PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-15:57:50
G01     45.3           21.5                8.2 +/-    0.93      17.4 +/-    0.93  0.060 / 0.090
G06     174.9          33.1               12.4 +/-    1.36      20.4 +/-    1.36  0.070 / 0.090
G13     243.9          26.7               12.3 +/-    1.91      23.1 +/-    1.91  0.100 / 0.170
G15     280.3          13.8                8.6 +/-    1.34      22.1 +/-    1.34  0.090 / 0.170
G17     343.2          75.5               11.0 +/-    0.90      11.3 +/-    0.90  0.040 / 0.070
G19     255.5          61.9               10.7 +/-    1.05      11.9 +/-    1.05  0.040 / 0.070
G24     318.0          14.5                7.7 +/-    2.29      19.4 +/-    2.29  0.140 / 0.340
G28     61.6           50.3               10.8 +/-    0.66      13.5 +/-    0.66  0.130 / 0.410
G30     152.7          35.8               11.6 +/-    0.92      18.1 +/-    0.92  0.080 / 0.210