This appears to be a amateur radio message. Let's break it down:

* "11:02" indicates the time of day (11 hours and 2 minutes).

* "JM1WIJ/1" is the call sign of the amateur radio operator, which includes their license prefix ("JM1") and identifier ("WIJ").

* "/1" likely indicates that the operator's station is on a low-power setting or operating with a reduced capability (this can vary depending on the specific rules or modes in use).

* "JP-1221" is an identifier for the location, specifically Ueno Prefectural Park in Japan.

* "433140 FM QRT" refers to:

+ 433.140 MHz: The frequency being used by the operator.

+ "FM": The mode of transmission (Frequency Modulation).

+ "QRT": A callout to indicate that the station has signed off or is shutting down.

* "TNX[JM1WIJ]" means "Thanks" followed by the operator's call sign.