PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-00:12:50
G01     52.6           27.1                8.4 +/-    2.17      15.7 +/-    2.17  0.140 / 0.120
G06     179.0          21.7               14.0 +/-    1.70      29.5 +/-    1.70  0.090 / 0.150
G07     145.4          15.5               13.6 +/-    2.63      33.4 +/-    2.63  0.040 / 0.050
G11     46.2           19.7                8.7 +/-    1.98      19.4 +/-    1.98  0.040 / 0.040
G13     254.3          31.8               11.4 +/-    3.29      19.2 +/-    3.29  0.030 / 0.020
G15     285.9          16.3               12.0 +/-    1.03      29.0 +/-    1.03  0.020 / 0.020
G17     284.2          77.2                9.8 +/-    0.60      10.0 +/-    0.60  0.120 / 0.220
G19     242.4          57.4               10.0 +/-    2.15      11.6 +/-    2.15  0.120 / 0.190
G28     48.9           53.7               10.7 +/-    1.23      12.9 +/-    1.23  0.070 / 0.110
G30     147.6          41.4               13.6 +/-    0.54      19.3 +/-    0.54  0.090 / 0.140