You don't need a drone for that, and a normal solar powered drone is unlikely to help.
A solar powered drone normally does not have enough power to last the night, so it would be quite complex to get it down south. You would need landing sites.
And that requires land which is already inhabited unless you are planning on having it land on the water.
Then there is the complication of the licensing for that, especially if you want it uncontrolled for that time.
It is far simpler to use already inhabited areas.
And you don't even need that much.
Just have you and a friend go to various places, then drive or otherwise travel due east/west, and using clocks you have previously synchronised, compare the time of solar noon at that location.
Look at how much time difference there is, vs distance. And see how that compares as you go north or south.
If that is too difficult, you can instead just look at the night sky, and notice that regardless of where you are in the southern hemisphere, you can see a point due south that the stars appear to circle.
Or you can just look at the southern summer, and see how the further south you go the more daylight hours you get.
Or you can look at flights between these southern locations, and notice how the depart heading partly south and arrive partly from the south.
All of this collectively shows that there is a point due south of everyone, i.e. that it converges.
So if you want that, we already have it.
much of the land and water south of the 60th parallel is no-fly zone.
That is just your repeated, pathetic assertion that you can't justify at all.
Head to the Langley area of McLean, VA.
So in an attempt to pretend Antarctica is a no fly zone, you pick a location no where near it.
Or you can just read this article
Where like you it just asserts pathetic crap without actually providing any meaningful reference.
And even then, you still manage to lie about it.
For the most part, this is providing reasons why you shouldn't, not why you can't.
The only attempt at a reason you can't would be appealing to the "legal reasons".
Except it spouts pure BS.
It appeals to Article 8 of the Protocol on Environmental Protection; claiming it is about the regulation of non-indigenous species.
Except article 8 has nothing to do with that.
It is just spouting complete and utter shit.
If you think there is something that prohibits it, provide a link or reference to the legal instrument, and a quote clearly showing where.
Otherwise, like usual, you are just spouting crap.
Yup, what did I say?
Complete and utter crap which you cannot justify with any valid reference.