PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-15:58:10
G01     74.4           33.2                9.9 +/-    0.67      16.2 +/-    0.67  0.030 / 0.040
G07     135.6          33.9               12.1 +/-    1.15      19.6 +/-    1.15  0.040 / 0.040
G11     55.7           32.5                7.9 +/-    0.98      13.2 +/-    0.98  0.060 / 0.100
G13     278.2          37.9               11.5 +/-    1.15      17.3 +/-    1.15  0.060 / 0.110
G15     307.0          13.4                8.8 +/-    1.40      22.7 +/-    1.40  0.060 / 0.140
G17     228.3          65.7               12.6 +/-    0.69      13.7 +/-    0.69  0.070 / 0.130
G18     51.4           19.5                8.0 +/-    1.35      17.8 +/-    1.35  0.060 / 0.080
G19     222.0          36.5               14.1 +/-    1.41      21.7 +/-    1.41  0.050 / 0.080
G28     14.0           60.0                9.7 +/-    0.70      11.1 +/-    0.70  0.040 / 0.060
G30     131.9          65.4               12.1 +/-    0.40      13.2 +/-    0.40  0.050 / 0.050