PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-23:28:10
G10     245.6          22.4               11.1 +/-    2.24      22.9 +/-    2.24  0.140 / 0.570
G13     59.5           32.8                7.6 +/-    0.68      12.6 +/-    0.68  0.120 / 0.560
G15     104.4          58.5                9.6 +/-    0.66      11.0 +/-    0.66  0.100 / 0.280
G16     300.2          16.0                6.0 +/-    2.82      14.7 +/-    2.82  0.130 / 0.270
G20     252.5          24.9                8.0 +/-    0.70      15.6 +/-    0.70  0.030 / 0.070
G21     325.6          55.2                8.2 +/-    0.69       9.7 +/-    0.69  0.040 / 0.060
G26     272.1          18.0                8.6 +/-    1.99      19.9 +/-    1.99  0.030 / 0.040
G29     163.4          58.1                9.5 +/-    0.84      11.0 +/-    0.84  0.030 / 0.050