Final answer:
It is generally true that AMOS sensor groups should be sited according to the FCM-S4-1994 Federal Standard to ensure accurate weather data collection at airports.
Step-by-step explanation:
The student's question is about whether AMOS sensor groups must be sited in accordance with the FCM-S4-1994, the Federal Standard for Siting Meteorological Sensors at Airports. To answer the question, it is generally true that AMOS (Automated Meteorological Observing System) sensors should be sited as per the guidelines set out in the Federal Standard FCM-S4-1994 to ensure the accuracy and reliability of weather data, which is critical for airport operations. These guidelines provide specifications on the optimal location and installation of sensors for measuring meteorological parameters such as wind speed and direction, temperature, humidity, barometric pressure, and visibility, with the aim of reducing the influence of surrounding infrastructure and natural obstacles on the sensors' readings.