PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-23:28:00
G02     199.3          18.1               17.3 +/-    1.86      39.7 +/-    1.86  0.040 / 0.030
G06     172.4          49.5               13.8 +/-    0.69      17.5 +/-    0.69  0.040 / 0.020
G13     230.6          15.7               17.2 +/-    3.19      42.1 +/-    3.19  0.120 / 0.080
G17     8.2            66.1               10.1 +/-    0.57      10.9 +/-    0.57  0.190 / 0.090
G19     306.7          71.1               12.1 +/-    0.39      12.7 +/-    0.39  0.080 / 0.070
G24     312.6          26.5               10.8 +/-    1.20      20.5 +/-    1.20  0.160 / 0.060
G28     83.8           41.6               11.4 +/-    1.36      16.1 +/-    1.36  0.050 / 0.080
G30     156.0          16.7               16.5 +/-    2.13      39.3 +/-    2.13  0.040 / 0.060