PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-01:42:50
G01     124.0          14.2                7.5 +/-    1.82      19.1 +/-    1.82  0.070 / 0.090
G07     64.3           68.7                5.4 +/-    0.27       5.8 +/-    0.27  0.090 / 0.080
G08     48.4           37.4                4.5 +/-    1.04       6.9 +/-    1.04  0.140 / 0.410
G09     178.5          32.9                6.9 +/-    0.79      11.5 +/-    0.79  0.170 / 0.250
G11     116.1          36.8                7.5 +/-    0.66      11.5 +/-    0.66  0.030 / 0.030
G13     320.4          13.8                1.6 +/-    1.82       4.1 +/-    1.82  0.030 / 0.030
G17     200.7          18.5                6.1 +/-    1.56      13.9 +/-    1.56  0.040 / 0.050
G28     283.7          55.3                4.8 +/-    2.18       5.7 +/-    2.18  0.030 / 0.050
G30     344.1          66.2                4.3 +/-    0.69       4.7 +/-    0.69  0.150 / 0.250