Month

Y= Developed local short term ground station, (mm/month)

X= TRMM reading, (mm/month)

STDEV

January

Y = 0.98 X ? 1.57

1.96

February

Y = 0.9 X ? 1.05

2

March

Y = 0.86 X ? 1.16

2.24

December

Y = 1.03 X ? 1.13

3.23