PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-19:28:10
G01     78.3           33.3               13.8 +/-    0.83      22.6 +/-    0.83  0.090 / 0.200
G07     133.5          37.1               15.6 +/-    1.28      23.8 +/-    1.28  0.080 / 0.210
G11     59.3           35.5               11.9 +/-    0.50      18.7 +/-    0.50  0.040 / 0.030
G13     282.6          37.7               15.5 +/-    1.30      23.4 +/-    1.30  0.030 / 0.030
G15     308.2          13.5               12.0 +/-    1.24      30.9 +/-    1.24  0.060 / 0.100
G17     224.0          59.9               16.2 +/-    1.22      18.4 +/-    1.22  0.060 / 0.130
G18     54.6           21.2                9.8 +/-    1.05      21.0 +/-    1.05  0.030 / 0.060
G19     220.0          34.8               16.0 +/-    0.87      25.4 +/-    0.87  0.050 / 0.040
G28     8.8            60.5               12.6 +/-    0.46      14.2 +/-    0.46  0.050 / 0.080
G30     127.6          66.8               15.8 +/-    0.53      17.0 +/-    0.53  0.040 / 0.080