PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-18:12:50
G01     101.7          28.2               12.6 +/-    0.64      22.9 +/-    0.64  0.190 / 0.200
G07     114.1          54.6               13.6 +/-    0.75      16.2 +/-    0.75  0.110 / 0.250
G08     41.9           17.8                9.4 +/-    1.15      21.9 +/-    1.15  0.030 / 0.040
G11     82.7           42.9               13.4 +/-    0.83      18.6 +/-    0.83  0.030 / 0.040
G13     305.3          31.5               12.8 +/-    1.61      21.8 +/-    1.61  0.030 / 0.020
G17     209.0          40.4               16.0 +/-    1.76      23.1 +/-    1.76  0.030 / 0.020
G18     75.0           24.8               12.8 +/-    1.13      25.1 +/-    1.13  0.080 / 0.130
G19     210.9          16.3                5.8 +/-   19.54      14.1 +/-   19.54  0.090 / 0.120
G28     328.8          61.7               12.2 +/-    0.54      13.7 +/-    0.54  0.080 / 0.120
G30     55.4           79.5               14.3 +/-    0.70      14.5 +/-    0.70  0.080 / 0.140