PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-07:12:40
G08     315.7          15.6                2.6 +/-    2.84       6.4 +/-    2.84  0.040 / 0.030
G10     319.9          58.1                5.1 +/-    0.53       5.9 +/-    0.53  0.040 / 0.030
G14     214.0          24.3                6.1 +/-    2.21      12.2 +/-    2.21  0.040 / 0.040
G15     45.8           15.6                1.8 +/-    2.40       4.4 +/-    2.40  0.040 / 0.040
G20     22.8           62.9                4.9 +/-    1.13       5.5 +/-    1.13  0.060 / 0.060
G21     125.5          62.6                6.2 +/-    0.45       6.8 +/-    0.45  0.060 / 0.080
G24     81.9           29.5                6.2 +/-    1.39      10.9 +/-    1.39  0.120 / 0.330
G27     286.7          37.2                5.3 +/-    1.12       8.1 +/-    1.12  0.170 / 0.250
G32     217.5          40.2                8.2 +/-    1.76      11.9 +/-    1.76  0.080 / 0.090