PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-19:27:50
G01     47.5           23.5               11.6 +/-    0.80      23.5 +/-    0.80  0.090 / 0.260
G06     176.2          29.4               18.1 +/-    2.05      32.1 +/-    2.05  0.090 / 0.260
G11     44.1           12.8               10.9 +/-    2.92      28.6 +/-    2.92  0.060 / 0.110
G13     247.2          28.5               14.4 +/-    1.47      26.0 +/-    1.47  0.060 / 0.080
G15     281.4          14.9               13.8 +/-    1.53      34.4 +/-    1.53  0.040 / 0.070
G17     318.4          77.3               13.8 +/-    0.47      14.1 +/-    0.47  0.040 / 0.060
G19     251.2          60.7               15.1 +/-    1.26      17.0 +/-    1.26  0.030 / 0.030
G24     318.7          11.2              -18.6 +/-   15.09     -50.5 +/-   15.09  0.030 / 0.030
G28     57.6           51.5               13.2 +/-    0.92      16.3 +/-    0.92  0.040 / 0.050
G30     151.1          37.6               14.5 +/-    0.97      22.0 +/-    0.97  0.040 / 0.050