PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-19:28:00
G01     85.8           32.7               12.2 +/-    1.61      20.2 +/-    1.61  0.160 / 0.240
G07     128.8          42.7               14.2 +/-    0.61      19.8 +/-    0.61  0.330 / 0.270
G11     65.5           38.9               13.2 +/-    1.58      19.6 +/-    1.58  0.030 / 0.040
G13     290.4          36.8               12.9 +/-    2.44      19.8 +/-    2.44  0.030 / 0.030
G15     313.0          11.3                7.0 +/-    4.50      19.0 +/-    4.50  0.030 / 0.050
G17     218.0          53.7               12.9 +/-    0.99      15.5 +/-    0.99  0.030 / 0.050
G18     60.4           23.2               10.8 +/-    1.08      22.0 +/-    1.08  0.040 / 0.040
G19     216.5          29.2               13.5 +/-    1.88      24.1 +/-    1.88  0.040 / 0.040
G28     357.0          61.4               12.2 +/-    1.00      13.7 +/-    1.00  0.080 / 0.130
G30     116.0          72.2               14.1 +/-    0.72      14.7 +/-    0.72  0.080 / 0.150