PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-21:43:10
G01     43.8           19.9                9.7 +/-    2.58      21.3 +/-    2.58  0.220 / 0.290
G06     177.9          30.7               12.6 +/-    1.36      21.7 +/-    1.36  0.350 / 0.230
G13     241.5          26.0               11.4 +/-    1.64      21.8 +/-    1.64  0.040 / 0.050
G15     275.0          14.0                8.4 +/-    0.90      21.5 +/-    0.90  0.040 / 0.050
G17     351.4          74.2               11.4 +/-    0.49      11.8 +/-    0.49  0.080 / 0.240
G19     262.2          66.2               11.9 +/-    0.58      12.9 +/-    0.58  0.120 / 0.210
G24     317.5          15.8                7.7 +/-    2.65      18.9 +/-    2.65  0.040 / 0.040
G28     59.1           52.4                9.9 +/-    0.84      12.1 +/-    0.84  0.050 / 0.030
G30     152.6          31.7               11.1 +/-    1.03      18.8 +/-    1.03  0.060 / 0.090