PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/27-11:12:30
G08     299.2          20.7                4.4 +/-    1.84       9.5 +/-    1.84  0.050 / 0.080
G10     2.9            62.9                3.7 +/-    0.43       4.1 +/-    0.43  0.060 / 0.100
G14     228.3          42.1                8.0 +/-    1.44      11.2 +/-    1.44  0.080 / 0.460
G20     91.7           10.4                2.7 +/-    3.04       7.5 +/-    3.04  0.080 / 0.410
G21     145.4          41.2                5.8 +/-    0.97       8.2 +/-    0.97  0.050 / 0.080
G24     57.9           26.6                3.7 +/-    1.01       7.0 +/-    1.01  0.040 / 0.080
G27     255.3          32.3                6.7 +/-    1.88      11.2 +/-    1.88  0.080 / 0.250
G32     244.0          67.8                6.2 +/-    0.76       6.6 +/-    0.76  0.090 / 0.220