PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-23:27:50
G01     70.4           32.9               10.5 +/-    0.98      17.3 +/-    0.98  0.060 / 0.070
G07     137.6          31.2               13.1 +/-    1.42      22.4 +/-    1.42  0.060 / 0.060
G11     55.1           32.5                8.8 +/-    1.61      14.6 +/-    1.61  0.080 / 0.120
G13     274.7          37.3               11.7 +/-    2.55      17.7 +/-    2.55  0.090 / 0.090
G15     301.8          15.7                8.4 +/-    1.51      20.5 +/-    1.51  0.040 / 0.040
G17     232.8          65.9               13.0 +/-    0.81      14.1 +/-    0.81  0.030 / 0.040
G18     334.1          -18.3               8.7 +/-    2.83      20.0 +/-    2.83  0.030 / 0.030
G19     224.5          42.1               13.4 +/-    2.24      18.9 +/-    2.24  0.030 / 0.040
G28     21.1           59.0                9.6 +/-    2.53      11.0 +/-    2.53  0.090 / 0.100
G30     135.6          58.4               12.8 +/-    0.52      14.7 +/-    0.52  0.050 / 0.130