PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-17:12:40
G10     253.1          28.0               11.8 +/-    1.33      21.5 +/-    1.33  0.040 / 0.040
G13     51.8           29.4               10.0 +/-    1.72      17.8 +/-    1.72  0.050 / 0.040
G15     78.7           55.8               11.4 +/-    1.31      13.5 +/-    1.31  0.050 / 0.050
G16     298.2          13.3                9.6 +/-    1.29      24.8 +/-    1.29  0.050 / 0.060
G18     275.6          59.1               11.8 +/-    2.13      13.5 +/-    2.13  0.110 / 0.430
G20     43.6           47.7                9.8 +/-    0.99      12.7 +/-    0.99  0.080 / 0.430
G21     344.8          65.1               11.2 +/-    0.94      12.2 +/-    0.94  0.110 / 0.360
G26     268.6          14.1               10.2 +/-    2.00      25.9 +/-    2.00  0.090 / 0.330
G29     163.0          41.0               13.4 +/-    0.92      19.2 +/-    0.92  0.080 / 0.140