PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-14:57:50
G08     311.9          17.3                4.7 +/-    2.42      11.0 +/-    2.42  0.060 / 0.070
G10     328.1          59.3                3.1 +/-    0.47       3.6 +/-    0.47  0.070 / 0.070
G14     217.6          28.7                6.1 +/-    2.40      11.1 +/-    2.40  0.260 / 0.320
G15     46.6           10.5                3.6 +/-    2.55       9.8 +/-    2.55  0.060 / 0.060
G18     40.3           58.5                5.0 +/-    0.63       5.7 +/-    0.63  0.360 / 0.380
G20     83.7           9.9                 4.5 +/-   11.03      12.7 +/-   11.03  0.200 / 0.450
G21     132.8          54.9                5.9 +/-    0.72       7.0 +/-    0.72  0.040 / 0.050
G24     76.7           30.5                4.3 +/-    1.20       7.4 +/-    1.20  0.040 / 0.040
G27     275.4          37.8                5.0 +/-    2.50       7.6 +/-    2.50  0.190 / 0.170
G32     222.2          50.9                6.1 +/-    2.07       7.6 +/-    2.07  0.130 / 0.140