FAQ

What is GNSS?

GNSS stands for Global Navigation Satellite System which is a constellation of satellites that provide autonomous geo-spatial positioning with global coverage. There are many GNSS systems, the most popular being the GPS of USA. GLONASS of Russia and Beidou of China are fully functional. Galileo of Europe, IRNSS of India, QZSS of Japan are under implementation. GNSS receivers determine location by using the timing and positioning data encoded in the signals from GNSS satellites.

What is the importance of monitoring?

Monitoring is a very important management process which ensures timely and successful completion of any activity. It is the most prevalent process present in all stages of execution of a project and hence it is termed as the background process by PMI. Any improvement in monitoring acts as a force multiplier for the entire activity.

Why GNSS based monitoring is required?

GNSS offers a cost effective, reliable and accurate means of locating men and material and hence can be used for tracking, in turn monitoring of any activity. It has got a global coverage which is available 24/7 hence same system can be used over larger area for monitoring purposes.

What all can be monitored through GNSS?

Since every human activity is Geo oriented, everything and anything on the surface on the earth can be monitored using satellite based navigation technology (GNSS &GIS).A few areas of applications are given in our “Solutions” page.

Why use GNSS for monitoring?

It is available round the clock, there is no break in service, most of the services are free hence it is cost effective, coverage is global hence it is available even in remote areas. Accuracy of the system is high hence it is most suited technology. In addition GNSS chips are small, passive and hence can be integrated easily.

Can monitoring solutions from another country be used directly in India?

We cannot use GNSS based systems and solutions from other countries directly in India. Each system has been optimized for better accuracy by the country of its origin over its own geographical extent hence they have large errors over India. They need to be adapted to Indian geography and environment.

Why GPS has got more errors in India than in America?

Accuracy of the GNSS and their receivers is not constant world over. Each system is optimized for the country or region of its origin and cannot be used directly over the Indian region. Present day receivers use a series of algorithms to arrive at a position. The type and accuracy of these algorithms over the Indian sub-region need to be examined. Further the ionospheric activity over the Indian region has not been modeled correctly giving raise to large errors in the range readings.

What infrastructure is required for accurate navigation?

In US WAAS based augmentation and CORS network based differential access is present to provide accurate navigational services all through the country. SDCM provides differential access all through Russia. Similar services are present in Europe also. Such augmentation and differential access are required for providing accurate navigation in India also.

What are the types of GNSS that are available?

There are Primary Systems like GPS of USA, Galileo of the European Union, GLONASS of Russia, IRNSS of India, Beidou of China and QZSS of Japan.

There are Augmentation Systems like WAAS of USA,EGNOS of The European Union, GAGAN of India, COMPASS of China and MSAS of Japan.

There are Differential Systems like WADGPS of USA and SDCM of Russia. The European Union, Australia and Brazil use a differential system based on GPS-CORS network.

Apart from these there are assisted systems in each solution.

What is the importance of Asian region with respect to GNSS?

In the near future there will be about 150 satellites providing more than 10 different services. The Asian region stands to gain by these developments as it is in the region of maximum visibility to the GNSS satellites.

Why specialized training is required for Position-Navigation-Timing (PNT) Solutions?

Developing solutions using PNT technologies requires knowledge of geography, IT, GNSS, navigation etc. Some are arts, some are sciences, some are technologies and some are engineering solutions. No educational institutions provides a composite program to learn all these subjects. Hence people need to be trained specially in this field.