PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-19:12:50
G01     105.0          26.0               12.5 +/-    1.39      23.9 +/-    1.39  0.030 / 0.040
G07     112.4          50.8               13.3 +/-    0.96      16.6 +/-    0.96  0.030 / 0.050
G08     41.6           18.4                9.4 +/-    2.02      21.4 +/-    2.02  0.100 / 0.070
G09     175.2          13.6               13.0 +/-    3.02      33.6 +/-    3.02  0.090 / 0.060
G11     85.0           42.9               12.0 +/-    0.63      16.7 +/-    0.63  0.050 / 0.030
G13     308.0          30.4               11.3 +/-    0.93      19.7 +/-    0.93  0.050 / 0.030
G17     205.5          39.9               13.8 +/-    1.21      20.1 +/-    1.21  0.090 / 0.150
G18     76.4           23.9               10.1 +/-    1.06      20.3 +/-    1.06  0.090 / 0.170
G28     311.9          59.6               11.1 +/-    0.82      12.6 +/-    0.82  0.060 / 0.170
G30     40.2           78.9               12.6 +/-    1.17      12.8 +/-    1.17  0.070 / 0.170