PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-15:43:00
G01     66.9           32.1                9.7 +/-    2.02      16.3 +/-    2.02  0.030 / 0.050
G07     138.9          24.8               12.9 +/-    0.75      25.2 +/-    0.75  0.030 / 0.040
G11     50.7           25.7                9.2 +/-    1.64      17.8 +/-    1.64  0.060 / 0.140
G13     272.8          36.5               12.6 +/-    2.18      19.5 +/-    2.18  0.040 / 0.150
G15     303.1          14.4                6.9 +/-    1.83      17.5 +/-    1.83  0.040 / 0.040
G17     242.6          74.4               13.0 +/-    1.57      13.5 +/-    1.57  0.030 / 0.030
G19     226.9          47.0               13.7 +/-    0.73      18.0 +/-    0.73  0.080 / 0.140
G28     25.0           58.4               11.5 +/-    0.89      13.2 +/-    0.89  0.050 / 0.140
G30     137.7          61.3               14.2 +/-    0.37      15.9 +/-    0.37  0.070 / 0.090