The Global Positioning System (GPS) is a space-based satellite navigation system that is used for the location and obtaining information in all weather conditions, anywhere on or near the earth where there is an unhindered line of sight to four or more GPS satellites. The system provides critical capabilities to military, civil, and commercial users around the world. The United States government created the system, maintains it, and makes it freely accessible to anyone with a GPS receiver. Advances in technology and new demands on the existing system have now led to efforts to modernize the GPS system and implement the next generation of systems.
The Global Positioning System (GPS) is the modern way to dispassionately evaluate the spatial positioning of physical activity behavior. GPS is currently the most effective tool to comprehend the space within which physical activity is conducted. This envisages the use of a suitable device and efforts to maximize the observance of participants to work for the improvement of data quality especially over an extended period of time. This is considered the best way to collect high quality information for locating activities in scientific studies on the affiliation between objective activity and nature.
Studies conclusively proved that data loss was invariably interrelated with the measurement period during the participants had to wear the GPS device. The most obvious reasons for data loss included weak signals, low battery power and poor observance of the participants to specified codes of conduct.People who are not physically inactive are at greater risk of suffering from chronic diseases include heart diseases and diabetes. There are many activities that can help to avoid inactivity and therefore reduce the risk of such diseases. Lately, some approaches have been recommended that are useful for increased physical activity and therefore better health and avoidance of chronic diseases.
These include regular walking or jogging and other forms of exercise which improve blood circulation more effectively. GPS tracking systems are the most cost effective and inexpensive method for monitoring physical activities of participants that ensure good health and a much longer life. The best quantification of the environmental determinants depends on accurate assessment of the locations where physical activity takes place combined with appropriate assessment of the environmental characteristics of those locations. Since its deployment, the U.S. has implemented several improvements to the GPS service including new signals for civil use and increased accuracy and integrity for all users, all the while maintaining compatibility with existing GPS equipment.