PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/15-08:12:40
G01     71.1           32.1                3.2 +/-    0.87       5.3 +/-    0.87  0.030 / 0.030
G07     135.9          31.8                5.9 +/-    1.26      10.0 +/-    1.26  0.040 / 0.040
G11     55.8           34.5                3.9 +/-    0.65       6.2 +/-    0.65  0.110 / 0.080
G13     275.4          38.9                5.6 +/-    1.34       8.4 +/-    1.34  0.140 / 0.100
G15     303.4          15.2                2.4 +/-    1.04       5.8 +/-    1.04  0.080 / 0.250
G17     228.0          66.4                5.5 +/-    0.95       6.0 +/-    0.95  0.090 / 0.250
G19     221.7          42.5                6.1 +/-    1.79       8.5 +/-    1.79  0.040 / 0.060
G28     0.0            61.4                3.0 +/-    0.66       3.3 +/-    0.66  0.040 / 0.050
G30     133.7          66.6                4.8 +/-    0.41       5.2 +/-    0.41  0.070 / 0.100