PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-16:13:10
G01     61.5           30.7                9.7 +/-    1.05      16.7 +/-    1.05  0.090 / 0.380
G06     180.3          14.0               13.2 +/-    1.80      33.7 +/-    1.80  0.090 / 0.260
G07     141.2          20.3               10.3 +/-    1.45      22.6 +/-    1.45  0.070 / 0.110
G11     48.1           22.0                8.9 +/-    1.61      18.6 +/-    1.61  0.180 / 0.180
G13     266.7          35.4               11.1 +/-    1.19      17.6 +/-    1.19  0.080 / 0.130
G15     298.9          15.1                6.7 +/-    2.34      16.6 +/-    2.34  0.080 / 0.120
G17     259.9          77.8               11.7 +/-    0.45      11.9 +/-    0.45  0.030 / 0.030
G19     231.6          51.5               13.4 +/-    1.99      16.5 +/-    1.99  0.030 / 0.030
G28     33.2           57.0               11.5 +/-    0.67      13.4 +/-    0.67  0.020 / 0.030
G30     142.1          56.5               11.6 +/-    0.59      13.6 +/-    0.59  0.030 / 0.020