PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-18:42:50
G01     111.1          22.6               25.8 +/-    1.32      53.2 +/-    1.32  0.030 / 0.050
G07     104.2          55.4               12.6 +/-    0.79      15.0 +/-    0.79  0.030 / 0.040
G08     42.4           23.8                9.5 +/-    0.94      19.1 +/-    0.94  0.050 / 0.060
G09     176.4          19.3               16.0 +/-    1.20      35.9 +/-    1.20  0.040 / 0.060
G11     93.8           42.7               14.2 +/-    0.70      19.8 +/-    0.70  0.030 / 0.030
G13     312.6          26.4               10.7 +/-    2.21      20.3 +/-    2.21  0.030 / 0.040
G17     203.2          33.3               15.7 +/-    1.01      25.7 +/-    1.01  0.090 / 0.270
G18     83.2           23.0               10.5 +/-    0.61      21.5 +/-    0.61  0.090 / 0.230
G28     300.2          57.7               12.3 +/-    0.43      14.2 +/-    0.43  0.090 / 0.220
G30     12.8           76.1               14.5 +/-    0.46      14.9 +/-    0.46  0.090 / 0.210