grid: /X (degree_east) periodic (0) to (2W) by 2.0 N= 180 pts :grid
grid: /Y (degree_north) ordered (88S) to (88N) by 2.0 N= 89 pts :grid
grid: /T (days since 1960-01-01) ordered [ (16 Jan 1854 - 15 Feb 1854) (16 Feb 1854 - 15 Mar 1854) (16 Mar 1854 - 15 Apr 1854) ... (16 Dec 2021 - 15 Jan 2022)] N= 2016 pts :grid