PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-19:27:40
G01     82.0           32.7               12.0 +/-    0.77      19.8 +/-    0.77  0.030 / 0.030
G07     131.1          33.4               15.2 +/-    1.05      25.0 +/-    1.05  0.030 / 0.030
G11     60.5           36.4               12.9 +/-    1.26      20.0 +/-    1.26  0.050 / 0.080
G13     286.2          38.3               16.9 +/-    1.68      25.2 +/-    1.68  0.050 / 0.090
G15     310.0          13.0                9.8 +/-    1.93      25.7 +/-    1.93  0.030 / 0.040
G17     218.9          60.3               16.8 +/-    1.44      19.0 +/-    1.44  0.040 / 0.040
G18     55.6           21.1               11.8 +/-    2.96      25.3 +/-    2.96  0.140 / 0.240
G19     217.1          33.3               17.1 +/-    1.33      28.0 +/-    1.33  0.110 / 0.160
G28     351.6          61.6               12.0 +/-    0.71      13.5 +/-    0.71  0.050 / 0.100
G30     122.5          69.0               14.2 +/-    0.53      15.1 +/-    0.53  0.060 / 0.100