PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-17:42:40
G03     189.0          19.8               12.0 +/-    1.21      26.6 +/-    1.21  0.100 / 0.170
G07     289.1          36.5               12.1 +/-    1.57      18.8 +/-    1.57  0.120 / 0.150
G08     146.9          25.5               14.1 +/-    1.69      27.2 +/-    1.69  0.050 / 0.080
G09     320.3          61.1               10.6 +/-    1.07      11.9 +/-    1.07  0.070 / 0.090
G16     42.9           38.7                9.6 +/-    1.13      14.3 +/-    1.13  0.160 / 0.340
G23     117.1          76.1               11.1 +/-    0.86      11.4 +/-    0.86  0.190 / 0.220
G26     43.4           10.8                8.8 +/-    2.28      24.3 +/-    2.28  0.030 / 0.030
G27     99.7           33.4               11.0 +/-    1.43      18.0 +/-    1.43  0.020 / 0.030
G30     273.9          13.9               11.7 +/-    1.70      30.0 +/-    1.70  0.060 / 0.120