PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-23:12:30
G07     37.2           69.7               10.0 +/-    0.94      10.6 +/-    0.94  0.040 / 0.080
G08     56.1           45.3                8.2 +/-    0.73      11.1 +/-    0.73  0.050 / 0.090
G09     179.7          42.1               10.0 +/-    1.61      14.1 +/-    1.61  0.170 / 0.330
G11     126.4          31.7               10.6 +/-    1.47      17.9 +/-    1.47  0.080 / 0.290
G23     160.0          10.7               10.4 +/-    5.18      28.5 +/-    5.18  0.020 / 0.040
G27     37.8           10.2                8.7 +/-    1.95      24.1 +/-    1.95  0.030 / 0.030
G28     270.1          50.8                9.0 +/-    0.85      11.3 +/-    0.85  0.070 / 0.130
G30     333.3          60.1                9.3 +/-    1.00      10.6 +/-    1.00  0.070 / 0.120