It looks like you've shared a log entry from a amateur radio operation!

Here's a breakdown of the information:

* `09:57`: The time the transmission occurred (9:57 AM, assuming a 24-hour clock).

* `JH1HST`: The callsign of the amateur radio operator, indicating they are a licensed ham radio operator in Japan.

* `on JP-1174(Kawagoe Prefectural Park, JP-ST)`: This is likely a reference to a specific location where the transmission took place. It appears to be an identification of the park and prefecture in Japan (Kawagoe Prefectural Park, Saitama Prefecture, Japan).

* `3521.5 CW`: The frequency being used for this transmission is 3521.5 kHz, and it's a continuous wave (CW) transmission.

* `RBN`: This likely stands for "Reverse Beacon Network", which is an online platform that helps amateur radio operators locate other stations on the air. It appears to be reporting information about this transmission.

* `21 dB`: The signal strength of the transmission as reported by the RBN.

* `20 WPM`: The transmission speed, in words per minute (WPM). In this case, it's 20 words per minute.

* `via JO1YYP-#[JO1YYP-#]`: This appears to be a reference to a relay or repeater station that was used to facilitate the transmission. JO1YYP is likely another amateur radio operator's callsign, and the '#' symbol indicates it's an Internet-linked repeater (i.e., a remote-controlled repeater).