PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-14:28:10
G01     76.7           33.3                7.9 +/-    1.69      13.0 +/-    1.69  0.030 / 0.030
G07     134.3          35.5                9.5 +/-    0.55      15.0 +/-    0.55  0.030 / 0.040
G11     56.9           33.4                9.0 +/-    1.77      14.8 +/-    1.77  0.050 / 0.060
G13     280.6          38.0                7.9 +/-    1.68      11.9 +/-    1.68  0.070 / 0.070
G15     309.2          12.4                7.2 +/-    2.14      19.0 +/-    2.14  0.050 / 0.080
G17     225.6          65.0               12.1 +/-    0.68      13.2 +/-    0.68  0.080 / 0.080
G18     52.8           20.2                7.5 +/-    6.75      16.4 +/-    6.75  0.060 / 0.100
G19     220.7          34.3               10.3 +/-    1.31      16.5 +/-    1.31  0.080 / 0.110
G28     10.3           60.4               10.3 +/-    1.88      11.7 +/-    1.88  0.150 / 0.190
G30     129.1          67.8               10.1 +/-    0.90      10.8 +/-    0.90  0.230 / 0.300