PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-14:57:30
G01     91.8           31.1               10.1 +/-    1.33      17.3 +/-    1.33  0.020 / 0.030
G07     124.3          43.4               11.7 +/-    1.61      16.1 +/-    1.61  0.020 / 0.030
G11     68.6           37.7                8.1 +/-    0.71      12.2 +/-    0.71  0.050 / 0.070
G13     298.4          34.1               11.4 +/-    1.06      18.4 +/-    1.06  0.040 / 0.070
G17     212.8          54.5               13.3 +/-    0.80      15.9 +/-    0.80  0.040 / 0.060
G19     213.6          27.3               12.7 +/-    1.31      23.5 +/-    1.31  0.030 / 0.060
G28     345.8          61.6                9.0 +/-    0.93      10.1 +/-    0.93  0.060 / 0.150
G30     87.5           79.0                9.3 +/-    1.05       9.4 +/-    1.05  0.050 / 0.140