PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-15:27:50
G01     43.2           19.2                8.1 +/-    3.12      18.2 +/-    3.12  0.160 / 0.280
G06     175.3          33.6               10.0 +/-    1.07      16.3 +/-    1.07  0.170 / 0.320
G13     240.9          25.9               10.2 +/-    3.17      19.6 +/-    3.17  0.040 / 0.060
G15     275.4          13.7                7.7 +/-    1.65      19.8 +/-    1.65  0.040 / 0.060
G17     337.4          75.6               11.1 +/-    0.52      11.5 +/-    0.52  0.030 / 0.020
G19     264.5          67.6               11.7 +/-    0.82      12.6 +/-    0.82  0.030 / 0.030
G24     317.9          14.5                6.0 +/-    1.73      15.1 +/-    1.73  0.050 / 0.050
G28     57.4           53.4               10.6 +/-    0.95      12.8 +/-    0.95  0.040 / 0.040
G30     152.7          31.6                9.7 +/-    0.94      16.4 +/-    0.94  0.070 / 0.080