PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-13:57:40
G02     215.2          53.7               10.3 +/-    0.63      12.4 +/-    0.63  0.050 / 0.070
G06     62.9           75.4                8.8 +/-    1.05       9.1 +/-    1.05  0.050 / 0.080
G12     318.6          36.9                5.3 +/-    1.12       8.2 +/-    1.12  0.050 / 0.060
G17     56.4           32.4                6.2 +/-    0.36      10.4 +/-    0.36  0.050 / 0.070
G19     30.6           54.1                7.5 +/-    0.44       9.1 +/-    0.44  0.030 / 0.020
G24     265.0          42.6                6.7 +/-    0.67       9.3 +/-    0.67  0.030 / 0.030
G28     120.7          16.2                7.4 +/-    1.41      18.0 +/-    1.41  0.040 / 0.050