PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/04-07:12:30
G10     293.6          50.4                2.9 +/-    1.05       3.6 +/-    1.05  0.050 / 0.040
G15     46.5           30.0                1.2 +/-    1.66       2.0 +/-    1.66  0.060 / 0.030
G20     43.9           53.2                3.8 +/-    0.52       4.6 +/-    0.52  0.030 / 0.050
G21     87.2           75.6                3.6 +/-    0.48       3.7 +/-    0.48  0.030 / 0.070
G24     100.1          25.5                5.2 +/-    0.96      10.1 +/-    0.96  0.040 / 0.020
G27     302.5          33.4                3.5 +/-    1.50       5.8 +/-    1.50  0.040 / 0.020
G29     168.4          10.1                3.5 +/-    2.48       9.9 +/-    2.48  0.070 / 0.030
G32     209.4          31.2                2.6 +/-    1.84       4.5 +/-    1.84  0.060 / 0.040