PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-15:28:00
G03     189.1          23.5               10.2 +/-    2.64      20.6 +/-    2.64  0.100 / 0.350
G07     288.5          39.7                9.9 +/-    1.05      14.5 +/-    1.05  0.090 / 0.620
G08     144.9          23.2               11.9 +/-    2.35      24.2 +/-    2.35  0.040 / 0.080
G09     320.4          55.6                8.3 +/-    1.94       9.8 +/-    1.94  0.040 / 0.090
G16     46.4           47.6                7.7 +/-    0.47      10.0 +/-    0.47  0.090 / 0.140
G23     77.8           82.9                9.6 +/-    0.58       9.7 +/-    0.58  0.080 / 0.130
G26     43.5           18.6                7.4 +/-    1.50      17.0 +/-    1.50  0.040 / 0.070
G27     108.4          30.7                9.6 +/-    0.93      16.5 +/-    0.93  0.040 / 0.070
G30     270.0          10.7               -5.2 +/-   33.21     -14.2 +/-   33.21  0.060 / 0.110