PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-12:43:10
G01     320.9          11.4               -9.3 +/-   27.92     -25.3 +/-   27.92  0.040 / 0.050
G08     268.5          16.5                6.9 +/-    1.55      16.5 +/-    1.55  0.040 / 0.040
G10     66.5           57.4                4.0 +/-    0.65       4.7 +/-    0.65  0.070 / 0.090
G11     311.1          17.0                3.0 +/-    2.04       7.1 +/-    2.04  0.080 / 0.110
G14     270.4          65.7                5.9 +/-    0.92       6.4 +/-    0.92  0.230 / 0.230
G18     96.5           31.5                2.1 +/-    1.61       3.6 +/-    1.61  0.240 / 0.260
G21     154.8          11.4                3.8 +/-    3.79      10.3 +/-    3.79  0.150 / 0.350
G27     228.8          13.5                4.1 +/-    2.89      10.7 +/-    2.89  0.160 / 0.390
G31     176.6          34.9                5.0 +/-    0.76       8.0 +/-    0.76  0.190 / 0.320
G32     353.1          72.0                4.4 +/-    0.49       4.6 +/-    0.49  0.170 / 0.250