PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-05:43:10
G02     64.4           27.9                2.7 +/-    1.58       5.0 +/-    1.58  0.060 / 0.130
G05     51.9           55.3                4.9 +/-    0.51       5.9 +/-    0.51  0.060 / 0.110
G12     184.6          28.4                6.7 +/-    1.43      12.2 +/-    1.43  0.030 / 0.030
G13     125.0          18.3                6.0 +/-    1.67      13.8 +/-    1.67  0.030 / 0.030
G15     160.4          16.3                5.6 +/-    2.69      13.4 +/-    2.69  0.050 / 0.080
G20     217.2          45.3                7.5 +/-    1.18      10.0 +/-    1.18  0.080 / 0.070
G21     275.3          20.7                5.4 +/-    1.05      11.6 +/-    1.05  0.090 / 0.050
G25     231.9          48.6                6.8 +/-    2.03       8.8 +/-    2.03  0.090 / 0.070
G29     331.6          59.3                2.3 +/-    0.46       2.7 +/-    0.46  0.030 / 0.040