PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-23:13:00
G01     40.0           14.5                9.5 +/-    3.06      24.0 +/-    3.06  0.110 / 0.090
G02     199.0          11.7               12.8 +/-   20.64      34.3 +/-   20.64  0.140 / 0.090
G06     174.3          42.1               15.1 +/-    0.90      21.2 +/-    0.90  0.110 / 0.130
G13     235.9          20.3               15.2 +/-    4.07      33.2 +/-    4.07  0.110 / 0.290
G15     268.4          11.4               14.9 +/-    1.10      40.3 +/-    1.10  0.070 / 0.030
G17     354.5          71.0               10.7 +/-    0.45      11.2 +/-    0.45  0.080 / 0.030
G19     284.0          69.6               12.9 +/-    0.32      13.7 +/-    0.32  0.110 / 0.070
G24     315.7          21.2               10.4 +/-    2.80      22.3 +/-    2.80  0.090 / 0.100
G28     75.5           45.2               12.5 +/-    1.20      16.9 +/-    1.20  0.350 / 0.090
G30     154.7          23.2               17.2 +/-    1.19      35.1 +/-    1.19  0.100 / 0.130