PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-16:43:10
G01     37.8           10.3                8.8 +/-    4.62      24.4 +/-    4.62  0.150 / 0.220
G02     200.4          14.0               10.9 +/-    3.28      27.7 +/-    3.28  0.150 / 0.220
G06     170.7          49.5               12.7 +/-    0.67      16.1 +/-    0.67  0.090 / 0.180
G13     231.0          16.6               10.1 +/-    1.98      24.2 +/-    1.98  0.150 / 0.140
G17     15.1           64.1                8.8 +/-    0.61       9.6 +/-    0.61  0.110 / 0.290
G19     295.0          69.8                9.6 +/-    0.34      10.1 +/-    0.34  0.090 / 0.420
G24     312.6          26.7                8.8 +/-    0.71      16.6 +/-    0.71  0.180 / 0.240
G28     81.6           42.8               10.3 +/-    0.72      14.3 +/-    0.72  0.240 / 0.280
G30     156.7          20.6                9.2 +/-    0.88      20.0 +/-    0.88  0.040 / 0.050