PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-22:12:50
G01     44.6           20.7               10.0 +/-    0.90      21.7 +/-    0.90  0.070 / 0.190
G06     176.0          33.1               18.7 +/-    1.32      30.7 +/-    1.32  0.080 / 0.180
G13     243.3          25.9               19.5 +/-    3.07      37.4 +/-    3.07  0.060 / 0.150
G15     276.4          14.1               14.6 +/-    1.11      37.1 +/-    1.11  0.060 / 0.160
G17     327.7          75.8               15.2 +/-    0.62      15.7 +/-    0.62  0.120 / 0.350
G19     260.7          64.8               14.0 +/-    0.94      15.3 +/-    0.94  0.130 / 0.350
G24     318.1          14.3                9.1 +/-    1.90      23.1 +/-    1.90  0.040 / 0.070
G28     64.0           49.4               13.1 +/-    0.59      16.6 +/-    0.59  0.040 / 0.060
G30     152.3          32.0               17.9 +/-    1.69      30.0 +/-    1.69  0.080 / 0.120