PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-21:42:40
G01     45.3           21.5                9.6 +/-    3.39      20.4 +/-    3.39  0.200 / 0.270
G06     178.4          28.3               16.3 +/-    2.34      29.7 +/-    2.34  0.200 / 0.270
G13     243.7          27.5               14.8 +/-    1.73      27.4 +/-    1.73  0.080 / 0.180
G15     277.2          14.6               11.8 +/-    1.22      29.7 +/-    1.22  0.090 / 0.250
G17     344.4          75.8               12.8 +/-    0.41      13.1 +/-    0.41  0.040 / 0.030
G19     257.0          64.7               14.5 +/-    0.86      15.9 +/-    0.86  0.040 / 0.030
G24     318.0          13.9                9.4 +/-    2.23      24.1 +/-    2.23  0.030 / 0.060
G28     55.6           53.3               11.5 +/-    0.63      13.9 +/-    0.63  0.030 / 0.060
G30     151.8          34.0               14.6 +/-    1.36      23.6 +/-    1.36  0.060 / 0.090