PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-19:12:50
G01     61.1           30.6               10.0 +/-    0.34      17.3 +/-    0.34  0.030 / 0.060
G07     140.9          17.8               13.9 +/-    1.69      32.3 +/-    1.69  0.040 / 0.060
G11     48.2           24.3                9.6 +/-    1.68      19.1 +/-    1.68  0.150 / 0.230
G13     263.3          36.5               12.7 +/-    1.88      19.6 +/-    1.88  0.170 / 0.270
G15     294.4          16.6                6.9 +/-    1.77      16.6 +/-    1.77  0.050 / 0.060
G17     252.3          75.6               11.9 +/-    1.03      12.3 +/-    1.03  0.040 / 0.060
G18     41.9           12.5                8.3 +/-    0.94      21.9 +/-    0.94  0.060 / 0.110
G19     230.4          50.0               12.8 +/-    1.31      16.2 +/-    1.31  0.060 / 0.100
G28     24.8           59.3               10.9 +/-    0.60      12.5 +/-    0.60  0.070 / 0.120
G30     142.3          51.3               13.2 +/-    0.76      16.4 +/-    0.76  0.060 / 0.140