IRNSS-1I – PSLV-C41 – Шрихарикота – 12.04.2018, 01:34 UTC

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https://www.isro.gov.in/update/10-apr-2018/32-hr-countdown-activity-has-commenced-2004hr-ist-tuesday-april-10-2018-launch-of

Apr 10, 2018

The 32 hr countdown activity has commenced at 20:04hr IST on Tuesday, April 10, 2018 for the launch of PSLV-C41/IRNSS-1I Mission scheduled at 04:04 hr IST on April 12, 2018

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Репитер трансляции ИОКИ (space googlevesaire)

youtube.com/watch?v=FpjoU226xnc

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Chris B - NSF‏ @NASASpaceflight 7 мин. назад

ARTICLE: India's PSLV rocket set to loft the IRNSS-1I -

https://www.nasaspaceflight.com/2018/04/indias-pslv-rocket-irnss-1i/ ...

- By William Graham

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Трансляция на канале PTI News

youtube.com/watch?v=-ku-PVhskyo

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https://spaceflightnow.com/2018/04/11/pslv-c41-mission-status-center/

Live coverage: India's PSLV counting down to satellite launch
April 11, 2018 | Stephen Clark

04/11/2018 21:25 Stephen Clark

India's Polar Satellite Launch Vehicle is set for liftoff at 2234 GMT (6:34 p.m. EDT) with the country's ninth navigation satellite, bolstering a regional positioning and timing network after the loss of a navigation craft on a previous PSLV mission last year.

Today's mission, codenamed PSLV-C41, will boost a nearly 1.6-ton (1.4-metric ton) satellite into orbit for the Indian Regional Navigation Satellite System.

Спойлер

The Indian-built spacecraft poised for blastoff today is named IRNSS 1I. It will be ninth member of India's regional navigation network, including one satellite that was lost on a PSLV launch failure in August 2017.

Unlike U.S., Russian, European and Chinese navigation fleets designed for global reach, India's navigation satellite constellation is intended to provide positioning services over the country's domestic territory and neighboring nations.

Built for a 10-year mission, IRNSS 1I will replenish the Indian navigation system. India initially ordered and launched seven spacecraft for the navigation system, but built more to keep the network running after some of the early satellites encountered trouble with their atomic clocks.

The 145-foot-tall (44-meter) PSLV will place the IRNSS 1I satellite into an elliptical "sub-synchronous" transfer orbit with a low point of 176 miles (284 kilometers), a high point of 12,831 miles (20,650 kilometers) and an inclination of 19.2 degrees, according to flight data published by the Indian Space Research Organization.

The PSLV will deploy the payload around 19 minutes after liftoff. The satellite's on-board engine will fire several times to raise its orbit to an altitude of more than 22,000 miles (nearly 36,000 kilometers), tilted at an angle of 29 degrees to the equator, where IRNSS 1I will enter service in the next couple of months.

ISRO decided to go ahead with today's launch despite a failure afflicting the GSAT 6A communications satellite launched by the larger GSLV Mk.2 rocket March 29. Ground controllers lost contact with the satellite two days after launch, and have been unable to reestablish communications with the spacecraft.

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Трансляция ИОКИ (ISRO)

https://www.isro.gov.in/pslv-c41-irnss-1i/launch-of-pslv-c41-irnss-1i-mission

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04/12/2018 00:44 Stephen Clark

T-minus 50 minutes. There are no problems reported in the countdown, and launch remains on track for 0359 GMT (11:59 p.m. EDT).

Some statistics on today's flight:

43rd PSLV mission
20th launch in PSLV XL configuration
3rd Indian launch of 2018
2nd PSLV flight of 2018
9th launch for IRNSS program
32nd PSLV launch from Sriharikota's First Launch Pad

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04/12/2018 01:21 Stephen Clark

T-minus 14 minutes. The automatic countdown sequence has started.

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Spaceflight Now‏ @SpaceflightNow 6 мин. назад

All weather and technical parameters are reported "go" for launch of India's Polar Satellite Launch Vehicle at 2234 GMT (6:34pm EDT) with a new Indian navigation satellite.

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04/12/2018 01:32 Stephen Clark

T-minus 3 minutes. On-board computers on the PSLV are reported in flight mode.

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Пуск!

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Отд 1-й ст РН

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Сброс ГО

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Отд 2-й ст РН