The D5 doesn't have built in GPS, and adding it requires an attachment. I don't know if the smartphone app works on that model, but it is from the same year as my D5600 which does support it. The app provides GPS but also drains the battery fast. I turned airplane mode on after the first dead battery.
replyGPS might work out there though: https://www.nasa.gov/directorates/somd/space-communications-...
If you use a regular smartphone in space (or technically in orbit for this argument), it’s probably not going to get a fix because GPS receivers are required to stop locating when reaching some speed to not be export controlled. And that speed is picked so people don’t build missiles, orbital speed will be higher.
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