PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-13:12:50
G10     264.3          36.1                3.6 +/-    0.99       5.6 +/-    0.99  0.080 / 0.100
G13     43.5           21.0                2.2 +/-    1.04       4.7 +/-    1.04  0.100 / 0.130
G15     60.6           49.0                4.5 +/-    0.96       5.7 +/-    0.96  0.050 / 0.080
G16     283.8          12.2                3.2 +/-    1.61       8.4 +/-    1.61  0.050 / 0.070
G18     300.7          65.2                3.0 +/-    0.80       3.3 +/-    0.80  0.040 / 0.040
G20     50.3           40.8                2.5 +/-    0.85       3.6 +/-    0.85  0.040 / 0.050
G21     7.0            71.9                3.7 +/-    0.78       3.9 +/-    0.78  0.080 / 0.330
G24     123.2          12.6                3.0 +/-    5.74       7.9 +/-    5.74  0.100 / 0.300
G27     319.1          18.0                2.0 +/-    1.03       4.6 +/-    1.03  0.090 / 0.200
G29     166.6          31.3                6.3 +/-    0.77      10.8 +/-    0.77  0.090 / 0.170