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                9.8 +/-    0.84       9.9 +/-    0.84  0.030 / 0.050
G05     165.6          28.6               15.0 +/-    0.44      27.1 +/-    0.44  0.040 / 0.040
G06     40.4           45.7                8.1 +/-    0.40      10.8 +/-    0.40  0.050 / 0.110
G12     318.0          65.0                9.3 +/-    1.03      10.1 +/-    1.03  0.050 / 0.110
G17     79.6           18.4               10.1 +/-    0.81      23.2 +/-    0.81  0.090 / 0.170
G19     68.9           31.8               11.3 +/-    0.88      19.1 +/-    0.88  0.110 / 0.130
G24     233.3          26.9               14.0 +/-    2.23      26.3 +/-    2.23  0.040 / 0.040
G25     317.8          22.6                8.4 +/-    1.43      17.5 +/-    1.43  0.030 / 0.040