ISO files must be placed in the ms0:/ISO or ef0:/ISO (for PSP Go) root folder to be recognized.

Creating a thriving community for retro enthusiasts—what we’ll call the PSP ISO Club

If you are looking to get your games running on a real PSP or an emulator: How To Mod Any PSP On Any Firmware In 2026 | Full Guide

While PSP ISO Club is a popular choice, it's not the only option available. Here are some other alternatives:

 mooncalc.org
reverse calculation
from the moon altitude/azimuth at time
Moon Altitude: 0° - 90°
Moon Azimuth: 0° - 360°
Period calculation:
Accuracy: