PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-22:57:50
G03     188.9          17.6               10.0 +/-    1.10      23.5 +/-    1.10  0.130 / 0.130
G07     293.2          39.0                6.1 +/-    1.69       9.1 +/-    1.69  0.130 / 0.140
G08     140.4          30.2               12.2 +/-    1.16      21.3 +/-    1.16  0.090 / 0.090
G09     319.5          64.8                6.0 +/-    0.39       6.6 +/-    0.39  0.080 / 0.110
G16     42.3           37.9                6.4 +/-    0.85       9.6 +/-    0.85  0.050 / 0.070
G23     124.3          76.4                6.3 +/-    0.95       6.5 +/-    0.95  0.060 / 0.060
G27     94.6           34.8                9.4 +/-    1.13      15.0 +/-    1.13  0.080 / 0.080
G30     277.1          17.1                8.8 +/-    1.90      20.9 +/-    1.90  0.070 / 0.080