PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-14:42:40
G01     43.1           19.1                6.2 +/-    3.17      13.9 +/-    3.17  0.040 / 0.040
G06     175.1          33.7                9.1 +/-    0.90      14.7 +/-    0.90  0.040 / 0.060
G13     240.8          25.9                6.7 +/-    2.36      12.8 +/-    2.36  0.110 / 0.280
G15     275.6          13.7                6.0 +/-    1.59      15.5 +/-    1.59  0.220 / 0.410
G17     334.9          75.7                6.7 +/-    0.64       6.9 +/-    0.64  0.030 / 0.030
G19     264.7          67.7                7.7 +/-    0.70       8.3 +/-    0.70  0.030 / 0.030
G24     317.9          14.4                3.8 +/-    1.68       9.6 +/-    1.68  0.050 / 0.040
G28     57.1           53.6                6.9 +/-    0.88       8.3 +/-    0.88  0.050 / 0.070
G30     152.9          32.1                8.2 +/-    0.85      13.8 +/-    0.85  0.110 / 0.180