PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-09:58:10
G01     71.9           32.9                3.5 +/-    0.95       5.8 +/-    0.95  0.040 / 0.050
G07     136.7          30.4                5.2 +/-    1.05       9.1 +/-    1.05  0.050 / 0.050
G11     54.1           30.1                2.9 +/-    0.67       5.0 +/-    0.67  0.040 / 0.040
G13     278.0          36.9                5.2 +/-    0.66       8.0 +/-    0.66  0.040 / 0.040
G15     304.0          15.0                2.0 +/-    1.29       5.1 +/-    1.29  0.050 / 0.090
G17     232.9          70.5                5.3 +/-    0.73       5.6 +/-    0.73  0.040 / 0.080
G19     223.6          42.8                6.7 +/-    0.89       9.3 +/-    0.89  0.100 / 0.290
G28     18.8           59.3                3.4 +/-    0.24       3.9 +/-    0.24  0.090 / 0.330
G30     133.6          63.4                5.1 +/-    0.79       5.7 +/-    0.79  0.040 / 0.070