PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-07:12:50
G01     87.1           32.4                4.8 +/-    1.62       8.0 +/-    1.62  0.040 / 0.050
G07     127.8          42.4                7.3 +/-    0.50      10.3 +/-    0.50  0.050 / 0.050
G11     66.1           38.1                5.4 +/-    0.74       8.1 +/-    0.74  0.040 / 0.060
G13     293.2          35.7                4.8 +/-    1.68       7.5 +/-    1.68  0.040 / 0.050
G15     313.5          11.3               -1.0 +/-   10.31      -2.8 +/-   10.31  0.050 / 0.040
G17     216.5          57.7                6.2 +/-    0.92       7.2 +/-    0.92  0.050 / 0.040
G19     215.7          30.8                4.0 +/-    2.26       7.0 +/-    2.26  0.360 / 0.230
G28     355.6          61.4                3.3 +/-    1.00       3.7 +/-    1.00  0.150 / 0.360
G30     111.7          73.4                5.3 +/-    0.49       5.6 +/-    0.49  0.090 / 0.120