PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-23:57:30
G02     205.1          42.9               14.3 +/-    0.93      19.8 +/-    0.93  0.180 / 0.310
G06     144.0          75.7               13.1 +/-    0.84      13.5 +/-    0.84  0.130 / 0.220
G12     311.1          20.4               10.7 +/-    0.81      23.4 +/-    0.81  0.110 / 0.150
G17     37.9           48.4                9.2 +/-    0.49      11.9 +/-    0.49  0.090 / 0.160
G19     12.8           61.5               10.4 +/-    1.08      11.7 +/-    1.08  0.060 / 0.090
G24     290.1          40.7               11.0 +/-    1.01      15.8 +/-    1.01  0.050 / 0.090
G28     109.0          26.3               14.0 +/-    1.19      26.6 +/-    1.19  0.040 / 0.060