PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-07:57:40
G08     315.5          15.8                3.4 +/-    2.92       8.3 +/-    2.92  0.040 / 0.040
G10     319.8          58.0                4.4 +/-    0.46       5.1 +/-    0.46  0.040 / 0.030
G14     214.0          24.3                4.9 +/-    1.33       9.7 +/-    1.33  0.130 / 0.080
G15     45.8           15.6                1.8 +/-    3.17       4.4 +/-    3.17  0.110 / 0.070
G20     22.8           62.9                4.4 +/-    1.03       4.8 +/-    1.03  0.050 / 0.030
G21     125.6          62.2                5.9 +/-    0.81       6.6 +/-    0.81  0.030 / 0.030
G24     81.7           29.4                5.3 +/-    1.26       9.3 +/-    1.26  0.170 / 0.380
G27     286.9          37.1                4.4 +/-    0.97       6.7 +/-    0.97  0.140 / 0.250
G32     217.7          38.9                7.3 +/-    2.20      10.9 +/-    2.20  0.050 / 0.080