PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-20:12:50
G01     59.2           30.3               11.9 +/-    1.82      20.6 +/-    1.82  0.180 / 0.340
G07     142.8          21.9               15.9 +/-    1.38      33.4 +/-    1.38  0.190 / 0.330
G11     48.3           23.8               10.8 +/-    1.70      21.7 +/-    1.70  0.040 / 0.050
G13     261.7          34.9               14.7 +/-    2.78      23.4 +/-    2.78  0.040 / 0.050
G15     293.4          16.2               14.3 +/-    1.48      34.5 +/-    1.48  0.090 / 0.140
G17     255.8          73.8               14.8 +/-    0.34      15.4 +/-    0.34  0.060 / 0.120
G18     42.0           12.6                9.8 +/-    1.82      25.7 +/-    1.82  0.240 / 0.280
G19     233.5          50.1               15.2 +/-    2.00      19.2 +/-    2.00  0.180 / 0.200
G28     37.7           56.3               12.8 +/-    0.85      15.0 +/-    0.85  0.050 / 0.050
G30     144.1          50.4               15.3 +/-    0.65      19.2 +/-    0.65  0.050 / 0.050