PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-18:27:30
G02     231.4          70.3                9.1 +/-    0.45       9.6 +/-    0.45  0.220 / 0.240
G05     173.4          12.6               11.8 +/-    4.28      31.1 +/-    4.28  0.260 / 0.280
G06     42.2           60.5                9.2 +/-    0.74      10.4 +/-    0.74  0.050 / 0.120
G12     322.4          51.7                8.1 +/-    0.66      10.1 +/-    0.66  0.080 / 0.130
G17     67.8           24.4               10.6 +/-    1.07      21.0 +/-    1.07  0.030 / 0.040
G19     50.3           43.7                9.5 +/-    2.00      13.0 +/-    2.00  0.030 / 0.050
G24     248.0          36.9                9.5 +/-    1.25      14.6 +/-    1.25  0.030 / 0.030