PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-18:13:10
G02     241.5          74.3                9.6 +/-    0.53       9.9 +/-    0.53  0.140 / 0.260
G05     171.7          16.6               11.8 +/-    1.53      28.1 +/-    1.53  0.170 / 0.320
G06     40.8           55.6                8.9 +/-    0.63      10.5 +/-    0.63  0.080 / 0.100
G12     322.7          56.8                8.7 +/-    0.44      10.1 +/-    0.44  0.140 / 0.150
G17     71.9           21.3                7.3 +/-    1.99      15.6 +/-    1.99  0.030 / 0.030
G19     55.3           40.8                7.5 +/-    1.42      10.8 +/-    1.42  0.030 / 0.040
G24     242.7          34.2               12.7 +/-    2.54      20.5 +/-    2.54  0.030 / 0.040
G25     316.8          13.4                7.5 +/-    3.40      19.3 +/-    3.40  0.040 / 0.030