PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-14:43:00
G01     116.8          18.6               10.3 +/-    1.82      23.5 +/-    1.82  0.030 / 0.040
G07     91.2           61.6                9.3 +/-    0.39      10.5 +/-    0.39  0.030 / 0.050
G08     44.8           31.6                7.5 +/-    0.81      12.6 +/-    0.81  0.030 / 0.080
G09     177.4          25.7                8.2 +/-    1.02      15.8 +/-    1.02  0.040 / 0.060
G11     104.0          41.4               10.0 +/-    0.88      14.2 +/-    0.88  0.060 / 0.100
G13     316.5          21.7                6.2 +/-    2.88      13.0 +/-    2.88  0.070 / 0.100
G17     201.9          24.4                8.1 +/-    1.53      16.0 +/-    1.53  0.110 / 0.360
G18     91.2           21.3                8.2 +/-    1.11      17.4 +/-    1.11  0.130 / 0.270
G28     287.2          54.4               10.0 +/-    0.75      12.0 +/-    0.75  0.070 / 0.190
G30     356.5          71.9                8.5 +/-    0.81       8.9 +/-    0.81  0.080 / 0.180