Comparing GPS to GLONASS
When it comes to navigation systems, the possibilities of devices we can use are endless. Many associate GPS with navigation but are unaware of its other uses, such as time synchronisation.
Moreover, the increasing use of GLONASS is enhancing how we use GPS and paving the way for new technology. Both have their benefits as independent features, but they deliver the best result when paired together.
In the following article, we define the uses of GPS and GLONASS and discuss which system is better suited for specific roles. We consider how GPS and GLONASS is encompassed everyday navigation systems as well as specialised devices such as digital clocks, international time zone clocks and receivers.
What is GPS?
GPS stands for ‘Global Positioning System’. It is a satellite-based navigation system commonly used on mobile phones, Sat-Navs and other navigating devices that track their positioning in relation to surrounding areas.
There are currently 31 orbiting satellites in our atmosphere, travelling 11,000 nautical miles above the Earth. These satellites follow six orbital paths around the Earth, receiving and omitting signals to form a navigation system.
Each of these satellites completes two orbits around the Earth in one 24-hour period. Each one weighs around one ton and has a measurement of around 5 metres, with solar panels included. Their average life expectancy is ten years, with new satellites launched into orbit if and when they are required.
What is GLONASS?
GLONASS translates to Global Navigation Satellite System. It is an alternative navigation system to GPS. Though separate entities, GLONASS and GPS work together to deliver precise navigation data.
For example, the two systems correlate, using signals for high-precision clock synchronisation. At Wharton Electronics, we offer both 488HS4-GPS and GLONASS receivers, providing a precise coded time signal locked to the transmissions of the respective satellite chain.
The GLONASS space segment consists of 24 satellites in three orbital planes. The satellites orbit the earth about 1,060 km lower than GPS satellites. Each orbital plane contains eight satellites.
Differences Between GPS and GLONASS
In addition to their varying orbital distances from Earth, there are some notable differences between GPS and GLONASS.
GLONASS wasn’t considered an international navigation system until 2011, as the coverage wasn’t brilliant. However, GLONASS has improved since then and can offer much more intricate coverage.
On the other hand, GPS has been established since 1978, with the entire constellation of satellites becoming operational in 1993. Since then, GPS has been improving twofold and is, therefore, a widely trusted navigation tool.
GLONASS satellites, when orbiting, have the same codes for communication but use different frequencies. This allows satellites on the same planes to communicate directly with one another.
On the contrary, GPS satellites use the same radio frequencies but have different codes for communication. Each GPS satellite continuously transmits a microwave radio signal composed of two carriers, three to four codes, and a navigation message.
Which System is Better?
Many are looking for a competent and trustworthy tracking system to suit their needs.
GPS systems are often rated as the favourable option; however, the ever-changing improvements in GLONASS systems mean the difference between the two is drawing closer.
If you consider the accuracy of each system at low-to-mid latitudes, the GPS system works marginally better than GLONASS.
However, when navigating rural areas, where taller structures and dense regions may affect the signal, it is advisable to opt for a solution that uses both GPS and GLONASS.
GPS and GLONASS receiver systems from Wharton Electronics.
At Wharton electronics, we offer GPS and GLONASS time code receivers for various digital and world time zone clocks. Each device provides a long-lasting solution for many institutions such as schools, control rooms, laboratories, production, process and medical facilities, offices and reception areas.
If you want more information about our range of clocks and receivers, please do not hesitate to get in touch today.