Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Six examples of VISIR burst-mode imaging at 5 μm. The 2016 December, 2017 January, and 2017 February images were assembled from two sets of images, one targeting the north and one targeting the south. Horizontal numbered lines indicate regions discussed in the main text and Appendix, and a latitude scale is included on the right-hand side. The central meridian longitude is indicated in each frame.
