PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-22:42:30
G10     251.3          27.4               13.4 +/-    1.97      24.9 +/-    1.97  0.030 / 0.040
G13     52.7           29.3                9.6 +/-    1.97      17.1 +/-    1.97  0.040 / 0.040
G15     90.6           59.2               10.7 +/-    0.56      12.2 +/-    0.56  0.110 / 0.290
G16     293.2          16.0               10.0 +/-    1.16      24.3 +/-    1.16  0.110 / 0.270
G20     255.4          21.8               14.6 +/-    3.05      30.8 +/-    3.05  0.100 / 0.120
G21     333.2          60.0                9.8 +/-    0.56      11.1 +/-    0.56  0.070 / 0.140
G26     265.4          15.4               11.7 +/-    1.13      28.8 +/-    1.13  0.030 / 0.040
G29     165.5          50.3               12.2 +/-    0.44      15.4 +/-    0.44  0.030 / 0.040