PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-18:42:50
G01     106.9          25.7               12.6 +/-    1.06      24.2 +/-    1.06  0.230 / 0.110
G07     106.9          58.6               14.3 +/-    0.86      16.4 +/-    0.86  0.110 / 0.190
G08     42.2           22.5                8.9 +/-    2.76      18.4 +/-    2.76  0.020 / 0.030
G09     175.0          13.7               14.3 +/-    1.43      36.7 +/-    1.43  0.030 / 0.040
G11     90.1           43.1               15.0 +/-    0.90      20.8 +/-    0.90  0.020 / 0.040
G13     309.6          28.6               11.0 +/-    0.97      19.9 +/-    0.97  0.030 / 0.050
G17     206.9          34.8               16.0 +/-    1.18      25.4 +/-    1.18  0.070 / 0.120
G18     80.6           24.4               12.6 +/-    1.63      24.9 +/-    1.63  0.070 / 0.140
G28     318.8          61.1               11.4 +/-    0.67      12.9 +/-    0.67  0.040 / 0.060
G30     29.6           78.3               13.5 +/-    1.28      13.7 +/-    1.28  0.040 / 0.050