PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-03:57:40
G02     60.0           31.7                4.2 +/-    0.72       7.1 +/-    0.72  0.050 / 0.100
G05     57.7           60.0                5.4 +/-    0.64       6.1 +/-    0.64  0.090 / 0.090
G12     185.2          33.4                6.7 +/-    0.77      10.9 +/-    0.77  0.030 / 0.040
G13     129.0          14.8                7.4 +/-    1.80      18.4 +/-    1.80  0.030 / 0.030
G15     163.6          12.0                5.2 +/-    2.01      13.8 +/-    2.01  0.060 / 0.060
G20     216.5          27.3                6.2 +/-    0.92      11.5 +/-    0.92  0.040 / 0.070
G21     270.8          17.0                6.9 +/-    1.56      16.3 +/-    1.56  0.070 / 0.210
G25     239.1          52.4                6.6 +/-    1.04       8.1 +/-    1.04  0.100 / 0.170
G29     327.7          53.7                4.6 +/-    0.73       5.5 +/-    0.73  0.050 / 0.110