In order to adhere to Federal Communications Commission rules, cellular phone companies must be able to deliver authorities with mobile phone latitude and longitude to an precision of 50 to 300 meters. Cell Tower Triangulation isn’t going to always satisfy this condition. By way of evaluation, commercially available GPS modules are able to obtain accuracy right down to less than 10 meters. This depends upon a lot of factors, as GPS signals are often very weak and are affected by numerous variables. With Mobile Location Services (MLS), the GSM cell network provider utilizes triangulation algorithms to compute the position of the device, its accuracy is proven to be much worse than that of GPS. MLS is further affected by the same issues as GPS in the sense of the interference impeding signal quality and the density of GSM towers to help in the triangulation effort. In rural areas position accuracy may be off as much as a mile. GPS receivers, whether or not inside of a smartphone, or a specific GPS tracking device, determine specific location by way of precisely timing the signals sent by GPS satellites. This critical information involves the moment the message was transmitted, accurate orbital information (formally called the ephemeris), as well as the general system state and determined orbits of all GPS satellites (technically called the almanac). GPS receivers often take a long time to become ready to use after it’s turned on because it must acquire some basic information in addition to capturing GPS satellite signals. This delay can be caused if the GPS mobile phone has been unused for days or weeks, or has been transported a significant distance while turned off. The GPS must update its almanac and ephemeris data and store it in memory. The GPS almanac is a set of data that every GPS satellite transmits. When a GPS receiver has current almanac data in memory, it can capture satellite signals and find initial position more quickly.