PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-15:43:00
G01     71.9           33.1               10.2 +/-    1.25      16.8 +/-    1.25  0.040 / 0.030
G07     136.9          32.0               12.3 +/-    0.71      20.6 +/-    0.71  0.030 / 0.030
G11     54.1           31.0                9.6 +/-    1.73      16.4 +/-    1.73  0.060 / 0.090
G13     275.5          37.7               11.1 +/-    1.90      16.7 +/-    1.90  0.070 / 0.100
G15     305.4          13.8                7.9 +/-    1.05      20.1 +/-    1.05  0.290 / 0.180
G17     231.6          67.9               11.9 +/-    0.43      12.8 +/-    0.43  0.160 / 0.210
G18     49.6           18.5                9.3 +/-    2.79      21.2 +/-    2.79  0.050 / 0.120
G19     223.4          38.3               13.6 +/-    2.13      20.3 +/-    2.13  0.070 / 0.120
G28     17.7           59.5               11.7 +/-    1.12      13.4 +/-    1.12  0.070 / 0.080
G30     134.5          63.5               11.9 +/-    0.47      13.2 +/-    0.47  0.100 / 0.080