You can use the 7-Zip open-source utility or other tools like WinZip and CloudConvert to extract the contents.
A woman in a flight suit appeared, her face illuminated by the cockpit lights. "If you're reading this, the 7-Zip archive worked. We had to compress the sensor data to fit the emergency burst transmission. This isn't just a flight log... it's a map to what we found under the ice." jpp.7z
A 7-Zip archive is a compressed file format that often offers better compression than standard ZIP files. You can use the 7-Zip open-source utility or