PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-04:28:00
G10     241.6          18.3               12.9 +/-    2.67      29.6 +/-    2.67  0.080 / 0.250
G13     65.8           35.1                8.8 +/-    1.04      14.0 +/-    1.04  0.100 / 0.320
G15     109.9          56.4                8.6 +/-    0.33      10.1 +/-    0.33  0.040 / 0.050
G16     306.1          14.9                7.7 +/-    2.27      19.3 +/-    2.27  0.050 / 0.050
G20     271.4          62.4               10.1 +/-    0.51      11.2 +/-    0.51  0.070 / 0.090
G21     320.6          52.1                8.1 +/-    0.65      10.0 +/-    0.65  0.070 / 0.080
G26     277.7          19.4                9.4 +/-    1.93      21.1 +/-    1.93  0.040 / 0.040
G29     161.1          63.6                7.9 +/-    0.36       8.7 +/-    0.36  0.050 / 0.050