PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-14:42:40
G01     68.9           32.7                9.4 +/-    1.04      15.6 +/-    1.04  0.040 / 0.050
G07     138.3          29.6                8.1 +/-    1.21      14.4 +/-    1.21  0.030 / 0.040
G11     52.2           29.0                8.5 +/-    0.86      15.3 +/-    0.86  0.050 / 0.070
G13     272.2          37.4                9.3 +/-    1.38      14.1 +/-    1.38  0.050 / 0.080
G15     303.7          14.1                5.9 +/-    1.80      15.0 +/-    1.80  0.040 / 0.060
G17     236.7          71.0                9.8 +/-    0.79      10.3 +/-    0.79  0.040 / 0.060
G18     47.5           17.1                6.8 +/-    0.75      16.0 +/-    0.75  0.080 / 0.190
G19     225.1          40.3               11.9 +/-    1.33      17.2 +/-    1.33  0.070 / 0.160
G28     22.0           59.0               10.6 +/-    0.41      12.1 +/-    0.41  0.060 / 0.140
G30     137.2          61.5               11.9 +/-    0.55      13.4 +/-    0.55  0.060 / 0.130