PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-17:57:40
G02     226.2          67.6               10.4 +/-    0.95      11.2 +/-    0.95  0.060 / 0.060
G06     44.3           66.0                9.0 +/-    0.53       9.7 +/-    0.53  0.050 / 0.070
G12     320.0          42.8                9.1 +/-    0.49      12.7 +/-    0.49  0.160 / 0.340
G17     62.6           29.2                8.1 +/-    1.58      14.4 +/-    1.58  0.220 / 0.400
G19     49.9           42.3                8.9 +/-    1.04      12.5 +/-    1.04  0.040 / 0.060
G24     254.5          38.4               10.3 +/-    1.39      15.4 +/-    1.39  0.050 / 0.050
G28     126.7          12.3               10.2 +/-    1.95      27.1 +/-    1.95  0.060 / 0.110