PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-20:57:40
G01     50.9           26.0                9.9 +/-    2.59      18.9 +/-    2.59  0.030 / 0.050
G06     179.5          21.2               16.1 +/-    2.75      34.4 +/-    2.75  0.030 / 0.050
G11     44.5           15.6                8.9 +/-    2.90      21.7 +/-    2.90  0.050 / 0.050
G13     251.1          31.8               10.8 +/-    1.67      18.3 +/-    1.67  0.090 / 0.070
G15     284.2          16.1               10.8 +/-    1.00      26.1 +/-    1.00  0.080 / 0.140
G17     309.2          79.3               12.3 +/-    0.70      12.5 +/-    0.70  0.070 / 0.150
G19     243.6          59.0               12.9 +/-    1.36      14.8 +/-    1.36  0.110 / 0.200
G28     43.7           56.1               10.5 +/-    0.95      12.3 +/-    0.95  0.130 / 0.180
G30     148.6          41.3               13.6 +/-    1.43      19.4 +/-    1.43  0.150 / 0.130