Missile guidance - Wikipedia Missile guidance refers to a variety of methods of guiding a missile or a guided bomb to its intended target. The missile's target accuracy is a critical factor for its effectiveness. Guidance systems improve missile accuracy by improving its Probability of Guidance (Pg). Error analysis for the Global Positioning System - Wikipedia Another restriction on GPS, antispoofing, remains on. This encrypts the P-code so that it cannot be mimicked by a transmitter sending false information. Few civilian receivers have ever used the P-code, and the accuracy attainable with the public C/A code was much better than originally expected (especially with DGPS), so much so that the antispoof policy has relatively little SMART FARMING: IOT Based Smart Sensor Agriculture Stick for Jul 16, 2020The whole system was developed using five in field sensor stations which collect the data and send it to the base station using a global positioning system (GPS) where necessary action was taken for controlling irrigation according to the database available with the system. In [9] Ms. Roopashree V. et. al, IOT in Indian Agriculture