PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-19:27:50
G01     106.9          25.7               12.2 +/-    0.57      23.6 +/-    0.57  0.070 / 0.130
G07     106.8          58.6               12.6 +/-    0.38      14.5 +/-    0.38  0.060 / 0.130
G08     42.3           23.0                8.2 +/-    0.78      16.8 +/-    0.78  0.080 / 0.150
G09     175.1          13.8               15.5 +/-    1.19      39.6 +/-    1.19  0.100 / 0.180
G11     90.5           43.2               12.1 +/-    0.39      16.7 +/-    0.39  0.030 / 0.050
G13     309.7          28.5                9.7 +/-    1.05      17.5 +/-    1.05  0.020 / 0.040
G17     207.0          34.2               14.4 +/-    1.31      23.1 +/-    1.31  0.040 / 0.060
G18     80.7           24.4               11.9 +/-    1.33      23.5 +/-    1.33  0.040 / 0.050
G28     318.9          61.1               12.0 +/-    0.53      13.4 +/-    0.53  0.030 / 0.070
G30     31.5           78.3               11.6 +/-    0.68      11.9 +/-    0.68  0.030 / 0.080