PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-09:57:50
G10     270.1          40.7                6.4 +/-    0.97       9.2 +/-    0.97  0.040 / 0.040
G13     40.6           15.7                1.4 +/-    2.37       3.5 +/-    2.37  0.040 / 0.040
G15     56.1           46.1                2.9 +/-    1.43       3.9 +/-    1.43  0.240 / 0.440
G16     281.7          10.9                4.5 +/-    1.37      12.4 +/-    1.37  0.260 / 0.400
G20     303.3          61.5                4.9 +/-    0.88       5.5 +/-    0.88  0.080 / 0.110
G21     25.7           74.2                5.2 +/-    0.77       5.4 +/-    0.77  0.070 / 0.080
G24     116.2          15.9                5.5 +/-    2.31      13.4 +/-    2.31  0.130 / 0.230
G27     318.6          18.9                4.0 +/-    1.51       9.0 +/-    1.51  0.130 / 0.260
G29     165.5          24.3                7.0 +/-    0.95      13.8 +/-    0.95  0.140 / 0.270