PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-14:42:40
G01     44.5           20.3               10.3 +/-    2.51      22.6 +/-    2.51  0.050 / 0.070
G06     176.5          32.8               12.2 +/-    1.93      20.2 +/-    1.93  0.050 / 0.100
G13     245.1          25.9                9.6 +/-    1.74      18.3 +/-    1.74  0.240 / 0.260
G15     278.6          14.0                8.2 +/-    1.26      20.8 +/-    1.26  0.180 / 0.200
G17     356.1          73.4               10.3 +/-    0.32      10.7 +/-    0.32  0.030 / 0.060
G19     265.3          67.7                9.5 +/-    0.80      10.1 +/-    0.80  0.040 / 0.050
G24     318.7          12.9                5.5 +/-   12.97      14.3 +/-   12.97  0.030 / 0.020
G28     64.1           49.4                9.9 +/-    1.13      12.6 +/-    1.13  0.020 / 0.030
G30     153.0          35.3               10.9 +/-    0.71      17.2 +/-    0.71  0.270 / 0.130