Questions & Answers on GNSS

Apr 10, 2017

The Global Positioning System (GPS) is a satellite-based navigation system made up of over 24 satellites. GPS works in any weather conditions, anywhere in the world, 24 hours a day, with no subscription fees or setup charges. The U.S. Department of Defense (USDOD) originally put the satellites into orbit for military use, but they were made available for civilian use in the 1980s.GPS Technology op...read more

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GLONASS Frequency Bands

GNSS

Editorial Team

Mar 27, 2017

GLONASS (Globalnaya Navigatsionnaya Sputnikovaya Sistema) is a Russian Aerospace Defense Force-operated satellite-based navigation system.The GLONASS GNSS solution operates in the following frequency bands:L1 Band: 1589.0625 MHz to 1605.375 MHzL2 Band: 1242.9375 MHz to 1248.625 MHzL3 Band: 1201 MHz

BeiDou Frequency Bands

GNSS

Mark Hunter

Sep 18, 2018

Beidou is now in its 3rd phase of development (BDS-3), the BDS space constellation will gradually transition from BDS-2’s to BDS-3’s.The basic space constellation of BDS-3 consists of 3 GEO satellites, 3 IGSO satellites, and 24 MEO satellites.BDS-3 defines three open service signals:B1C: 1575.42 MHz with a bandwidth of 32.736 MHzB2a:1176.45 MHz with a bandwidth of 20.46 MHzB3I: 1268.52 MHz with ...read more

Galileo Frequency Bands

GNSS

Editorial Team

Mar 27, 2017

Galileo is Europe's GNSS solution (i.e Europe's version of GPS). As of December 2016, 18 of the 30 planned satellites are in orbit. Galileo has started offering Early Operational Capability and is expected to be fully operational in 2019. The Galileo GNSS solution operates in the following frequency bands:Galileo E1 Band: 1559 MHz to 1591 MHz with a center frequency of 1575.42 MHzGalileo E6 Band:1...read more

IRNSS Frequency Bands

GNSS

Editorial Team

Sep 20, 2017

IRNSS (Indian Regional Navigation Satellite System) is a GNSS Solution developed by India. It operates in two bands with a center frequency of 1176.45 MHz and 2492.028 MHz.IRNSS-1, L5: 1164.45 MHz to 1188.45 MHz i.e Center Frequency of 1176.45 MHz with 24 MHz bandwidthIRNSS-1, S-Band: 2483.778 MHz to 2500.278 MHz i.e Center Frequency of 1176.45 MHz with 16.5 MHz bandwidth

What is SBAS?

GNSS

Editorial Team

Sep 20, 2017

SBAS stands for SatelliteBased Augmentation System. It consists of a number of strategically placed ground stations that act as reference points for existing GNSS systems. Since the position of these reference/ground stations are fixed, they can be used to calculate GNSS errors. This information collected at each reference/ground station is transferred to a central location and then broadcasted ov...read more

QZSS Frequency Bands

GNSS

Editorial Team

Apr 10, 2017

The Quasi-Zenith Satellite System (QZSS) is a regional navigation satellite system commissioned by the Japanese Government. The first satellite was launched in 2010. Three additional satellites will be launched by the end of 2017 and the QZSS solution will be operational in 2018.The QZSS GNSS solution operates in the following frequency bands:QZSS L5 Band: 1176.45 MHz with a 24 MHz bandwidthQZSS L...read more

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What is GPS III?

GNSS

Editorial Team

Jan 5, 2018

GPS III is the third generation of GPS satellites being developed by Lockheed Martin. GPS III satellites will have 3x better accuracy and up to 8x improved anti-jamming capabilities. These satellites will send the new L1C civil signal that makes them the first GPS satellite broadcasting a compatible signal with other international global navigation satellite systems, like Galileo, therby improving...read more

What is ERA-GLONASS?

GNSS

Editorial Team

Sep 19, 2018

ERA-GLONASS is a Russian automated emergency response system that combines mobile communications and satellite positioning to provide rapid assistance to motorists in the event of a collision. This system will reduce emergency services’ time-to-arrival by up to 30%, saving up to 4,000 additional lives every year. It is the Russian equivalent of eCall which was launched in Europe and made mandatory...read more

What is the L1C GPS Signal?

GNSS

Editorial Team

Jan 5, 2018

The L1C GPS signal was developed by the US and Europe as a common civil signal for GPS and Galileo. It features a Multiplexed Binary Offset Carrier (MBOC) modulation scheme that enables it to work with Galileo and other GNSS Constellations while ensuring that the US national security interests are protected. This is part of the L1 Band so operates at 1575 MHz. This signal is being used by GPS III.

What is QZSS (Quasi-Zenith Satellite System)?

GNSS

Editorial Team

Apr 10, 2017

The Quasi-Zenith Satellite System (QZSS) is a regional navigation satellite system commissioned by the Japanese Government. It was authorized by the Japanese government in 2002. The first satellite, was launched in 2010 and three additional satellites are expected by be in orbit by the end of 2017. The four-satellite system is planned to be operational in 2018.The QZSS service will work East Asia ...read more

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What is GAGAN?

GNSS

Editorial Team

Sep 20, 2017

GAGAN (GPS Aided Geo Augmented Navigation) is a Satellite Based Augmentation System (SBAS) put in place by ISRO and Airport Authority of India for the Indian Airspace. SBAS systems help improve the accuracy of GNSS solutions in a specific region. GAGAN consists of a number of fixed ground stations across the Indian sub-continent which act as reference points for GNSS solutions in the region.GAGAN ...read more

What is Untethered Dead Reckoning?

GNSS

Answer

What is IRNSS?

GNSS

Editorial Team

Apr 11, 2017

IRNSS is India’s version of GPS (Global Positioning System). The Indian Regional Navigation Satellite System (IRNSS) was developed as an independent GNSS solution to provide accurate positioning data to users in India and up to 1500 km around the country. It provides position accuracy of better than 20 m in its primary service area.The operational name for the Indian GNSS system is NAVIC which mea...read more

What is Differential GPS (DGPS)?

GNSS

Answer

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