PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-07:57:50
G01     65.8           31.4                4.8 +/-    1.20       8.1 +/-    1.20  0.030 / 0.030
G07     138.4          27.9                6.7 +/-    1.15      12.4 +/-    1.15  0.030 / 0.030
G11     52.7           31.6                5.0 +/-    1.41       8.4 +/-    1.41  0.130 / 0.280
G13     269.6          38.3                7.1 +/-    2.61      10.7 +/-    2.61  0.140 / 0.330
G15     299.1          16.1                3.3 +/-    2.36       7.9 +/-    2.36  0.060 / 0.060
G17     235.9          70.7                8.7 +/-    0.22       9.2 +/-    0.22  0.060 / 0.050
G19     225.2          46.7                8.9 +/-    2.16      11.7 +/-    2.16  0.070 / 0.110
G28     8.4            61.1                4.7 +/-    1.59       5.3 +/-    1.59  0.060 / 0.120
G30     138.8          62.4                6.7 +/-    0.56       7.4 +/-    0.56  0.080 / 0.120