Indian Space Programme Discussion

member_28108 · Post by **member_28108** » 09 Oct 2014 20:44

http://www.business-standard.com/articl ... 662_1.html

Isro's IRNSS-1C launch postponed for a week

The Indian Space Research Organisation (Isro) today said that the Polar Satellite Launch Vehicle (PSLV)-C26, which will carry indian Navigation Satellite (IRNSS)-1C, will be launched on October 16.

It may be noted, the launch was originally planned for October 10, but it was postponed.

The IRNSS-1C is the third of seven series of satellites to put in place India's own navigation system on par with US' Global Positioning System (GPS) from the spaceport of Sriharikota.

Isro's work-horse PSLV-C26 will lift off at 01.32 hours on October 16, from the First Launch Pad (FLP) of Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota, about 100 kms from Chennai. The vehicle will carry 1425 kgs IRNSS-1C, which is the third satellite in the series.

The statellite has already been integrated with the Vehicle and the final phase of check is progressing. The Mission Readiness Review (MRR) Committee and the Launch Authorization Board (LAB) met on October 7, 2014 to review the progress of prelaunch activities and cleared the launch for October 16, 2014, said isro. The 67-hour count down for the mission will commence at 06:32 hours on October 13, 2014.

PSLV-C26 and will use 'XL' version of PSLV and this is the seventh time the XL configuration is being flown, the last one was PSLV-C25 for the Mars Orbiter Mission.

IRNSS, is an independent regional navigation satellite system being developed by India. It is designed to provide accurate position information service to users in India as well as the region extending upto 1500 kms from its boundary, said Isro.

IRNSS-1C is the third navigation satellite, of the seven satellites constituting the IRNSS space segment. Its predecessors, IRNSS-1A and IRNSS-1B were launched by PSLV-C22 and PSLV-C24 in July 2013 and April 2014 respectively. IRNSS-1C has a lift-off mass of 1425.4 kg. The configuration of IRNSS-1C is similar to that of IRNSS-1A and IRNSS-1B.

The satellite has been realised in less than six months after the launch of its predecessor.

IRNSS-1C will carry two types of payloads - navigation payload and ranging payload. The navigation payload of IRNSS-1C will transmit navigation service signals to the users.

This payload will be operating in L5 band (1176.45 MHz) and S band (2492.028 MHz). A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite. The ranging payload of IRNSSS-1C consists of a C-band transponder with facilitates accurate determination of the range of the satellite. IRNSS-1C also carries Corner Cube Retro Reflectors for laser ranging, said Isro.

IRNSS

IRNSS, is an independent regional navigation satellite system behind developed by India. It is designed to provide accurate information service to users in India as well as the region extending upto 1,500 kms from its boundary, which is the primary service area of IRNSS, which will provide two types of services including Standard Positioning Service, which is provided to all the users and Restricted Services. IRNSS comprises of a space and a ground segments.

IRNSS segment consists of seven satellites, including three satellites in geostationary orbit and four satellites in inclined geosynchronous orbit. IRNSS-1A and IRNSS-1B, the first two satellites of the IRNSS constellation, have already started functioning from their designated orbital slot after extensive on orbit test and evaluation to confirm their satisfactory performance.

IRNSS ground segment is responsible for navigation parameter generation and transmission, satellite control, ranging and integrity monitoring as well as time keeping.

The applications of IRNSS include terrestrial, aerial and marine navigation, disaster management, vehicle tracking and fleet management, integration with mobile phones, precise timing, mapping and geodetic data capture, terrestrial navigation aid for hikers and travelers and visual and voice navigation for drivers.

hnair · Post by **hnair** » 09 Oct 2014 21:01

RonyKJ wrote: How did you 'catch' this? Not an easy thing to do because that rocket just takes off like a bullet.
Did you have someone near the launch pad relay the count down to you by phone while you were
ready with your camera ?

