PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-21:58:10
G01     43.9           20.0               11.0 +/-    2.51      24.2 +/-    2.51  0.080 / 0.090
G06     175.7          34.3               16.3 +/-    1.62      26.1 +/-    1.62  0.060 / 0.100
G13     242.3          25.2               16.0 +/-    1.62      31.1 +/-    1.62  0.100 / 0.240
G15     275.5          13.8               11.7 +/-    1.89      29.9 +/-    1.89  0.070 / 0.190
G17     332.8          75.3               13.8 +/-    0.32      14.2 +/-    0.32  0.040 / 0.050
G19     262.9          65.4               15.7 +/-    0.88      17.1 +/-    0.88  0.040 / 0.070
G24     317.9          15.2               10.2 +/-    2.91      25.2 +/-    2.91  0.070 / 0.110
G28     65.5           48.9               12.7 +/-    1.37      16.2 +/-    1.37  0.080 / 0.110
G30     152.7          31.1               14.3 +/-    1.37      24.5 +/-    1.37  0.190 / 0.370