PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/19-08:27:30
G10     264.1          37.3                5.4 +/-    1.22       8.2 +/-    1.22  0.040 / 0.040
G13     43.1           19.8                3.1 +/-    2.61       6.9 +/-    2.61  0.030 / 0.030
G15     61.6           50.0                3.7 +/-    0.95       4.6 +/-    0.95  0.070 / 0.130
G16     287.4          12.2                3.5 +/-    2.30       9.2 +/-    2.30  0.090 / 0.060
G20     292.8          59.1                3.8 +/-    1.03       4.3 +/-    1.03  0.180 / 0.350
G21     6.0            71.3                3.9 +/-    0.51       4.1 +/-    0.51  0.210 / 0.390
G24     121.2          12.7                4.1 +/-    1.77      10.8 +/-    1.77  0.110 / 0.210
G27     320.7          14.8                2.0 +/-    2.99       5.1 +/-    2.99  0.110 / 0.180
G29     164.4          29.0                5.6 +/-    1.39      10.1 +/-    1.39  0.180 / 0.360