PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-13:42:50
G01     70.5           32.3                6.2 +/-    1.47      10.4 +/-    1.47  0.040 / 0.050
G07     136.6          28.3                6.1 +/-    1.57      11.1 +/-    1.57  0.040 / 0.040
G11     53.9           31.9                5.6 +/-    1.01       9.5 +/-    1.01  0.060 / 0.110
G13     274.1          38.6                8.0 +/-    1.09      11.9 +/-    1.09  0.080 / 0.100
G15     303.2          15.0                4.0 +/-    1.50       9.9 +/-    1.50  0.040 / 0.040
G17     229.4          64.7                9.3 +/-    0.95      10.2 +/-    0.95  0.040 / 0.040
G18     48.7           18.1                5.3 +/-    1.53      12.1 +/-    1.53  0.090 / 0.080
G19     222.7          42.9                8.7 +/-    1.88      12.2 +/-    1.88  0.100 / 0.080
G28     5.6            61.1                7.3 +/-    0.67       8.2 +/-    0.67  0.090 / 0.220
G30     135.0          61.8                8.0 +/-    0.46       9.0 +/-    0.46  0.080 / 0.200