Not my work - the photographer's name is in the lower part of photo. But in general, like symontk mentioned, the exact timings are given out in papers. You can setup camera from a tall building and keep the finger ready on the button. The seashore launch site is barely a three or so kilometers away and the launch plume is visible.

And yeah the speed! Because the photographer did not know the timing, by the time he pressed the button, I guess the rocket has nearly reached cloudlayer

merlin · Post by **merlin** » 10 Oct 2014 09:32

hnair wrote: And yeah the speed! Because the photographer did not know the timing, by the time he pressed the button, I guess the rocket has nearly reached cloudlayer

But that is exactly what makes the image.

member_20317 · Post by **member_20317** » 10 Oct 2014 11:28

IRNSS segment consists of seven satellites, including three satellites in geostationary orbit and four satellites in inclined geosynchronous orbit. IRNSS-1A and IRNSS-1B, the first two satellites of the IRNSS constellation, have already started functioning from their designated orbital slot after extensive on orbit test and evaluation to confirm their satisfactory performance.

IRNSS ground segment is responsible for navigation parameter generation and transmission, satellite control, ranging and integrity monitoring as well as time keeping.

The orbit is nearly twice as far compared to GPS and GLONASS.

Comparison of Geostationary Earth Orbit with GPS, GLONASS, Galileo and Compass (medium earth orbit) satellite navigation system orbits with the International Space Station, Hubble Space Telescope and Iridium constellation orbits, and the nominal size of the Earth.[a] The Moon's orbit is around 9 times larger (in radius and length) than geostationary orbit.

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

Rohinis are still being launched!? What do they do with these sounding rockets, today?

Can it be used like a very highly lofted SAM?

arun · Post by **arun** » 10 Oct 2014 12:35

Image of Cyclone Hudhud from ISRO’s INSAT 3D Satellite via Indian Meteorological Department website :

NHC Curve

More Images here:

Cyclone Images

member_28108 · Post by **member_28108** » 10 Oct 2014 15:23

Rohinis are still being launched!? What do they do with these sounding rockets, today?

They are used for what they are designed for - as sounding rockets to study atmospheric conditions.In fact many countries coordinate with TERLS as it is at the magnetic equator.
http://en.wikipedia.org/wiki/Rohini_(rocket_family)

chaanakya · Post by **chaanakya** » 10 Oct 2014 19:01

PSLV C26/IRNSS 1C Status Update:

The launch of the third satellite of the Indian Regional Navigation Satellite System, IRNSS 1C by PSLV C26 from Satish Dhawan Space Centre, Sriharikota is rescheduled to 01:32 AM (IST) on 16th October, 2014.

Based on the mission requirements, the launch window is 01:32 AM to 01:47 AM (IST).

Stay tuned for LIVE UPDATES of this launch on Wednesday night.

member_28108 · Post by **member_28108** » 10 Oct 2014 20:15

Nozzle End Segment of the first stage of PSLV C26 photographed along with the launch pedestal

symontk · Post by **symontk** » 11 Oct 2014 21:36

ravi_g wrote: ..................

Rohinis are still being launched!? What do they do with these sounding rockets, today?

Can it be used like a very highly lofted SAM?

Sounding rockets are not guided, a big difference when compared to launch vehicles or missles. By the way, the newest model of RH560 is almost as big as SLV-3

member_23370 · Post by **member_23370** » 12 Oct 2014 01:05

How come? SLV-3 was almost 22m long. RH560 mk2 is still less than 10 m.

symontk · Post by **symontk** » 12 Oct 2014 13:48

Yes "big" was a wrong word, should have used capable

pankajs · Post by **pankajs** » 12 Oct 2014 19:21

ISRO ‏@isro 2h2 hours ago

LaunchAuthorizationBoard has authorized the launch of PSLV C26/IRNSS 1C & the countdown is all set to commence tomorrow morning@06:32AM(IST)

Roperia · Post by **Roperia** » 13 Oct 2014 08:22

67 hour countdown for IRNSS 1C launch commences at Sriharikota

pankajs · Post by **pankajs** » 13 Oct 2014 10:16

ISRO ‏@isro 4m4 minutes ago

Filling of MonoMethyl Hydrazine (fuel) into the fourth stage of PSLV C26 has just been completed.

