PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/19-13:27:50
G10     259.8          35.5                7.2 +/-    1.20      11.3 +/-    1.20  0.130 / 0.290
G13     45.4           22.3                3.7 +/-    2.03       7.8 +/-    2.03  0.100 / 0.250
G15     64.4           50.5                5.1 +/-    0.69       6.5 +/-    0.69  0.130 / 0.390
G16     285.4          14.7                0.3 +/-    3.90       0.7 +/-    3.90  0.120 / 0.300
G20     289.8          59.4                6.9 +/-    1.18       7.9 +/-    1.18  0.040 / 0.040
G21     351.5          67.5                4.4 +/-    0.51       4.8 +/-    0.51  0.040 / 0.050
G24     128.0          9.8               -14.9 +/-   21.92     -41.7 +/-   21.92  0.040 / 0.060
G26     260.1          11.3                3.8 +/-    3.74      10.2 +/-    3.74  0.040 / 0.060
G27     321.4          13.0                1.3 +/-    2.27       3.5 +/-    2.27  0.100 / 0.080
G29     166.2          40.3                7.2 +/-    1.11      10.5 +/-    1.11  0.070 / 0.070