PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-15:12:50
G01     75.0           33.2               10.9 +/-    0.71      17.8 +/-    0.71  0.020 / 0.040
G07     135.3          34.3               10.3 +/-    1.06      16.5 +/-    1.06  0.030 / 0.040
G11     55.9           32.6                8.1 +/-    0.84      13.5 +/-    0.84  0.060 / 0.090
G13     278.8          37.9               10.6 +/-    1.00      16.0 +/-    1.00  0.050 / 0.110
G15     307.7          13.1                9.4 +/-    1.30      24.4 +/-    1.30  0.060 / 0.080
G17     227.6          65.9               11.6 +/-    1.68      12.6 +/-    1.68  0.040 / 0.070
G18     51.7           19.7                8.9 +/-    0.76      19.8 +/-    0.76  0.040 / 0.070
G19     221.6          35.9               11.6 +/-    1.49      18.1 +/-    1.49  0.040 / 0.050
G28     13.0           60.1                9.8 +/-    0.57      11.1 +/-    0.57  0.060 / 0.120
G30     131.2          66.2               11.4 +/-    0.51      12.4 +/-    0.51  0.060 / 0.120