Ranjani Brow · Post by **Ranjani Brow** » 13 Oct 2014 16:02

French firm to launch Indian earth observation satellite, move to boost gathering of intel

French space company Arianespace is scheduled to launch an Indian earth observation satellite (EOS) on December 4. It would contain an Electronic Intelligence System (ELINT) package that will boost New Delhi's capability to collect strategic intelligence in the neighbourhood.

While the ELINT satellite launched from French Guiana will act as a force multiplier for India's National Technical Research Organisation (NTRO)

India and France have deepened cooperation in high technology, nuclear, space and intelligence areas. The ELINT satellite project was moved through NTRO in 2011 with both sides freezing technical classifications and parameter in 2013 strategic dialogue.

What/Which satellite is this.

Varoon Shekhar · Post by **Varoon Shekhar** » 13 Oct 2014 19:41

^
Could this be the DRDO developed surveillance satellite, that was mentioned 2-3 years ago? It is now 2 years for sure, so maybe it is ready for launch.

Varoon Shekhar · Post by **Varoon Shekhar** » 13 Oct 2014 19:47

Bheeshma wrote:How come? SLV-3 was almost 22m long. RH560 mk2 is still less than 10 m.

The sounding rockets launched in recent years seem to be all RH-200's. The last RH560 launch was officially in 1995. Does ISRO feel no need for heavier sounding rockets, since the RH-200's meet their requirements for atmospheric research?

member_28108 · Post by **member_28108** » 13 Oct 2014 20:02

RH 560 is for ionospheric studies. I think they may have launched the RH 200 for atmospheric data prior to the IRNSS launch to get some data they needed as it is a meteorologic sounding rocket.

member_28108 · Post by **member_28108** » 13 Oct 2014 22:51

Latest Updates

Oct 13, 2014
All the planned propellant filling operations for today (PS4 & PS1 RCT) have been completed.
Propellant (Oxidiser) (MON-3) filling of Reaction Control Thrusters (RCT) of First Stage (PS1) is completed.
Mixed Oxides of Nitrogen (Oxidiser), (MON-3) Propellant filling operation of Fourth Stage (PS4) of PSLV-C26 is completed.
Propellant (MMH) filling of Reaction Control Thrusters (RCT) of First Stage (PS1) is completed.
Propellant (MMH) filling of Reaction Control Thrusters (RCT) of First Stage (PS1) has commenced.
Mono-Methyl Hydrazine (MMH) Propellant filling operation of Fourth Stage (PS4) of PSLV-C26 is completed.
Mono-Methyl Hydrazine (MMH) Propellant filling operation of Fourth Stage (PS4) of PSLV-C26 has commenced.
The 67 hr countdown of PSLV-C26 / IRNSS-1C Mission commenced at 06:32 hr (IST) today, Oct 13, 2014.

JTull · Post by **JTull** » 14 Oct 2014 01:20

prasannasimha wrote:RH 560 is for ionospheric studies. I think they may have launched the RH 200 for atmospheric data prior to the IRNSS launch to get some data they needed as it is a meteorologic sounding rocket.

It was to do with Hudhud.

member_28108 · Post by **member_28108** » 14 Oct 2014 20:19

Oct 14, 2014
Countdown activity is progressing normally.

pankajs · Post by **pankajs** » 15 Oct 2014 14:38

ISRO @isro · 1h 1 hour ago

Filling of Fuel (Unsymmetrical Dimethyl Hydrazine + Hydrazine Hydrate) into the second stage of PSLV C26 has just been completed.

pankajs · Post by **pankajs** » 15 Oct 2014 16:36

ISRO ‏@isro 2h2 hours ago

PSLV C26/IRNSS 1C Launch: Live on Doordarshan, http://isro.gov.in , http://facebook.com/ISRO and @isro tonight 01:02 AM (IST) onwards.

member_24146 · Post by **member_24146** » 15 Oct 2014 16:44

hecky wrote:French firm to launch Indian earth observation satellite, move to boost gathering of intel

French space company Arianespace is scheduled to launch an Indian earth observation satellite (EOS) on December 4. It would contain an Electronic Intelligence System (ELINT) package that will boost New Delhi's capability to collect strategic intelligence in the neighbourhood.

