PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-20:12:50
G01     57.9           29.5               12.1 +/-    1.54      21.4 +/-    1.54  0.060 / 0.060
G07     142.1          14.7               14.2 +/-    2.81      35.6 +/-    2.81  0.050 / 0.050
G11     46.9           21.7               10.7 +/-    3.04      22.6 +/-    3.04  0.090 / 0.390
G13     259.5          35.3               17.6 +/-    1.38      27.8 +/-    1.38  0.100 / 0.460
G15     291.4          16.6               11.8 +/-    1.74      28.2 +/-    1.74  0.050 / 0.040
G17     266.2          77.9               17.4 +/-    0.71      17.8 +/-    0.71  0.040 / 0.040
G18     39.9           10.4                8.7 +/-    2.70      24.0 +/-    2.70  0.150 / 0.400
G19     233.7          52.6               17.9 +/-    2.07      21.9 +/-    2.07  0.170 / 0.370
G28     30.8           58.4               12.4 +/-    0.52      14.3 +/-    0.52  0.090 / 0.130
G30     144.5          48.6               15.8 +/-    0.79      20.3 +/-    0.79  0.080 / 0.120