PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-06:57:40
G02     218.8          66.0                4.6 +/-    0.53       5.0 +/-    0.53  0.340 / 0.450
G06     53.6           75.5                4.4 +/-    0.47       4.5 +/-    0.47  0.240 / 0.380
G12     319.3          37.8                1.5 +/-    1.01       2.2 +/-    1.01  0.050 / 0.070
G17     60.5           30.3                1.7 +/-    1.92       3.0 +/-    1.92  0.040 / 0.060
G19     44.6           46.1                2.3 +/-    1.03       3.0 +/-    1.03  0.040 / 0.070
G24     262.0          40.5                3.9 +/-    4.07       5.7 +/-    4.07  0.070 / 0.070
G28     125.4          10.2                6.2 +/-    2.25      17.3 +/-    2.25  0.060 / 0.070