Extra Weight Of Heat Shield Dragged Down IRNSS-1H Navigation Satellite

A timeline on ISRO's journey Only 2 failures in 24 years

The launch vehicle PSLV-C39, carrying the 1,425kg satellite, is scheduled for a lift-off at 7pm from the second launch pad at the spaceport of Sriharikota, about 110km from Chennai.

Based on the initial inference, informed sources at ISRO said the command for separation had gone through but failed to trigger the mechanical process that pops open the heat shield. "If the heat shield had separated, we would have got good satellite signals".

The PSLV-C39 rocket, which failed to launch the IRNSS 1H satellite on Thursday, was dragged down by at least one tonne of extra weight from the unseparated heat shield after the second stage, its velocity reduced by one kilometre per second.

The mission readiness review (MRR) committee and launch authorisation board (LAB) had on 29 August cleared the countdown.

Another satellite may be launched to make up for the loss of IRNSS-1H, said Indian Express. The rocket performed perfectly through three stages but was unable to complete the fourth, heat shield separation.


IRNSS-1H, the eighth in the NavIC constellation, was to replace IRNSS-1A, the first satellite in the constellation.

Finally, the tip of the rocket with the satellite inside should have reached the orbit. "For example, it should have attained a velocity of 9.5km per second at the end of it but attained only 8.5km per second", said Former ISRO Satellite Centre director SK Shivakumar.

ISRO has planned a ninth navigation satellite for the IRNSS system.

It is the first in-flight failure of India's workhorse launcher since 29th September 1997, when the IRS D Earth observation satellite failed to reach its intended orbit, though the correct orbit was subsequently achieved. The system is similar to the Global Positioning System of the USA, the Russian GLONASS, the European Galileo and the Chinese BeiDou.

Related news:

Hot News

isis-killer-beheading-video-story-top PS1-Inspired Crystal Dualshock 4 Controllers Coming to PS4 This October
Sep 03, 2017 - 06:37
They'll be exclusive, respectively, to GameStop/EB Games , Walmart and Best Buy in the USA and Canada. Here are the pre-order links for the Crystal, Blue Crystal, and Red Crystal controllers for the US.

isis-killer-beheading-video-story-top Cuba attacks caused mild brain injury
Sep 03, 2017 - 06:32
A Canadian government official said it first learned in March that one of its citizens was affected. Secretary of State Rex Tillerson later confirmed that hearing damage was among the effects.

isis-killer-beheading-video-story-top Sharapova sizzles past Kenin, into US Open second week
Sep 03, 2017 - 06:24
Image: Twitter handle of US Open Tennis. "If you put me out in a parking lot of Queens in New York City, I'm happy to play there". Sharapova's will take on Latvia's Anastasija Sevastova Sunday for a spot in the quarter finals.

isis-killer-beheading-video-story-top President Trump Looks To Withdraw From Trade Deal With South Korea
Sep 03, 2017 - 06:23
So if Trump signed a letter to withdraw from the agreement, the deal would effectively be terminated in March 2018. While the more recent threat may be a negotiating tactic, it is far more realistic than the threat to leave NAFTA .

isis-killer-beheading-video-story-top Pats deal Brissett to Colts for WR Dorsett
Sep 03, 2017 - 06:18
Dorsett fills a necessary need for the Patriots after Julian Edelman went down for the season with a torn ACL . If you thought the New England Patriots were done wheeling-and-dealing this offseason, well, think again.

isis-killer-beheading-video-story-top Watch 'Game of Thrones' Stars Emilia Clarke, Kit Harrington on Finale Twist
Sep 03, 2017 - 06:03
As for Harington, he confessed that between takes while filming their ~tryst~ he would make gagging noises. Hinting on season eight, Harrington said, "It could be them walking off into the sunset".

isis-killer-beheading-video-story-top Trump cuts to Obamacare's ads threaten law's fragile markets
Sep 03, 2017 - 06:01
For example, if a navigator program met 70 percent of its enrollment target, it will get 70 percent of its previous funding. States that run their own marketplaces are not included in the navigation program.

isis-killer-beheading-video-story-top Kenya Presidential election overturned amid claims results were hacked
Sep 03, 2017 - 05:49
He was however adamant that the current electoral commission should not be allowed to hold any other election in Kenya. The court did not place blame on Mr Kenyatta or his party.

isis-killer-beheading-video-story-top Body of missing Temple student found
Sep 03, 2017 - 05:45
Joshua Hupperterz, a 29 year old former Temple student, has been arrested and is being charged with the murder of Jenna Burleigh. Hours before the press conference, Burleigh's father, Ed Burleigh, announced the discovery of his daughter's body on Facebook .

isis-killer-beheading-video-story-top JJ Watt's Hurricane Harvey Fundraiser Eclipses $10 Million Goal
Sep 03, 2017 - 05:42
Rather, the 28-year-old Watt , a Wisconsin native who was drafted No. 11 by the Texans in 2011, is by all accounts a hell of a person.

isis-killer-beheading-video-story-top The Crow Reboot Lands at Sony, Might Actually Happen
Sep 03, 2017 - 05:42
A real bullet had become dislodged inside a gun full of blanks and when it was shot, the action resulted in his tragic death. It was to have been directed by Corin Hardy (whose next film is the upcoming Conjuring spin-off The Nun ).

isis-killer-beheading-video-story-top Boston Red Sox activate Jackie Bradley from DL
Sep 03, 2017 - 05:42
The Red Sox continued their poor play against the Yankees with runners in scoring position, hitting just 0-for-15 in this series. Benintendi's 14 RBIs this season are the most against the Yankees by any rookie since Jose Canseco also drove in 14 in 1986.

isis-killer-beheading-video-story-top Cowboys game with Texans canceled; players say this is bigger than football
Sep 03, 2017 - 05:41
Rapoport says fans who purchased tickets can either get a refund or allow the money to be donated toward storm-relief efforts. Watt surpassed $17 million on Saturday, according the crowdfunding site that is taking the donations.

isis-killer-beheading-video-story-top Rahm grabs lead at halfway mark at TPC Boston
Sep 03, 2017 - 05:41
He won at Torrey Pines in January. "So I was very happy to see that I hit a lot of good shots, a lot of good putts", Garcia said. After taking a drop he chipped to 15 feet but could not get up and down, leaving him to walk away with a double-bogey five.

isis-killer-beheading-video-story-top British 'blockbuster' bomb forces 70000 people from Frankfurt homes
Sep 03, 2017 - 05:38
The location of the bomb , known as a HC 4000, is guarded, and there "is now no danger", authorities revealed. It will be one of the biggest operations of its kind carried out in Germany since the war.