PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-14:42:50
G02     201.3          17.2               10.7 +/-    2.67      25.2 +/-    2.67  0.100 / 0.190
G06     168.1          54.7                9.9 +/-    1.37      11.8 +/-    1.37  0.100 / 0.200
G13     227.5          13.7               11.0 +/-    2.76      28.2 +/-    2.76  0.070 / 0.120
G17     23.1           59.3                8.7 +/-    0.41      10.0 +/-    0.41  0.090 / 0.090
G19     307.5          70.1                8.1 +/-    0.38       8.6 +/-    0.38  0.170 / 0.470
G24     309.6          30.5                7.2 +/-    0.85      12.5 +/-    0.85  0.190 / 0.520
G28     86.6           40.4                8.8 +/-    0.43      12.7 +/-    0.43  0.030 / 0.030
G30     157.6          17.0               10.1 +/-    1.89      24.0 +/-    1.89  0.040 / 0.040