PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-13:42:30
G01     124.8          13.2                7.1 +/-    7.33      18.3 +/-    7.33  0.040 / 0.050
G07     67.6           66.8                7.8 +/-    0.79       8.5 +/-    0.79  0.030 / 0.040
G08     48.1           35.8                2.1 +/-   10.03       3.3 +/-   10.03  0.030 / 0.040
G09     176.4          32.1                4.9 +/-   11.64       8.3 +/-   11.64  0.030 / 0.050
G11     112.3          35.3               12.4 +/-    8.09      19.6 +/-    8.09  0.120 / 0.270
G13     321.2          11.8               -0.3 +/-   13.99      -0.7 +/-   13.99  0.090 / 0.210
G17     199.5          19.5                8.5 +/-    1.74      18.9 +/-    1.74  0.150 / 0.510
G28     280.4          54.0              -10.5 +/-   47.36     -12.7 +/-   47.36  0.150 / 0.560
G30     332.9          60.3                7.9 +/-    1.95       9.0 +/-    1.95  0.130 / 0.360