PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-01:57:40
G01     116.7          19.7                8.5 +/-    1.42      18.9 +/-    1.42  0.050 / 0.050
G07     86.9           65.1                6.1 +/-    0.73       6.7 +/-    0.73  0.050 / 0.060
G08     44.3           30.2                3.8 +/-    1.49       6.6 +/-    1.49  0.040 / 0.070
G09     177.3          24.2                7.5 +/-    0.75      15.0 +/-    0.75  0.070 / 0.120
G11     105.6          40.7                7.2 +/-    0.73      10.4 +/-    0.73  0.070 / 0.120
G13     316.9          20.6                2.7 +/-    1.88       6.0 +/-    1.88  0.100 / 0.100
G17     202.6          27.0                5.2 +/-    2.36       9.7 +/-    2.36  0.030 / 0.030
G28     299.1          58.7                5.0 +/-    0.92       5.8 +/-    0.92  0.040 / 0.030
G30     2.0            72.7                5.2 +/-    0.66       5.4 +/-    0.66  0.150 / 0.150