PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/23-08:42:50
G10     280.4          45.8                6.4 +/-    1.30       8.5 +/-    1.30  0.040 / 0.030
G15     49.9           38.5                4.5 +/-    1.03       6.8 +/-    1.03  0.040 / 0.040
G20     322.1          64.2                4.4 +/-    0.62       4.9 +/-    0.62  0.160 / 0.200
G21     54.6           76.0                4.9 +/-    1.28       5.0 +/-    1.28  0.330 / 0.210
G24     109.0          20.6                5.6 +/-    1.76      12.2 +/-    1.76  0.060 / 0.050
G27     313.5          25.5                3.5 +/-    1.78       6.7 +/-    1.78  0.080 / 0.070
G29     165.6          14.8                4.2 +/-    1.26      10.5 +/-    1.26  0.230 / 0.150
G32     207.3          15.3                4.6 +/-    1.37      11.3 +/-    1.37  0.130 / 0.150