PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-17:42:50
G02     222.2          64.5                8.9 +/-    0.78       9.7 +/-    0.78  0.080 / 0.100
G06     47.5           69.0                8.4 +/-    0.33       8.9 +/-    0.33  0.080 / 0.100
G12     319.3          39.9                7.4 +/-    1.04      10.8 +/-    1.04  0.030 / 0.030
G17     60.0           31.1                8.1 +/-    1.31      13.9 +/-    1.31  0.030 / 0.040
G19     46.6           44.3                7.2 +/-    0.79       9.8 +/-    0.79  0.120 / 0.390
G24     258.3          39.6               11.2 +/-    2.69      16.4 +/-    2.69  0.160 / 0.460
G28     124.7          14.7                8.3 +/-    1.74      20.7 +/-    1.74  0.050 / 0.080