PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-16:42:50
G01     70.4           32.9               10.2 +/-    0.85      16.8 +/-    0.85  0.050 / 0.110
G07     137.6          30.9               12.9 +/-    1.54      22.2 +/-    1.54  0.060 / 0.120
G11     53.4           30.4                9.9 +/-    1.18      17.1 +/-    1.18  0.030 / 0.040
G13     273.9          37.6               11.9 +/-    1.05      18.1 +/-    1.05  0.030 / 0.050
G15     303.9          14.4                8.4 +/-    1.88      21.2 +/-    1.88  0.050 / 0.070
G17     233.6          68.3               13.4 +/-    0.66      14.3 +/-    0.66  0.040 / 0.080
G18     48.7           18.0                9.0 +/-    0.97      20.7 +/-    0.97  0.040 / 0.060
G19     224.3          39.8               12.1 +/-    1.67      17.6 +/-    1.67  0.030 / 0.050
G28     20.1           59.2               11.8 +/-    0.37      13.5 +/-    0.37  0.040 / 0.040
G30     135.9          61.9               11.9 +/-    0.80      13.3 +/-    0.80  0.030 / 0.050