PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/19-07:58:00
G01     104.1          27.0                6.6 +/-    0.85      12.3 +/-    0.85  0.020 / 0.020
G07     111.9          54.8                5.4 +/-    0.46       6.5 +/-    0.46  0.030 / 0.030
G08     41.4           15.7                1.9 +/-    1.73       4.6 +/-    1.73  0.040 / 0.050
G11     82.8           42.3                5.2 +/-    0.67       7.3 +/-    0.67  0.040 / 0.040
G13     307.0          30.8                2.6 +/-    2.28       4.5 +/-    2.28  0.080 / 0.170
G17     206.2          43.1                6.2 +/-    1.97       8.6 +/-    1.97  0.070 / 0.170
G18     75.0           24.0                4.0 +/-    0.81       8.0 +/-    0.81  0.070 / 0.150
G19     210.3          12.4                2.0 +/-    4.36       5.4 +/-    4.36  0.060 / 0.130
G28     321.0          61.1                3.4 +/-    1.15       3.8 +/-    1.15  0.060 / 0.220
G30     28.1           79.3                5.5 +/-    0.63       5.6 +/-    0.63  0.060 / 0.240