PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-23:57:50
G10     248.7          25.2               11.5 +/-    1.94      22.3 +/-    1.94  0.040 / 0.040
G13     55.6           31.0                6.8 +/-    1.11      11.7 +/-    1.11  0.040 / 0.040
G15     95.8           58.9                8.1 +/-    0.51       9.3 +/-    0.51  0.130 / 0.320
G16     296.4          16.0                7.1 +/-    2.02      17.3 +/-    2.02  0.160 / 0.290
G20     256.6          30.2                9.7 +/-    3.89      16.9 +/-    3.89  0.080 / 0.110
G21     329.8          57.9                7.8 +/-    0.90       9.0 +/-    0.90  0.090 / 0.130
G26     268.4          16.6               10.1 +/-    1.28      24.1 +/-    1.28  0.040 / 0.040
G29     164.6          53.7                8.0 +/-    0.89       9.6 +/-    0.89  0.030 / 0.040