PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-17:27:40
G01     38.0           10.2                6.5 +/-    1.46      18.0 +/-    1.46  0.150 / 0.290
G02     201.1          11.5                5.8 +/-   16.15      15.6 +/-   16.15  0.110 / 0.220
G06     172.4          48.0               -2.4 +/-   19.41      -3.1 +/-   19.41  0.130 / 0.160
G13     233.1          17.1               15.8 +/-    8.89      37.5 +/-    8.89  0.110 / 0.140
G17     19.1           62.4               31.2 +/-   23.16      34.7 +/-   23.16  0.120 / 0.240
G19     310.4          72.2              -43.7 +/-   55.21     -45.7 +/-   55.21  0.080 / 0.270
G24     314.4          23.9                4.8 +/-    8.32       9.7 +/-    8.32  0.070 / 0.140
G28     81.6           42.8                4.9 +/-    8.03       6.8 +/-    8.03  0.080 / 0.130
G30     156.8          22.2                2.3 +/-   16.61       4.8 +/-   16.61  0.040 / 0.040