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               11.7 +/-    0.88      19.5 +/-    0.88  0.040 / 0.040
G07     131.1          33.8               13.6 +/-    1.06      22.1 +/-    1.06  0.030 / 0.040
G11     60.5           36.3               10.4 +/-    0.79      16.1 +/-    0.79  0.040 / 0.080
G13     286.3          38.3               11.2 +/-    1.18      16.8 +/-    1.18  0.040 / 0.080
G15     310.0          13.0               10.1 +/-    1.28      26.4 +/-    1.28  0.040 / 0.050
G17     218.9          60.7               15.0 +/-    1.04      16.9 +/-    1.04  0.040 / 0.060
G18     55.5           21.0                8.4 +/-    1.12      18.0 +/-    1.12  0.070 / 0.110
G19     217.1          33.1               15.4 +/-    2.26      25.3 +/-    2.26  0.090 / 0.110
G28     352.0          61.6               10.7 +/-    0.67      12.0 +/-    0.67  0.080 / 0.340
G30     122.2          69.4               13.4 +/-    1.07      14.2 +/-    1.07  0.090 / 0.260