IRNSS-1I

IRNSS-1I
IRNSS series one spacecraft
Mission type Navigation
Operator ISRO
COSPAR ID 2018-035A[1]
SATCAT no. 43286[2]
Mission duration 10 years
Spacecraft properties
Manufacturer ISRO Satellite Centre
Space Applications Centre
Launch mass 1,425 kilograms (3,142 lb)
Dry mass 600 kilograms (1,300 lb)
Start of mission
Launch date 11 April 2018, 22:34 UTC[3]
Rocket PSLV-XL C41 [4]
Launch site Satish Dhawan SLP
Contractor ISRO
Orbital parameters
Reference system Geocentric
Regime Geosynchronous
Longitude 55° E
Inclination 29°
Period 1450.9 minutes[5]

IRNSS-1I is the eighth satellite in the Indian Regional Navigational Satellite System (IRNSS) series of satellites,In actual IRNSS - 1I is the ninth satellite that launched in IRNSS constellation but it is counting as eighth satellite because IRNSS - 1I is an eighth satellite that has launched successfully in IRNSS constellation.[6]ISRO already launched IRNSS-1A, IRNSS-1B, IRNSS-1C, IRNSS-1D, IRNSS-1E, IRNSS-1F, IRNSS-1G and IRNSS-1H. The satellite is intended to replace the failed IRNSS-1A, and complete the constellation of geosynchronous navigation satellites after IRNSS-1H failed to do so. The satellite's assembly, integration and testing is partly done by a consortium of six small firms led by Alpha Design Technologies, a Bengaluru-based aerospace firm under ISAC's supervision.[7]

Payload

Like its predecessor, IRNSS-1I has two types of payloads, navigation payload and the ranging payload. The navigation payload transmits navigation service signals to the users. This payload is operating in L5 band and S band. A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite.[8] Failure of these Rubidium atomic clocks was the reason for IRNSS-1A to be deemed unfit. The ranging payload consists of transponder which is operated in CDMA mode for two-way range measurements. The IRNSS satellites continuously emites time stamped navigation signals, which are received by the ground-based user receivers. The information is then processed by the receivers to derive their own position, velocity and time. The system provides the seamless 24 by 7 services under all weather condition.

Satellite

The satellite will help in completing the satellite based navigation system of India which is currently under development. The IRNSS space segment consists of seven satellites. After the failure of all three Rubidium Atomic clocks on-board IRNSS-1A and the failure of IRNSS-1H to separate from the heat shield of the launch vehicle, IRNSS constellation remains incomplete without this satellite.
This independent regional navigation satellite system is developed by India and is similar to Global Positioning System (GPS) of the US, which has 31 satellites currently in orbit.

Launch

It was launched by forty-third flight of PSLV (PSLV-C41) in XL configuration on 11 April 2018.

See also

References

  1. ↑ "IRNSS 1I Satellite details". n2yo. Retrieved 14 April 2018.
  2. ↑ "IRNSS 1I". karhukoti. Retrieved 19 April 2018.
  3. ↑ "Launch date". Spaceflight101. 27 March 2018.
  4. ↑ "Official page". Economic Times. 11 March 2018.
  5. ↑ "IRNSS 1I". karhukoti. Retrieved 19 April 2018.
  6. ↑ "ISRO Successfully Launched IRNSS - 1I Navigation Satellite By PSLV - C41". EDUCATIONALTECHS , edited by -Vikash Kushwaha. Retrieved 17 April 2018.
  7. ↑ "Industry partnership with Alpha Design Technologies". The Hindu. 14 August 2017.
  8. ↑ "ISAC's website for IRNSS". ISAC. 31 August 2017.
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