PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/13-08:27:50
G01     67.4           31.7                4.1 +/-    0.90       7.0 +/-    0.90  0.030 / 0.040
G07     137.7          28.8                5.5 +/-    1.03       9.8 +/-    1.03  0.040 / 0.040
G11     53.5           32.3                3.0 +/-    0.58       5.1 +/-    0.58  0.090 / 0.120
G13     271.3          38.5                7.1 +/-    1.05      10.6 +/-    1.05  0.080 / 0.120
G15     300.6          15.8                1.5 +/-    1.95       3.7 +/-    1.95  0.060 / 0.080
G17     233.3          69.2                6.3 +/-    0.75       6.7 +/-    0.75  0.070 / 0.110
G19     224.2          45.5                6.1 +/-    0.94       8.1 +/-    0.94  0.060 / 0.090
G28     6.3            61.2                2.5 +/-    0.60       2.8 +/-    0.60  0.080 / 0.110
G30     137.4          63.4                8.2 +/-    1.03       9.1 +/-    1.03  0.040 / 0.060