PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-21:27:50
G01     71.2           33.0               14.4 +/-    0.80      23.8 +/-    0.80  0.040 / 0.080
G07     137.3          31.8               17.0 +/-    1.51      28.7 +/-    1.51  0.040 / 0.080
G11     55.0           32.3               11.9 +/-    0.89      20.0 +/-    0.89  0.050 / 0.120
G13     275.3          37.4               16.1 +/-    0.73      24.5 +/-    0.73  0.060 / 0.100
G15     302.8          15.3                8.8 +/-    3.59      21.6 +/-    3.59  0.030 / 0.050
G17     231.2          63.5               16.6 +/-    0.69      18.4 +/-    0.69  0.030 / 0.060
G18     49.7           18.7               10.9 +/-    0.75      24.8 +/-    0.75  0.040 / 0.100
G19     224.0          40.9               18.4 +/-    1.69      26.4 +/-    1.69  0.050 / 0.090
G28     19.8           59.2               13.6 +/-    0.54      15.5 +/-    0.54  0.060 / 0.150
G30     135.1          60.2               17.9 +/-    0.71      20.2 +/-    0.71  0.050 / 0.140