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Mahesh

29/04/22 05:52 AM IST

GAGAN based LPV approach Procedure

In News 
  • Airports Authority of India (AAI) successfully conducted at Kishangarh Airport, Rajasthan light trial using GAGAN (GPS Aided GEO Augmented Navigation)based LPV Approach Procedures.
About LPV
  • LPV (Localizer Performance with Vertical Guidance) permits aircraft guided approaches that are operationally nearly equivalent to Cat-IILS, without the need for ground-based navigational infrastructure.
  • The service relies on the availability of GPS and GAGAN Geo Stationary Satellites (GSAT-8, GSAT-10 and GSAT-15), launched by ISRO.
GAGAN
  • GAGAN is an Indian Satellite Based Augmentation System (SBAS) jointly developed by AAI and ISRO.
  • It is the first such system developed for India and neighboring countries in the equatorial region.
  • GAGAN System was certified by DGCA in 2015 for Approach with Vertical Guidance (APV 1) and en-route (RNP 0.1) operations.
  • There are only four Space-Based augmentation systems available in the world namely India (GAGAN), US(WAAS) Europe (EGNOS) and Japan (MSAS).
  • GAGAN is the first such system developed for India and neighboring countries in the equatorial region.
Benefits 
  • LPV approaches will make it possible to land at airportsnot equipped with expensive Instrument Landing Systems, which includes many small regional and local airports. Lowering the decision height up to 250 ft provides a substantial operational benefit in poor weather and low visibility conditions.
  • Thus, any airport which hitherto would require higher visibility minima, will be able to accept aircraft benefitting remote airports which are devoid of precision approach capability equipment.
GMS 
  • AAI in coordination with Indian National Centre for Ocean Information Services (INCOIS) has implemented GAGAN Message Service (GMS) through which alert messages to fishermen, formers, and disaster affected people will be sent on the occurrence of natural disasters, calamities, such as flood, earthquake etc.
  • The additional capabilities of GAGAN are also being explored to utilize it in non-aviation field such as Railways, Surveying, Agriculture, Power sector, Mining etc. 
Source-PIB 

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