PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-03:27:50
G01     107.6          25.0                6.1 +/-    0.58      11.9 +/-    0.58  0.030 / 0.050
G07     107.5          56.3                5.4 +/-    0.83       6.3 +/-    0.83  0.030 / 0.050
G08     41.5           18.4                2.7 +/-    0.72       6.1 +/-    0.72  0.050 / 0.060
G09     173.8          12.9                4.9 +/-    1.31      12.7 +/-    1.31  0.040 / 0.050
G11     87.4           42.5                4.9 +/-    0.47       6.9 +/-    0.47  0.090 / 0.160
G13     309.9          28.7                2.4 +/-    1.56       4.3 +/-    1.56  0.100 / 0.180
G17     204.3          39.8                5.1 +/-    0.77       7.4 +/-    0.77  0.080 / 0.190
G18     77.3           23.2                2.5 +/-    0.49       5.0 +/-    0.49  0.080 / 0.170
G28     312.0          60.0                4.4 +/-    0.78       5.0 +/-    0.78  0.030 / 0.030
G30     13.8           77.4                4.4 +/-    0.68       4.5 +/-    0.68  0.030 / 0.040