PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-21:27:50
G01     57.4           29.3               11.7 +/-    1.81      20.8 +/-    1.81  0.090 / 0.090
G07     142.4          14.9               15.5 +/-    4.10      38.8 +/-    4.10  0.140 / 0.080
G11     46.6           21.1               10.5 +/-    3.02      22.6 +/-    3.02  0.120 / 0.430
G13     258.9          35.0               15.9 +/-    1.06      25.3 +/-    1.06  0.100 / 0.390
G15     290.9          16.6               11.6 +/-    1.30      27.7 +/-    1.30  0.050 / 0.050
G17     271.3          78.7               14.8 +/-    0.54      15.0 +/-    0.54  0.040 / 0.060
G18     39.4           9.7                 9.6 +/-    2.37      26.9 +/-    2.37  0.070 / 0.100
G19     234.4          52.9               15.2 +/-    1.90      18.5 +/-    1.90  0.070 / 0.110
G28     32.4           58.1               11.6 +/-    0.61      13.4 +/-    0.61  0.060 / 0.060
G30     145.0          48.7               15.3 +/-    0.62      19.7 +/-    0.62  0.040 / 0.060