Narrower strips are better: sec 8° = 1.01, so a strip of width 16° (centred on the equator) is accurate to within 1% or 1 part in 100.
Strip sane lewih rupek lewih becik: detik 8˚ = 1,01, dados strip antuk lambih 16˚ (mapusat ring equator) akurat kantos 1% utawi 1 kepah saking 100.