PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-18:57:50
G01     59.8           30.5               11.5 +/-    1.15      19.9 +/-    1.15  0.140 / 0.220
G07     142.5          22.4               13.9 +/-    1.81      28.9 +/-    1.81  0.160 / 0.270
G11     48.3           24.0               11.7 +/-    1.65      23.4 +/-    1.65  0.070 / 0.120
G13     262.3          35.1               15.3 +/-    2.26      24.2 +/-    2.26  0.090 / 0.110
G15     294.4          16.0               13.0 +/-    1.15      31.6 +/-    1.15  0.040 / 0.050
G17     255.5          74.3               14.7 +/-    0.57      15.2 +/-    0.57  0.040 / 0.050
G18     42.3           12.9               10.5 +/-    1.45      27.5 +/-    1.45  0.060 / 0.080
G19     232.7          49.1               15.1 +/-    1.73      19.3 +/-    1.73  0.060 / 0.070
G28     36.5           56.5               12.6 +/-    1.40      14.7 +/-    1.40  0.120 / 0.170
G30     143.9          51.6               13.6 +/-    0.73      16.8 +/-    0.73  0.300 / 0.270