PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-18:43:10
G01     127.5          11.3               13.9 +/-    5.93      37.7 +/-    5.93  0.040 / 0.050
G07     49.5           69.8               10.0 +/-    0.43      10.5 +/-    0.43  0.030 / 0.040
G08     52.8           43.0                8.2 +/-    1.27      11.4 +/-    1.27  0.250 / 0.360
G09     178.6          37.1               11.9 +/-    0.82      18.1 +/-    0.82  0.390 / 0.330
G11     120.6          34.6               12.2 +/-    1.48      19.5 +/-    1.48  0.130 / 0.240
G13     321.4          10.9               -5.3 +/-   19.16     -14.4 +/-   19.16  0.160 / 0.240
G17     201.2          10.9               -7.1 +/-   16.37     -19.3 +/-   16.37  0.030 / 0.030
G18     104.8          16.3               11.6 +/-    2.39      28.0 +/-    2.39  0.030 / 0.030
G28     275.8          52.8               10.6 +/-    3.50      12.9 +/-    3.50  0.030 / 0.030
G30     334.3          61.2                8.2 +/-    0.47       9.2 +/-    0.47  0.030 / 0.030