PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-17:43:00
G01     127.4          11.4                6.6 +/-   41.59      17.9 +/-   41.59  0.030 / 0.050
G07     50.1           69.8               14.2 +/-    0.47      15.0 +/-    0.47  0.040 / 0.050
G08     52.1           42.1               12.5 +/-    0.41      17.6 +/-    0.41  0.030 / 0.040
G09     178.4          36.7               16.6 +/-    1.30      25.5 +/-    1.30  0.030 / 0.040
G11     119.9          34.8               15.4 +/-    0.72      24.6 +/-    0.72  0.080 / 0.130
G13     321.3          11.1                1.9 +/-   26.73       5.1 +/-   26.73  0.070 / 0.130
G17     201.0          11.7               14.2 +/-   15.17      38.1 +/-   15.17  0.050 / 0.080
G18     104.6          16.4               13.5 +/-    1.42      32.4 +/-    1.42  0.060 / 0.080
G28     276.0          52.9               14.8 +/-    1.04      18.1 +/-    1.04  0.040 / 0.040
G30     333.8          60.9               14.1 +/-    1.04      15.9 +/-    1.04  0.030 / 0.030