irnss indian regional navigation satellite system aleksander jurica
TRANSCRIPT
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IRNSSIndian
Regional Navigation Satellite System
Aleksander Jurica
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Introduction
Regional Navigation system Developed by Indian Space
Research Organization (ISRO) Independence from US GPS GPS is not guaranteed in hostile
situations The program was approved in May
2006
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Introduction
IRNSS will cover Indian subcontinent, South-east Asia, Iran, Indian Ocean, China, some parts of Australia, and Arab subcontinent.
IRNSS is expected to be realized by 2014-15 according to ISRO.
The first of seven satellites (IRNSS-1) is scheduled to be launched in June 2013
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Introduction
IRNSS will provide an absolute position accuracy of better than 10 meters throughout India and within a region.
The IRNSS system mainly consists of: Ground Segment, Space Segment and User Segment.
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Services
Service type Signals Frequency Band
Standard Positioning Service 1.023 Mcps L5(1191.795Mhz)
S(2491.005Mhz)
Precise Positioning 10.23 Mcps L5
Service S
Restricted Services for 10.23 Mcps L5
Special Users
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IRNSS Space Segment
Seven satellites - three in GEO orbit (at 34º E, 83º E and 131.5º E , 36000 km altitude)
four in GSO (Geosynchronous orbit) ( 35,786 km) orbit inclined at 29 degrees to the equatorial plane with their longitude crossings at 55º E and 111.5º E (two in each plane)
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PowerPlugs: Templates
Highest Quality Greatest Quantity Largest Variety Consistent Professionalism Visually Appealing
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IRNSS Space Segment
All the satellites will be continuously visible in the Indian region for 24 hours a day.
The life span of the GEOs is 9.5 years and 11 years in the case of the GSOs.
The Indian GSLV-Mk III launcher will be used for launching.
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The proposed satellite specifications are:
Dry mass of the satellite ~ 600 kg Power generation 1400 watts Fuel loading capacity ~ 785 kg Accommodates navigation payload
of weight 102 kg and 375 watts of power
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IRNSS Ground Segment
Responsible for the maintenance and operation of the IRNSS constellation.
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IRNSS Ground Segment IRNSS Space Craft Control Centre
(SCC) IRNSS Navigation Centre (INC) IRNSS TTC & Up linking Stations
(IRTTC) IRNSS Range and Integrity
Monitoring Stations (IRIMS) IRNSS Timing Centre (IRNWT) IRNSS CDMA Ranging Stations
(IRCDR) Laser Ranging Station (ILRS) Data Communication Network
(IRDCN)
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IRNSS User segment
Made of the IRNSS receivers. Dual-frequency receivers or single
frequency with capability to receive ionospheric correction.
The user receiver will have a minimum gain G/T of -27 dB/K.
They will be able to receive and process navigation data from other GNSS constellations
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PowerPlugs: Templates
Highest Quality Greatest Quantity Largest Variety Consistent Professionalism Visually Appealing
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IRNSS Signal Plan
Made of the IRNSS receivers. Dual-frequency receivers or single
frequency with capability to receive ionospheric correction.
The user receiver will have a minimum gain G/T of -27 dB/K.
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Thank you for your attention