PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-07:57:50
G08     318.0          13.8                3.3 +/-    2.33       8.5 +/-    2.33  0.040 / 0.040
G10     313.3          56.7                5.1 +/-    1.46       5.9 +/-    1.46  0.030 / 0.030
G14     212.6          20.9                5.2 +/-    2.96      11.3 +/-    2.96  0.140 / 0.300
G15     45.6           18.8                3.9 +/-    2.30       8.9 +/-    2.30  0.260 / 0.190
G20     14.8           63.9                5.0 +/-    0.57       5.6 +/-    0.57  0.090 / 0.080
G21     120.0          65.3                8.4 +/-    0.41       9.1 +/-    0.41  0.080 / 0.090
G24     85.9           28.9                5.9 +/-    1.41      10.6 +/-    1.41  0.080 / 0.050
G27     291.5          36.4                4.4 +/-    1.87       6.8 +/-    1.87  0.060 / 0.050
G32     215.6          35.4                8.6 +/-    0.99      13.6 +/-    0.99  0.080 / 0.070