PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-08:43:10
G03     209.3          53.2                6.8 +/-    0.75       8.3 +/-    0.75  0.090 / 0.080
G07     261.6          18.9                5.3 +/-    2.09      11.9 +/-    2.09  0.080 / 0.110
G09     313.9          35.2                4.9 +/-    0.85       7.7 +/-    0.85  0.050 / 0.160
G16     75.6           61.8                5.3 +/-    0.49       5.9 +/-    0.49  0.060 / 0.140
G22     186.9          35.8                5.6 +/-    1.41       8.8 +/-    1.41  0.170 / 0.240
G23     336.4          65.3                4.8 +/-    0.68       5.3 +/-    0.68  0.160 / 0.240
G26     48.4           36.6                3.7 +/-    1.03       5.7 +/-    1.03  0.040 / 0.040
G27     130.0          14.4                4.3 +/-    3.07      10.8 +/-    3.07  0.030 / 0.040