PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-23:28:00
G07     326.1          55.2                7.5 +/-    1.01       8.9 +/-    1.01  0.050 / 0.080
G08     109.2          50.4                9.3 +/-    0.37      11.7 +/-    0.37  0.040 / 0.060
G09     207.5          79.0                8.6 +/-    0.67       8.7 +/-    0.67  0.110 / 0.220
G16     45.3           12.3               -0.7 +/-    1.37      -1.9 +/-    1.37  0.120 / 0.190
G23     153.5          46.0                9.0 +/-    1.23      12.0 +/-    1.23  0.030 / 0.060
G27     59.0           33.2                6.7 +/-    0.94      10.9 +/-    0.94  0.050 / 0.060
G28     234.0          26.5                9.1 +/-    1.95      17.2 +/-    1.95  0.240 / 0.350
G30     300.3          35.2                8.4 +/-    1.02      13.3 +/-    1.02  0.190 / 0.460