PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-04:43:10
G10     253.2          28.7               10.0 +/-    1.37      17.9 +/-    1.37  0.040 / 0.050
G13     51.0           28.3                5.0 +/-    1.04       9.1 +/-    1.04  0.040 / 0.050
G15     80.4           56.7                6.7 +/-    0.51       7.9 +/-    0.51  0.180 / 0.510
G16     291.8          15.4                6.7 +/-    2.13      16.6 +/-    2.13  0.110 / 0.480
G20     301.0          67.4                7.0 +/-    0.72       7.5 +/-    0.72  0.080 / 0.130
G21     337.0          62.0                6.4 +/-    0.57       7.1 +/-    0.57  0.070 / 0.130
G26     263.6          14.4                7.8 +/-    1.64      19.6 +/-    1.64  0.070 / 0.150
G29     165.9          47.1                8.8 +/-    0.79      11.5 +/-    0.79  0.070 / 0.180