PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/03-21:57:40
G01     38.7           12.1                9.4 +/-    1.91      25.1 +/-    1.91  0.060 / 0.350
G02     199.3          14.2               21.6 +/-    2.11      54.8 +/-    2.11  0.070 / 0.310
G06     173.0          45.9               17.2 +/-    1.18      22.9 +/-    1.18  0.120 / 0.200
G13     233.3          18.2               19.1 +/-    2.43      43.9 +/-    2.43  0.190 / 0.220
G15     266.0          10.2               14.8 +/-    2.02      41.1 +/-    2.02  0.120 / 0.220
G17     3.0            68.4               14.9 +/-    0.72      15.9 +/-    0.72  0.100 / 0.210
G19     292.7          70.3               13.9 +/-    0.70      14.6 +/-    0.70  0.130 / 0.410
G24     314.3          23.9               10.3 +/-    3.58      20.7 +/-    3.58  0.140 / 0.300
G28     79.2           43.7               13.4 +/-    0.82      18.4 +/-    0.82  0.040 / 0.060
G30     155.6          20.8               17.0 +/-    4.17      36.6 +/-    4.17  0.040 / 0.090