PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-21:27:40
G01     50.4           25.7               11.1 +/-    2.08      21.4 +/-    2.08  0.090 / 0.150
G06     179.6          21.5               17.9 +/-    1.85      38.0 +/-    1.85  0.120 / 0.170
G11     44.4           15.0                9.4 +/-    2.16      23.5 +/-    2.16  0.040 / 0.040
G13     250.5          31.4               13.5 +/-    1.20      23.0 +/-    1.20  0.040 / 0.040
G15     283.7          16.0               12.4 +/-    1.48      30.1 +/-    1.48  0.040 / 0.050
G17     313.9          79.2               13.0 +/-    0.48      13.2 +/-    0.48  0.040 / 0.040
G19     244.5          59.4               14.5 +/-    1.12      16.5 +/-    1.12  0.050 / 0.070
G28     44.9           55.8               11.8 +/-    1.21      14.0 +/-    1.21  0.050 / 0.070
G30     149.0          40.9               14.3 +/-    1.59      20.5 +/-    1.59  0.070 / 0.140