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               10.2 +/-    1.23      17.7 +/-    1.23  0.040 / 0.050
G07     140.9          17.8               14.1 +/-    2.47      32.8 +/-    2.47  0.050 / 0.040
G11     48.2           24.3                9.6 +/-    1.73      19.0 +/-    1.73  0.130 / 0.200
G13     263.3          36.5               12.1 +/-    2.42      18.8 +/-    2.42  0.080 / 0.130
G15     294.4          16.6                7.2 +/-    1.16      17.3 +/-    1.16  0.150 / 0.150
G17     252.3          75.6               12.6 +/-    0.38      13.0 +/-    0.38  0.080 / 0.150
G18     41.9           12.5                9.1 +/-    1.98      24.1 +/-    1.98  0.090 / 0.090
G19     230.4          50.0               13.3 +/-    2.60      16.8 +/-    2.60  0.090 / 0.080
G28     24.8           59.3               11.5 +/-    0.87      13.1 +/-    0.87  0.070 / 0.130
G30     142.3          51.3               13.6 +/-    0.73      16.8 +/-    0.73  0.080 / 0.140