PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-03:42:10
G08     295.2          23.3                8.3 +/-    2.16      16.9 +/-    2.16  0.030 / 0.030
G10     357.1          62.7                5.7 +/-    0.63       6.4 +/-    0.63  0.040 / 0.030
G14     227.3          45.1                9.2 +/-    2.89      12.3 +/-    2.89  0.050 / 0.030
G18     56.6           54.4                4.9 +/-    1.41       5.9 +/-    1.41  0.030 / 0.020
G21     144.1          44.0                7.9 +/-    1.25      10.8 +/-    1.25  0.040 / 0.060
G24     60.8           28.0                5.5 +/-    1.88      10.0 +/-    1.88  0.040 / 0.060
G27     256.5          33.1                7.1 +/-    3.34      11.7 +/-    3.34  0.080 / 0.090
G32     239.4          63.9                9.3 +/-    1.26      10.2 +/-    1.26  0.100 / 0.110