PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/08-21:43:00
G01     88.1           32.3               11.1 +/-    1.49      18.5 +/-    1.49  0.170 / 0.240
G07     127.1          44.4               13.8 +/-    0.87      18.7 +/-    0.87  0.080 / 0.370
G08     42.9           10.1                8.6 +/-    2.36      24.0 +/-    2.36  0.020 / 0.030
G11     68.6           40.3               11.5 +/-    0.96      16.6 +/-    0.96  0.030 / 0.030
G13     292.9          36.2               12.7 +/-    3.73      19.6 +/-    3.73  0.080 / 0.090
G17     216.6          51.0               14.5 +/-    0.98      18.1 +/-    0.98  0.070 / 0.100
G18     62.5           23.7                9.7 +/-    1.03      19.6 +/-    1.03  0.060 / 0.050
G19     215.6          28.2               14.2 +/-    1.91      25.8 +/-    1.91  0.040 / 0.040
G28     353.7          61.6               10.8 +/-    0.73      12.1 +/-    0.73  0.050 / 0.110
G30     112.5          72.5               13.0 +/-    0.47      13.6 +/-    0.47  0.060 / 0.140