PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-20:58:00
G01     92.6           31.3               14.3 +/-    1.26      24.3 +/-    1.26  0.340 / 0.240
G07     123.5          47.8               16.2 +/-    0.61      21.1 +/-    0.61  0.270 / 0.300
G08     42.4           12.7                9.4 +/-    3.51      24.8 +/-    3.51  0.070 / 0.100
G11     72.9           41.5               13.1 +/-    1.19      18.6 +/-    1.19  0.080 / 0.090
G13     297.2          35.1               15.0 +/-    3.53      23.9 +/-    3.53  0.070 / 0.160
G17     214.0          46.6               17.2 +/-    0.78      22.7 +/-    0.78  0.070 / 0.160
G18     66.4           24.4               12.9 +/-    1.23      25.4 +/-    1.23  0.040 / 0.020
G19     213.8          24.5               20.6 +/-    2.79      40.7 +/-    2.79  0.040 / 0.020
G28     346.0          61.8               13.8 +/-    0.55      15.5 +/-    0.55  0.030 / 0.010
G30     100.6          75.6               16.2 +/-    0.42      16.7 +/-    0.42  0.030 / 0.010