PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-21:58:00
G01     72.7           33.2                9.6 +/-    0.93      15.7 +/-    0.93  0.070 / 0.220
G07     136.5          33.0               12.3 +/-    1.36      20.2 +/-    1.36  0.110 / 0.270
G11     56.1           33.3                8.3 +/-    1.59      13.6 +/-    1.59  0.060 / 0.080
G13     277.0          37.5               11.9 +/-    1.72      18.0 +/-    1.72  0.060 / 0.080
G15     303.7          15.1                8.2 +/-    1.21      20.3 +/-    1.21  0.030 / 0.030
G17     229.6          62.9               12.9 +/-    1.06      14.3 +/-    1.06  0.040 / 0.030
G18     50.8           19.3                9.5 +/-    2.21      21.3 +/-    2.21  0.040 / 0.080
G19     223.1          39.9               13.1 +/-    1.44      19.1 +/-    1.44  0.070 / 0.090
G28     17.6           59.5               11.1 +/-    1.50      12.7 +/-    1.50  0.140 / 0.190
G30     133.7          61.1               13.1 +/-    0.49      14.7 +/-    0.49  0.100 / 0.180