PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-14:42:50
G01     71.2           33.0               11.3 +/-    0.72      18.7 +/-    0.72  0.030 / 0.040
G07     137.2          31.3               11.6 +/-    2.08      19.8 +/-    2.08  0.030 / 0.050
G11     53.4           30.3               10.9 +/-    1.14      19.0 +/-    1.14  0.040 / 0.080
G13     274.6          37.7               11.0 +/-    0.97      16.6 +/-    0.97  0.040 / 0.080
G15     305.3          13.7                7.1 +/-    1.71      18.3 +/-    1.71  0.060 / 0.120
G17     232.9          69.2               12.4 +/-    0.40      13.2 +/-    0.40  0.060 / 0.130
G18     49.0           18.1                9.6 +/-    1.09      22.2 +/-    1.09  0.040 / 0.050
G19     223.8          38.6               13.1 +/-    0.75      19.5 +/-    0.75  0.030 / 0.060
G28     18.7           59.4               11.9 +/-    0.56      13.5 +/-    0.56  0.050 / 0.100
G30     135.2          63.3               13.0 +/-    0.78      14.4 +/-    0.78  0.050 / 0.130