PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-01:12:30
G02     318.5          81.5                8.7 +/-    0.69       8.8 +/-    0.69  0.050 / 0.070
G05     165.6          28.6               13.1 +/-    1.05      23.6 +/-    1.05  0.050 / 0.040
G06     40.4           45.7                7.9 +/-    1.04      10.5 +/-    1.04  0.030 / 0.030
G12     318.0          65.0                9.9 +/-    0.37      10.8 +/-    0.37  0.030 / 0.070
G17     79.6           18.4                9.9 +/-    2.00      22.5 +/-    2.00  0.060 / 0.080
G19     68.9           31.8                9.0 +/-    1.29      15.3 +/-    1.29  0.100 / 0.100
G24     233.3          26.9               12.2 +/-    1.42      22.8 +/-    1.42  0.080 / 0.190
G25     317.8          22.6                9.2 +/-    2.14      19.0 +/-    2.14  0.110 / 0.140