PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-14:58:10
G02     200.8          17.9                9.9 +/-    1.62      23.0 +/-    1.62  0.100 / 0.250
G06     171.9          52.4               10.9 +/-    0.90      13.3 +/-    0.90  0.080 / 0.250
G13     229.9          14.0                8.6 +/-    3.56      21.8 +/-    3.56  0.080 / 0.170
G17     24.5           58.6                8.5 +/-    0.63       9.8 +/-    0.63  0.070 / 0.160
G19     326.9          71.5                8.5 +/-    0.53       9.0 +/-    0.53  0.120 / 0.300
G24     311.9          27.4                6.1 +/-    2.26      11.3 +/-    2.26  0.140 / 0.380
G28     87.3           40.0                7.5 +/-    1.16      10.9 +/-    1.16  0.020 / 0.040
G30     157.4          17.1                8.9 +/-    0.95      21.1 +/-    0.95  0.020 / 0.040