PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-21:28:00
G01     60.5           30.7               12.8 +/-    1.10      22.2 +/-    1.10  0.110 / 0.300
G07     142.2          23.1               14.9 +/-    2.16      30.4 +/-    2.16  0.110 / 0.300
G11     49.1           25.3               11.7 +/-    1.28      22.8 +/-    1.28  0.060 / 0.100
G13     263.3          35.3               13.7 +/-    1.01      21.5 +/-    1.01  0.060 / 0.110
G15     294.2          16.4                9.7 +/-    1.56      23.4 +/-    1.56  0.080 / 0.250
G17     250.4          71.9               14.7 +/-    0.81      15.3 +/-    0.81  0.080 / 0.220
G18     42.9           13.5                9.4 +/-    0.91      24.4 +/-    0.91  0.040 / 0.050
G19     232.3          49.4               17.6 +/-    1.71      22.3 +/-    1.71  0.040 / 0.060
G28     35.8           56.6               11.9 +/-    0.48      14.0 +/-    0.48  0.070 / 0.170
G30     143.1          51.0               14.3 +/-    0.91      17.8 +/-    0.91  0.090 / 0.180