PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-19:28:10
G01     73.7           33.2               14.7 +/-    0.37      24.1 +/-    0.37  0.080 / 0.220
G07     136.0          33.6               16.3 +/-    1.11      26.6 +/-    1.11  0.090 / 0.270
G11     56.0           33.1               11.7 +/-    0.75      19.2 +/-    0.75  0.030 / 0.040
G13     277.7          37.7               11.1 +/-    9.74      16.8 +/-    9.74  0.030 / 0.050
G15     305.1          14.5                7.7 +/-   11.47      19.4 +/-   11.47  0.030 / 0.070
G17     228.8          63.6               18.1 +/-    0.76      20.0 +/-    0.76  0.030 / 0.050
G18     51.3           19.6               11.2 +/-    1.38      24.9 +/-    1.38  0.040 / 0.080
G19     222.5          38.3               13.6 +/-    7.69      20.3 +/-    7.69  0.040 / 0.080
G28     15.7           59.8               13.2 +/-    0.56      15.0 +/-    0.56  0.050 / 0.150
G30     132.8          63.3               15.8 +/-    0.75      17.5 +/-    0.75  0.050 / 0.150