PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-20:42:40
G03     189.0          19.8               15.0 +/-    1.73      33.2 +/-    1.73  0.040 / 0.070
G07     289.3          36.6               12.4 +/-    1.81      19.1 +/-    1.81  0.040 / 0.090
G08     144.5          26.5               16.1 +/-    1.47      30.4 +/-    1.47  0.060 / 0.120
G09     320.2          60.8               12.7 +/-    0.76      14.3 +/-    0.76  0.060 / 0.130
G16     43.0           40.1               10.0 +/-    0.51      14.5 +/-    0.51  0.050 / 0.080
G23     113.9          78.4               11.5 +/-    0.69      11.7 +/-    0.69  0.050 / 0.080
G26     43.4           11.7                9.0 +/-    2.67      24.3 +/-    2.67  0.030 / 0.040
G27     99.4           33.4               13.6 +/-    0.70      22.3 +/-    0.70  0.020 / 0.030
G30     274.5          15.4               13.5 +/-    0.95      33.2 +/-    0.95  0.060 / 0.090