PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-06:27:50
G01     114.0          19.8                4.9 +/-    1.23      10.9 +/-    1.23  0.040 / 0.040
G07     90.3           63.8                5.4 +/-    0.47       5.9 +/-    0.47  0.040 / 0.040
G08     43.9           29.2                2.3 +/-    0.66       4.1 +/-    0.66  0.080 / 0.240
G09     174.8          21.0                5.6 +/-    1.06      12.1 +/-    1.06  0.090 / 0.240
G11     105.0          42.7                6.1 +/-    0.83       8.5 +/-    0.83  0.030 / 0.040
G13     315.3          23.5                2.5 +/-    1.92       5.0 +/-    1.92  0.030 / 0.040
G17     202.0          27.2                4.4 +/-    1.34       8.1 +/-    1.34  0.050 / 0.080
G28     287.4          53.6                6.1 +/-    0.68       7.4 +/-    0.68  0.050 / 0.090
G30     346.0          69.9                4.5 +/-    0.81       4.8 +/-    0.81  0.060 / 0.070