PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-22:42:30
G01     43.1           19.0               10.7 +/-    2.95      24.0 +/-    2.95  0.130 / 0.220
G06     175.6          35.6               18.3 +/-    1.10      28.8 +/-    1.10  0.110 / 0.280
G13     241.1          24.3               16.8 +/-    0.72      33.4 +/-    0.72  0.160 / 0.230
G15     274.0          13.4               13.2 +/-    1.14      34.1 +/-    1.14  0.150 / 0.330
G19     266.6          66.5               14.8 +/-    0.72      16.0 +/-    0.72  0.060 / 0.090
G24     317.6          16.3               11.4 +/-    3.75      27.6 +/-    3.75  0.070 / 0.100
G28     67.4           48.2               12.1 +/-    1.39      15.6 +/-    1.39  0.300 / 0.400
G30     153.1          29.4               16.8 +/-    2.23      29.9 +/-    2.23  0.180 / 0.270