Check a map! All three are either on the east coast or have no shelter from it, so are exposed to the E/NE/N winds which are the only really cold ones we get.
The uncertainty seems to be (according to more than one source I've found) that both discovered it independently at about the same time. Hooke probably first, but Cassini published and took credit. Cassini's complete papers were published as 'Oeuvres diverses' in 1730 - earlier references may be in the papers of the Academie des Sciences (for Cassini) or the Royal Society (for Hooke).
Another line of enquiry may be through the work of WF Denning: I found this paper online which talks about his analysis of the spot including a historical analysis (see start of page 22 in that link), and footnote 28 to that chapter (see this document) is a paper which should probably point to the primary sources.
In response to the question 'was the red spot known about in the 1660s?' every source I've checked, including the Chambers Biographical Dictionary and a history by John Gribbin, gives the attribution of the discovery to Hooke and/or Cassini - that's sufficiently many independent sources I trust that I'm not inclined to doubt them all.
Another perspective is that the amount of money being pumped back into the economy by so-called unsolicited commercial e-mail is nothing to scoff at ... but how does it compare to the cost of the infrastructure needed to send them all in the first place?
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Check a map! All three are either on the east coast or have no shelter from it, so are exposed to the E/NE/N winds which are the only really cold ones we get.
The uncertainty seems to be (according to more than one source I've found) that both discovered it independently at about the same time. Hooke probably first, but Cassini published and took credit. Cassini's complete papers were published as 'Oeuvres diverses' in 1730 - earlier references may be in the papers of the Academie des Sciences (for Cassini) or the Royal Society (for Hooke). Another line of enquiry may be through the work of WF Denning: I found this paper online which talks about his analysis of the spot including a historical analysis (see start of page 22 in that link), and footnote 28 to that chapter (see this document) is a paper which should probably point to the primary sources. In response to the question 'was the red spot known about in the 1660s?' every source I've checked, including the Chambers Biographical Dictionary and a history by John Gribbin, gives the attribution of the discovery to Hooke and/or Cassini - that's sufficiently many independent sources I trust that I'm not inclined to doubt them all.
This link [St Andrew's University, UK] credits Hooke with determining that Jupiter rotates and this link [Wikipedia] and [Encylopaedia Britannica] credit discovery of the GRS to either Hooke or Cassini around 1665. Schwabe was the first person to produce an accurate drawing and description of the GRS.
Another perspective is that the amount of money being pumped back into the economy by so-called unsolicited commercial e-mail is nothing to scoff at
... but how does it compare to the cost of the infrastructure needed to send them all in the first place?