PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-18:42:50
G01     85.8           32.7               13.5 +/-    0.48      22.5 +/-    0.48  0.130 / 0.290
G07     128.8          42.7               15.5 +/-    1.07      21.6 +/-    1.07  0.110 / 0.290
G11     65.3           38.7               11.8 +/-    0.54      17.6 +/-    0.54  0.030 / 0.040
G13     290.3          36.9               13.6 +/-    1.10      20.9 +/-    1.10  0.030 / 0.040
G15     313.2          11.1               10.2 +/-    3.05      27.9 +/-    3.05  0.040 / 0.070
G17     218.0          54.3               16.3 +/-    1.73      19.6 +/-    1.73  0.030 / 0.060
G18     60.4           23.2               10.4 +/-    0.44      21.2 +/-    0.44  0.050 / 0.090
G19     216.6          29.0               17.0 +/-    3.09      30.4 +/-    3.09  0.050 / 0.100
G28     356.8          61.4               12.6 +/-    1.17      14.2 +/-    1.17  0.050 / 0.060
G30     115.7          72.6               14.9 +/-    0.97      15.5 +/-    0.97  0.040 / 0.060