PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-18:58:00
G01     93.3           31.1               12.4 +/-    0.82      21.3 +/-    0.82  0.180 / 0.210
G07     122.9          48.3               13.0 +/-    0.64      16.8 +/-    0.64  0.160 / 0.360
G08     42.3           11.8                8.1 +/-    1.44      21.8 +/-    1.44  0.030 / 0.040
G11     72.9           41.3               12.2 +/-    0.47      17.4 +/-    0.47  0.040 / 0.040
G13     297.7          35.0               12.0 +/-    0.85      19.1 +/-    0.85  0.050 / 0.080
G17     213.3          47.7               15.6 +/-    1.43      20.3 +/-    1.43  0.050 / 0.090
G18     66.9           24.5               10.3 +/-    0.76      20.5 +/-    0.76  0.130 / 0.170
G19     213.6          23.3               14.9 +/-    1.52      30.3 +/-    1.52  0.110 / 0.230
G28     344.3          61.9               10.6 +/-    0.51      11.9 +/-    0.51  0.040 / 0.070
G30     96.0           77.0               12.9 +/-    0.62      13.2 +/-    0.62  0.040 / 0.060