PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-16:27:50
G01     81.2           33.2               10.2 +/-    1.10      16.7 +/-    1.10  0.040 / 0.070
G07     131.8          39.0               12.0 +/-    0.71      17.7 +/-    0.71  0.040 / 0.070
G11     60.7           36.1                8.5 +/-    0.55      13.2 +/-    0.55  0.040 / 0.030
G13     285.4          37.7               10.1 +/-    1.27      15.2 +/-    1.27  0.040 / 0.030
G15     311.2          11.9                8.2 +/-    2.03      21.9 +/-    2.03  0.070 / 0.110
G17     221.4          59.9               11.2 +/-    1.46      12.7 +/-    1.46  0.060 / 0.120
G18     56.4           21.8                8.0 +/-    0.65      16.8 +/-    0.65  0.060 / 0.120
G19     218.6          31.7               11.2 +/-    2.11      18.9 +/-    2.11  0.060 / 0.100
G28     3.7            61.0               10.2 +/-    0.67      11.5 +/-    0.67  0.040 / 0.050
G30     123.2          70.3               11.7 +/-    0.84      12.4 +/-    0.84  0.040 / 0.060