it about 1 year from when it gets funding (MOM was 1.5 years from announcement to launch). ISRO also wants to do a follow up mission to Mars. This, if it includes, a lander (and a rover) might take significant funding and also effort.

So we are looking at something like below:
2017 - Chandrayaan- 2
2018 - Aditya
2019 - Shukrayaan
2020/2022 - Mangalyaan -2

Note that Mangalyaan-2 and the follow up of Chandraayaan-2, say Chandrayaan-3, which might include a bigger rover or a be a sample return mission, will need LVM3. Actually, a sample return from moon will be something even bigger ie the HLV.

Neshant wrote:It should go to Titan.

Or is it Europa?

Which is the moon with water flowing up between the cracks?

It is Enceladus, moon of Saturn. Also Europa, moon of Jupiter. These moons are thought to have subsurface liquid water oceans. Exploration beyond the Asteroid belt will be a very huge step and is not going to happen anytime soon from ISRO. India neither has the technology nor the finances to pursue such missions. Maybe we will be in such a position by say 2030.

member_29172 · Post by **member_29172** » 24 Jan 2016 04:43

Chakra.in wrote:PSLV can't support all these ambitious missions.

Worry about getting the GSLV Mk.2/3 certified first by launching satellites. Only then, will it be feasible to start doing these missions.

Venus hot-air balloon mission has never been done and talked about before by ISRO, it would be a really amazing mission that would inspire a whole new generation. I believe that should be the main mission after Chandrayaan-2. Mars has been done by America several times, and China would have had a mission there already.

The GSLV Mk.3 has already been validated a few times. These are not african vodoo doctors that throw a tin can in space and hope it flies. All the subsystems, the engines have been tested and tested again for decades now. Most organistations in India, especially military and space research org. needs to take some risks if it wants to be big and innovate new technology. Just a few months ago, some redneck american senator passed a bill to mine asteroids and planets, which means, soon enough these bases and mining locations would be property of unkil, which means these places will be guarded with weapons, which means slowly but surely the weaponisation of space has begun (unless the US military kept sending secret weapons up in space after the cancellation of other ambitious space programs in the '70s, in which the space is already weaponised)

As of now, ISRO's performance is becoming underwhelming. I've also heard some eggspurts both here and in ISRO gleefully teaching us unwashed masses that human spaceflight and space expansion is just waste of money and not something we should do.

It's such a beggar like attitude, we have the tech, we have the know how, with some willingness to take risk we can potentially land robots and humans into another planets, but we won't because? it's a waste of money apparently.
Almost every major technology that exists today was a waste of money once, that's how new tech is developed, that's how you stay ahead of the curve.

As for saik's comments, I don't know how strong your astronomy is, but mars is the closest habitable planet to Earth. What's better? sending humans to a desert like but somewhat livable planet or an ice covered ocean with very cold temperatures in some remote corner of jupiter? I suppose you were trying to sound clever and it was supposed to be some sophisticated form of sarcasm lol.

We need to expand, theres no way we are going to survive in this little land of non violence and piss while pakis and kangladeshis keep hording on our lands.

member_29172 · Post by **member_29172** » 24 Jan 2016 05:03

Neshant wrote:It should go to Titan.

Or is it Europa?

Which is the moon with water flowing up between the cracks?

Exploratory missions? yes, but manned ones should go to Mars and Moon. Moon would be the gas station or rest stop before jumping on for deeper missions.

That moon is Europa: https://en.wikipedia.org/wiki/Europa_(moon)

apparently, another one of Jupiter's moon Ganymede has been found with salty oceans: http://www.space.com/28807-jupiter-moon ... ocean.html

The entire Jupiter moon system seems quite promising. There are plenty of asteroids as well that have been found to contain water.

ISRO is trying to get the transportation costs to lower (wink wink nudge nudge to those who know about these projects). That should atleast make transportation of resources easier, but it'll only take you so far. Plus the media and general "elite" society is so retarded and opposite brained in India, that perhaps ISRO would be left sending satellites till 2050s while everyone else moves on to something bigger and better. It's good to be practical, but it's not 1950s anymore, punch above your weight a little for once.

sanjaykumar · Post by **sanjaykumar** » 24 Jan 2016 07:33

(wink wink nudge nudge to those who know about these projects)

member_28108 · Post by **member_28108** » 24 Jan 2016 17:55

IRNSS 1E Update: The third orbit raising operation has been successfully carried out by firing the LAM engine for 1507 sec (~25 min) from 03:19 hrs IST on Jan 23, 2016.
The Orbit Determination results from this LAM firing are:
apogee X perigee height was changed to 35827km X 24618 km. Inclination changed to 27.35 deg. Orbital period is 19hr 21min 27sec.

member_28108 · Post by **member_28108** » 24 Jan 2016 20:07

ISROVerified account ‏@isro 2h2 hours ago
IRNSS 1E Update: The fourth and final orbit raising operation has been successfully carried out.

member_28108 · Post by **member_28108** » 24 Jan 2016 20:11

IRNSS 1E Update:
The fourth and final orbit raising operation has been successfully carried out for 447 sec (~7.45 min) from 22:49 hrs IST on Jan 23, 2016.
The Orbit Determination results from this LAM engine firing are:
apogee X perigee height was changed to 35827km X 35353 km, Inclination changed to 28.07 deg. Orbital period is 23hr 46min

member_28108 · Post by **member_28108** » 24 Jan 2016 20:17

^ Regarding the GSLV Mk 3 - where has it been validated in its entirety. It has undergone ground testing.The CE20 was not fired in the CARE module test. Also this was done to study the atmospheric phase and based on those results they need to do modifications and corrections based on the data they got.
No amount of simulations can replace actual flight testing.

sum · Post by **sum** » 25 Jan 2016 12:17

** Deleted **