PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/11-08:27:50
G01     71.9           32.2                4.3 +/-    0.44       7.1 +/-    0.44  0.040 / 0.040
G07     135.5          32.2                8.4 +/-    0.91      14.0 +/-    0.91  0.050 / 0.040
G11     56.3           34.8                3.3 +/-    0.94       5.2 +/-    0.94  0.080 / 0.090
G13     276.3          39.0                6.4 +/-    1.05       9.5 +/-    1.05  0.070 / 0.100
G15     304.1          15.0                1.0 +/-    1.44       2.5 +/-    1.44  0.040 / 0.050
G17     227.0          65.6                7.0 +/-    0.78       7.6 +/-    0.78  0.050 / 0.040
G19     221.3          41.9                7.5 +/-    1.68      10.6 +/-    1.68  0.050 / 0.070
G28     359.0          61.4                3.9 +/-    0.55       4.3 +/-    0.55  0.040 / 0.060
G30     132.9          67.0                7.3 +/-    0.76       7.8 +/-    0.76  0.080 / 0.090