PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-13:57:40
G01     89.6           31.9                6.5 +/-    0.65      10.9 +/-    0.65  0.020 / 0.030
G07     126.0          45.0                7.7 +/-    0.70      10.4 +/-    0.70  0.020 / 0.020
G11     67.2           39.0                6.0 +/-    1.72       8.8 +/-    1.72  0.050 / 0.050
G13     293.8          36.3                6.3 +/-    2.67       9.7 +/-    2.67  0.050 / 0.050
G17     214.7          54.7                9.7 +/-    0.81      11.6 +/-    0.81  0.080 / 0.100
G18     62.8           23.5                6.5 +/-    1.03      13.1 +/-    1.03  0.100 / 0.100
G19     215.1          24.6                8.5 +/-    2.43      16.8 +/-    2.43  0.080 / 0.100
G28     349.8          61.7                6.8 +/-    0.65       7.6 +/-    0.65  0.110 / 0.110
G30     103.4          76.9                7.4 +/-    0.47       7.6 +/-    0.47  0.050 / 0.100