PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-17:13:00
G07     334.5          59.0               10.1 +/-    0.91      11.6 +/-    0.91  0.020 / 0.040
G08     106.7          49.7               12.2 +/-    0.74      15.4 +/-    0.74  0.030 / 0.040
G09     210.8          79.8               10.6 +/-    0.39      10.8 +/-    0.39  0.030 / 0.020
G11     148.0          10.8                6.8 +/-   22.66      18.7 +/-   22.66  0.030 / 0.020
G16     44.9           14.6                8.7 +/-    3.08      21.8 +/-    3.08  0.130 / 0.340
G23     153.5          47.7               12.1 +/-    0.72      15.7 +/-    0.72  0.150 / 0.230
G27     62.4           35.2               10.0 +/-    1.20      15.8 +/-    1.20  0.070 / 0.070
G28     232.1          21.0               11.4 +/-    2.33      24.6 +/-    2.33  0.070 / 0.080
G30     298.4          32.9                9.8 +/-    2.00      16.1 +/-    2.00  0.090 / 0.120