PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-20:28:00
G02     294.3          81.0                9.7 +/-    0.66       9.8 +/-    0.66  0.030 / 0.040
G05     167.1          26.7               13.7 +/-    1.54      25.8 +/-    1.54  0.030 / 0.040
G06     40.6           45.5                9.1 +/-    1.07      12.2 +/-    1.07  0.040 / 0.060
G12     318.9          66.7                9.2 +/-    0.46       9.9 +/-    0.46  0.050 / 0.040
G17     80.0           16.2               10.9 +/-    1.42      26.3 +/-    1.42  0.110 / 0.150
G19     66.6           33.8                9.7 +/-    1.88      15.7 +/-    1.88  0.100 / 0.150
G24     233.2          27.4               12.8 +/-    1.47      23.8 +/-    1.47  0.100 / 0.150
G25     317.7          22.3                9.0 +/-    2.09      18.7 +/-    2.09  0.100 / 0.180