UTC-3:   03   06   09   12   15   18   21   24
mdts    255  256  257  258  259  259  260  261
mdww    281  283  295  300  309  327  346    4
shts    1.8  1.8  1.9  1.8  1.8  1.8  1.7  1.7
shww    0.7  0.7  0.5  0.5  0.4  0.4  0.2  0.2