PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-23:12:40
G01     38.5           11.7               10.3 +/-    3.25      27.7 +/-    3.25  0.490 / 0.140
G02     199.1          15.1               19.5 +/-    2.04      48.2 +/-    2.04  0.380 / 0.230
G06     173.3          46.2               13.9 +/-    0.76      18.4 +/-    0.76  0.090 / 0.090
G13     232.9          17.8               14.2 +/-    2.43      32.9 +/-    2.43  0.090 / 0.050
G17     2.3            68.5               11.2 +/-    0.41      11.9 +/-    0.41  0.040 / 0.020
G19     295.9          70.7               10.3 +/-    0.69      10.9 +/-    0.69  0.050 / 0.030
G24     314.1          24.2               10.0 +/-    1.59      20.0 +/-    1.59  0.140 / 0.080
G28     80.1           43.3               11.2 +/-    1.11      15.5 +/-    1.11  0.170 / 0.130
G30     155.5          19.7               16.2 +/-    2.68      36.0 +/-    2.68  0.050 / 0.060