PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-20:57:50
G01     45.2           21.4               21.6 +/-    3.06      45.9 +/-    3.06  0.030 / 0.060
G06     178.0          28.7               17.0 +/-    1.23      30.5 +/-    1.23  0.030 / 0.050
G13     243.6          27.5               14.7 +/-    1.74      27.3 +/-    1.74  0.140 / 0.390
G15     277.1          14.6               11.7 +/-    1.78      29.3 +/-    1.78  0.160 / 0.370
G17     343.0          76.0               13.3 +/-    0.65      13.7 +/-    0.65  0.070 / 0.100
G19     257.2          64.8               14.4 +/-    0.80      15.7 +/-    0.80  0.070 / 0.110
G24     318.0          13.7                9.4 +/-    1.73      24.2 +/-    1.73  0.080 / 0.140
G28     55.4           53.5               11.8 +/-    1.06      14.2 +/-    1.06  0.080 / 0.160
G30     151.7          33.6               16.1 +/-    1.03      26.2 +/-    1.03  0.100 / 0.140