TAG: IRNSS

The System: Celebrating 20 Years of GPS

March 31, 2015By
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April marks the 20th anniversary of GPS FOC. U.S. Air Force Space Command declared Full Operational Capability (FOC) for the GPS constellation April 27, 1995, signifying the system met all requirements with 24 operational Block II/IIA satellites in their assigned orbital slots and providing both the military Precise Positioning Service (PPS) performance standard and the civil Standard Positioning Service (SPS)... read more

Spectracom Adds India’s IRNSS, Japan’s QZSS to Simulator Capabilities

March 31, 2015By
Spectracom’s GSG-6 Series multi-frequency GNSS signal simulator.

Spectracom has added capability to simulate India’s global navigation satellite system, IRNSS, and Japan’s regional satellite system, QZSS, to its GSG-6 Series multi-frequency GNSS signal simulator. The simulator is designed to be field upgradeable to simulate all current and future GNSS constellations so current customers can benefit from these features without the need for a factory return in most cases. “Spectracom understands... read more

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India’s IRNSS-1D Launched into Orbit

March 30, 2015By
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The fourth satellite of IRNSS satellite navigation constellation, IRNSS-1D, was launched onboard PSLV-C27 on Saturday, March 28, according to the Indian Space Research Organization (ISRO). The Polar Satellite Launch Vehicle blasted off at 11:49 GMT (7:49 a.m. EST), or 5:19 p.m. local time, at the Satish Dhawan Space Center on India’s east coast. This is the fourth successful launch of a navigation satellite... read more

Launch of IRNSS-1D Now Set for Saturday

March 23, 2015By
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The launch of India’s fourth Navigation Satellite, IRNSS-1D, is now scheduled for 17:19 IST (11:49 UTC) on Saturday, March 28, from Satish Dhawan Space Centre, Sriharikota. The launch was previously scheduled for March 9, then postponed until March 29 to replace a faulty telemetry transmitter on the satellite, according to the Indian Space Research Organization. IRNSS-1D will be fourth in the seven-spacecraft Indian Regional... read more

IRNSS-1D Launch Rescheduled for March 29

March 11, 2015By

The launch of the fourth satellite for the Indian Regional Navigation Satellite System, previously scheduled for 9 March, has been postponed until March 29 at 13:00 UTC. The delay is due to the replacement of a faulty telemetry transmitter on the satellite. read more

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Launch of IRNSS-1D Postponed

March 4, 2015By

The launch of India’s fourth navigation satellite, IRNSS-1D, originally scheduled for March 9, has been postponed. During the integrated electrical checks on March 3 of the launch vehicle and satellite following closure of the heat shield, an anomaly was observed in one of the telemetry transmitters of the satellite, according to a post on the Indian Space Research Organization (ISRO)’s Facebook page.... read more

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ISRO to Launch Fourth Navigation Satellite March 9

March 2, 2015By

The Indian Space Research Organization (ISRO) is expected to launch IRNSS-1D on March 9, reports The Times of India. IRNSS-1D is the fourth navigation satellite in the Indian Regional Navigational Satellite System, and will make the constellation operable. The launch is tentatively planned for March 9 around 6:35 p.m. However, final go for the launch will be given by the ISRO’s Launch Authorization Board,... read more

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The System: Fregat Design Ambiguity Steered Galileo Wrong

November 1, 2014By

Cross-Installed Hydrazine, Helium Lines Froze Thrusters The root cause of the anomaly that sent two Galileo satellites into the wrong orbit on August 22 was a shortcoming in the system thermal analysis performed during stage design, and not an operator error during stage assembly, according to findings by an independent inquiry board. The independent inquiry board was created by Arianespace,... read more

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