While the ELINT satellite launched from French Guiana will act as a force multiplier for India's National Technical Research Organisation (NTRO)

India and France have deepened cooperation in high technology, nuclear, space and intelligence areas. The ELINT satellite project was moved through NTRO in 2011 with both sides freezing technical classifications and parameter in 2013 strategic dialogue.
What/Which satellite is this.

I think it's GSAT-16. Read THIS

Varoon Shekhar · Post by **Varoon Shekhar** » 15 Oct 2014 18:58

Nice write up about the pre-launch activities of the GSLV Mark 3

http://economictimes.indiatimes.com/new ... 818505.cms

BANGALORE: Within a few weeks, the Indian Space Research Organisation (Isro) will team up with the Indian Air Force to conduct a simple experiment: it will drop a 3.7-tonne capsule from a height of 3.5 km and try to land it softly with parachutes. If successful, Isro will take this capsule in November-end to a height of 120 km on a rocket and eject it from there, to be recovered from the sea after a soft landing. Success in this e

JTull · Post by **JTull** » 16 Oct 2014 01:09

Satellite IRNSS 1-C placed in orbit.

member_28579 · Post by **member_28579** » 16 Oct 2014 01:09

PSLV C26/IRNSS 1C Launched Seccussfully !!!!....Congrats ISRO...!!!!

member_28108 · Post by **member_28108** » 16 Oct 2014 01:10

Congrats. Wonder why we were getting 1040 error BR was down 2nd time this week

SaiK · Post by **SaiK** » 16 Oct 2014 01:12

^naarmal naarmal backup ops onlee
congrats

https://pbs.twimg.com/media/B0A7mM-CcAARWnH.jpg

member_28108 · Post by **member_28108** » 16 Oct 2014 01:14

Next IRNSS in December

member_28108 · Post by **member_28108** » 16 Oct 2014 01:15

SagarAg · Post by **SagarAg** » 16 Oct 2014 01:15

Naarmal PSLV launch onlee

Great work @isro scientists.

SSSalvi · Post by **SSSalvi** » 16 Oct 2014 01:16

What a buttering is going on in speeches

Just kills the joy of successful launch

member_28108 · Post by **member_28108** » 16 Oct 2014 01:17

IRNSS 1D launch in December.

shravanp · Post by **shravanp** » 16 Oct 2014 01:17

Congrations to ISRO, for yet another naarmal liftoff!

JTull · Post by **JTull** » 16 Oct 2014 01:20

From Chairman's and other speeches
. PSLV C26 integrated in less than 60 days
. 7th XL launch
. 282.56Km perigee against target 284 km
. Similar very low deviations on apogee and inclination
. 4 more navigation satellites planned for this team.
. GSLV Mark-III in end-Nov

member_28108 · Post by **member_28108** » 16 Oct 2014 01:22

All parameters are within expected range.

member_28108 · Post by **member_28108** » 16 Oct 2014 01:22

GSLV Mark III is in next 30-45 days.

Shrinivasan · Post by **Shrinivasan** » 16 Oct 2014 01:22

^^^ congrats ISRO... years of effort, desi sweat and blood is paying off. all the best for next IRNS as well as GSLV launches.

SaiK · Post by **SaiK** » 16 Oct 2014 01:24

SSSalvi wrote:What a buttering is going on in speeches
Just kills the joy of successful launch

who's?

i thaaught it was always we go from naarmalcy to nirmalcy!