PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-21:13:00
G02     20.3           65.0                9.2 +/-    0.44      10.0 +/-    0.44  0.040 / 0.030
G05     152.3          52.4               13.3 +/-    0.36      16.3 +/-    0.36  0.030 / 0.030
G06     48.8           22.7                7.0 +/-    1.27      14.3 +/-    1.27  0.050 / 0.040
G12     213.1          77.2               10.5 +/-    0.31      10.8 +/-    0.31  0.050 / 0.040
G19     90.2           18.4                8.7 +/-    1.27      19.9 +/-    1.27  0.130 / 0.110
G25     309.0          45.6               10.1 +/-    1.33      13.5 +/-    1.33  0.080 / 0.120
G29     299.2          19.3               10.1 +/-    0.93      22.7 +/-    0.93  0.060 / 0.070