PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-20:12:50
G01     105.0          26.7               13.4 +/-    1.61      25.1 +/-    1.61  0.060 / 0.140
G07     109.7          57.2               13.8 +/-    0.49      16.1 +/-    0.49  0.070 / 0.120
G08     42.2           21.9                9.1 +/-    3.37      19.1 +/-    3.37  0.100 / 0.380
G09     174.9          12.3               16.5 +/-    3.57      43.6 +/-    3.57  0.190 / 0.200
G11     88.2           43.3               14.7 +/-    0.95      20.3 +/-    0.95  0.070 / 0.130
G13     308.2          29.6               11.5 +/-    1.28      20.2 +/-    1.28  0.070 / 0.120
G17     208.0          35.6               14.5 +/-    1.07      22.7 +/-    1.07  0.030 / 0.030
G18     78.7           24.6               13.1 +/-    1.79      25.8 +/-    1.79  0.030 / 0.030
G28     322.8          61.4               11.7 +/-    0.77      13.1 +/-    0.77  0.020 / 0.020
G30     43.3           78.8               13.1 +/-    1.04      13.3 +/-    1.04  0.030 / 0.030