PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-20:12:50
G01     82.1           32.7               10.6 +/-    0.91      17.6 +/-    0.91  0.060 / 0.090
G07     131.1          33.8               13.3 +/-    0.75      21.5 +/-    0.75  0.060 / 0.080
G11     60.5           36.3               11.4 +/-    1.05      17.7 +/-    1.05  0.060 / 0.120
G13     286.3          38.3               16.9 +/-    0.69      25.3 +/-    0.69  0.070 / 0.110
G15     310.0          13.0               10.7 +/-    2.81      27.8 +/-    2.81  0.130 / 0.140
G17     218.9          60.7               15.0 +/-    1.30      17.0 +/-    1.30  0.120 / 0.110
G18     55.5           21.0               11.2 +/-    3.29      24.1 +/-    3.29  0.040 / 0.050
G19     217.1          33.1               14.8 +/-    1.48      24.4 +/-    1.48  0.040 / 0.050
G28     352.0          61.6               12.0 +/-    0.77      13.4 +/-    0.77  0.040 / 0.030
G30     122.2          69.4               13.9 +/-    0.62      14.7 +/-    0.62  0.030 / 0.030