What is GAGAN and NavIC?

The Indian government has stated that it intends to use the experience of creating the GAGAN system to enable the creation of an autonomous regional navigation system called the Indian Regional Navigation Satellite System (IRNSS), operationally known as NavIC (acronym for Navigation with Indian Constellation).

What is GAGAN in aviation?

Simply speaking, GAGAN is a Satellite Based Augmentation System or SBAS, which is a regional network of ground stations and satellites that provide GPS signal corrections, giving a better position accuracy. GPS is the most prevalent Global Navigation Satellite System (GNSS) and is owned by the US government.


GAGAN is the first SBAS system in the world to serve the equatorial region. GAGAN ionospheric algorithm known as ISRO GIVE Model-Multi-Layer Data Fusion (IGM-MLDF) was developed by ISRO and is operational in the implemented GAGAN System.

Is NaVIC better than GPS?

NavIC satellites use dual frequency bands (L5-band and S-band), which is why the system is relatively more accurate than GPS (that uses a single band and makes compensation for error due to signal deterioration by the atmosphere).

What is the need for GPS augmentation?

A GPS augmentation is any system that aids GPS by providing accuracy, integrity, availability, or any other improvement to positioning, navigation, and timing that is not inherently part of GPS itself. A wide range of different augmentation systems have been developed by both the public and private sectors.

What is the full form of Glonass?

GLONASS (Globalnaya Navigazionnaya Sputnikovaya Sistema, or Global Navigation Satellite System) is a global GNSS owned and operated by the Russian Federation. The fully operational system consists of 24+ satellites.

What type of modulation is used in the GPS?

Neither amplitude nor frequency modulation are used in GPS. It is the alteration of the phases of the carrier waves that encodes them. It is phase modulation that allows them to carry the codes from the satellites to the receivers.

What is WAAS aviation?

The Wide Area Augmentation System (WAAS) provides extremely accurate navigation capability by augmenting the Global Positioning System (GPS). It was developed for civil aviation by the Federal Aviation Administration (FAA) and covers most of the U.S. National Airspace System (NAS) as well as parts of Canada and Mexico.

What is the full form of GPS?

Global Positioning SystemGlobal Positioning System / Full name
The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services. This system consists of three segments: the space segment, the control segment, and the user segment.

What is the difference between GPS and NavIC?

Navic is the operational name of the Indian Regional Navigation Satellite System (IRNSS) developed by ISRO. Unlike GPS which is a Global tracking constellation, Navic has been designed to focus especially on India and adjoining regions (1500 Kms around India) and is a very significant achievement for the country.