Which component is used to address GPS signal inaccuracies caused by atmospheric conditions?

The correct choice is WAAS, which stands for Wide Area Augmentation System. This system is designed to enhance the accuracy of GPS signals by correcting errors caused by atmospheric disturbances, such as ionospheric delays, which can affect satellite signals as they travel through the atmosphere. WAAS does this by using a network of ground reference stations that monitor GPS satellite signals and calculate any potential errors. These corrections are then transmitted to geostational satellites, which relay the information back to GPS receivers, ensuring more reliable and precise positioning data for users.

In this context, Local GPS, Satellite Maintenance, and PPS upgrades do not specifically target atmospheric signal inaccuracies. Local GPS refers to general GPS functionality but lacks the augmentation capabilities provided by WAAS. Satellite Maintenance pertains to the upkeep of the satellites themselves but does not involve addressing atmospheric signal issues. PPS upgrades are related to the Precision Positioning Service, which provides enhanced accuracy for military applications, but they do not focus on correcting inaccuracies caused by atmospheric conditions in the same way that WAAS does.