What is the proper coding for the Date/Time group of the 1st of the month at 1001 UTC?

The correct way to code the Date/Time group for the 1st of the month at 1001 UTC follows a specific format used in aviation weather reports. The format consists of eight digits where the first two digits represent the day of the month, followed by four digits for the time in hours and minutes in Coordinated Universal Time (UTC), which is suffixed with a 'Z' to indicate Zulu time.

In this scenario, since it is the 1st of the month, the day is represented as '01'. The time given is 1001, where '10' represents the hour and '01' represents the minute. Therefore, the full coding would be comprised of '01' for the day, '1001' for the time, and should end with 'Z' to denote the time zone.

Putting it all together, the proper coding results in '011001Z', where:

• '01' signifies the 1st day of the month,

• '1001' indicates the time of 10 hours and 01 minute,

• 'Z' confirms it is in UTC.

This makes '011001Z' the correct answer, aligning perfectly with the standard coding conventions used in aviation weather observations