PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-18:57:30
G02     332.9          79.1                7.9 +/-    0.34       8.0 +/-    0.34  0.040 / 0.100
G05     164.5          33.5               12.2 +/-    2.03      20.0 +/-    2.03  0.050 / 0.080
G06     42.1           38.2                5.8 +/-    0.81       8.7 +/-    0.81  0.030 / 0.070
G12     308.7          75.5                8.0 +/-    1.27       8.2 +/-    1.27  0.030 / 0.030
G17     86.4           10.8                8.7 +/-    2.59      23.8 +/-    2.59  0.100 / 0.160
G19     73.3           29.8                8.2 +/-    0.45      14.5 +/-    0.45  0.080 / 0.120
G24     226.8          22.2               14.2 +/-    2.87      29.6 +/-    2.87  0.030 / 0.030
G25     317.1          29.5                7.4 +/-    1.51      13.2 +/-    1.51  0.030 / 0.030